How To Use Guide
Use this guide to understand what each MondayTool tool is for, what information you need before opening it, and what kind of result you can expect.
Most tools follow the same simple flow: open the tool, enter text, numbers, files, or URLs, adjust any settings, then copy or download the result. File tools are designed to work in the browser whenever possible.
Jump to the type of task you want to finish. Each category includes a short workflow image, setup advice, and detailed notes for every tool.
Calculators
Precise calculations for everyday needs
Image Tools
Convert, resize, and compress images in your browser
Document Tools
Convert, create, and compress document files locally
Text Tools
Utilities for text, color, security, and quick creation
Developer Tools
Formatter, preview, encoding, and comparison utilities
Network & API
URL, DNS, IP, and API reference utilities
Security
Tokens, hashing, certificate decoding, and secret scanning
Calculator tools are built for quick, repeatable answers. Enter the required numbers once, review the result immediately, then adjust the values if you want to compare another scenario.
Basic workflow
Choose the calculator that matches your question.
Enter the required values and optional settings.
Review the answer, breakdown, or table shown by the tool.
Calculate percentages, increases, and decreases
Best for
Calculate percentages, increases, and decreases.
How to use
Choose the percentage calculation you need, enter the values, and read the instant result.
What you get
A clear percentage answer for discounts, increases, decreases, and comparisons.
Exact age in years, months, and days
Best for
Exact age in years, months, and days.
How to use
Enter a birth date or target date, then use the result breakdown for exact years, months, weeks, and days.
What you get
A precise age breakdown you can use for forms, records, dates, or planning.
Body Mass Index with metric and imperial modes
Best for
Body Mass Index with metric and imperial modes.
How to use
Select metric or imperial units, enter height and weight, and check the BMI category shown below.
What you get
A BMI value with the matching weight category based on the units you choose.
Monthly payments, interest, and totals
Best for
Monthly payments, interest, and totals.
How to use
Enter loan amount, interest rate, and term to estimate the monthly payment and total interest.
What you get
Monthly payment, total interest, and repayment details for the loan scenario.
Days, weeks, and months between dates
Best for
Days, weeks, and months between dates.
How to use
Pick the start and end dates to see the exact gap in days, weeks, months, and years.
What you get
The exact time gap between two dates in multiple useful units.
Length, weight, volume, and temperature
Best for
Length, weight, volume, and temperature.
How to use
Choose a unit type, select the from and to units, then enter the value to convert instantly.
What you get
Converted values across common measurement systems without manual formulas.
Weighted GPA and CGPA for multiple country grading systems
Best for
Weighted GPA and CGPA for multiple country grading systems.
How to use
Add subjects or semesters with credits and grades, then review the calculated GPA or CGPA.
What you get
Semester GPA, cumulative CGPA, and grade-scale calculations.
See your attendance percentage, safe leaves, and recovery classes
Best for
See your attendance percentage, safe leaves, and recovery classes.
How to use
Enter total classes, attended classes, and the required percentage to see your attendance status.
What you get
Current attendance percentage plus classes needed or safe leaves.
Estimate upcoming periods, ovulation, and fertile dates
Best for
Estimate upcoming periods, ovulation, and fertile dates.
How to use
Enter the last period date and average cycle length to estimate the next dates and fertile window.
What you get
Estimated period dates, ovulation date, and fertile window ranges.
Estimate take-home pay after tax and monthly deductions
Best for
Estimate take-home pay after tax and monthly deductions.
How to use
Fill in salary, deductions, and tax settings to estimate your monthly take-home amount.
What you get
Estimated take-home salary after taxes and deductions.
Track spending, monitor a budget, and export PDF reports
Best for
Track spending, monitor a budget, and export PDF reports.
How to use
Add income and expense entries, review the category summary, then export the report if needed.
What you get
A running spending record, category summary, and exportable report.
Run a local countdown with start, stop, resume, reset, and session history
Best for
Run a local countdown with start, stop, resume, reset, and session history.
How to use
Set hours, minutes, and seconds, then start, pause, resume, or reset the timer as needed.
What you get
A local timer session with controls and recent session history.
Add or remove VAT using custom rates or country presets
Best for
Add or remove VAT using custom rates or country presets.
How to use
Choose add or remove VAT, enter the price and tax rate, then copy the net and gross totals.
What you get
Net price, VAT amount, and gross price based on your selected rate.
Calculate tip and split any bill with per-person breakdown and rounding modes
Best for
Calculate tip and split any bill with per-person breakdown and rounding modes.
How to use
Enter the bill amount, choose a tip percentage, set the number of people, then read the per-person share.
What you get
Total tip amount, per-person share, and total bill split across the group.
See savings grow with interest, contributions, and a year-by-year chart
Best for
See savings grow with interest, contributions, and a year-by-year chart.
How to use
Enter principal, interest rate, compounding frequency, and duration to see total growth and a year-by-year breakdown.
What you get
Final balance, total interest earned, and a year-by-year growth breakdown.
Add appliances and estimate your monthly electricity cost instantly
Best for
Add appliances and estimate your monthly electricity cost instantly.
How to use
Add each appliance with its wattage and daily hours, set your electricity rate, and read the estimated monthly cost.
What you get
Estimated monthly electricity cost based on your appliances and local rate.
Calculate trip fuel cost with mileage, price, return journey, and per-person split
Best for
Calculate trip fuel cost with mileage, price, return journey, and per-person split.
How to use
Enter trip distance, fuel efficiency, and fuel price, then optionally add return journey or split by passengers.
What you get
Total trip fuel cost with optional return journey and per-person split.
US Navy method body fat estimate with BMI and category scale
Best for
US Navy method body fat estimate with BMI and category scale.
How to use
Enter your height, weight, neck, and waist measurements to get an estimated body fat percentage and category.
What you get
Estimated body fat percentage and a category rating based on the US Navy method.
Full trig, log, factorial, and power calculations — browser-only
Best for
Full trig, log, factorial, and power calculations — browser-only.
How to use
Type an expression or use the on-screen buttons for trig, log, power, and factorial operations, then read the result.
What you get
A clear result you can copy, download, or use in your next task.
Original price and discount percentage to final price and savings
Best for
Original price and discount percentage to final price and savings.
How to use
Enter the original price and the discount percentage to instantly see the discounted price and amount saved.
What you get
A clear result you can copy, download, or use in your next task.
Return on investment with profit and loss breakdown
Best for
Return on investment with profit and loss breakdown.
How to use
Enter the initial investment and final value to see ROI percentage, net profit or loss, and gain multiple.
What you get
A clear result you can copy, download, or use in your next task.
Purchasing power of money across years using inflation rate
Best for
Purchasing power of money across years using inflation rate.
How to use
Enter an amount, start year, end year, and annual inflation rate to see its equivalent value over time.
What you get
A clear result you can copy, download, or use in your next task.
Daily calorie needs based on age, weight, height, and activity level
Best for
Daily calorie needs based on age, weight, height, and activity level.
How to use
Enter age, gender, weight, height, and activity level to see your BMR, TDEE, and goal-based calorie targets.
What you get
A clear result you can copy, download, or use in your next task.
Multiple formula methods — BMI, Devine, Robinson, and Miller
Best for
Multiple formula methods — BMI, Devine, Robinson, and Miller.
How to use
Enter your height and gender to see ideal weight estimates across four different medical formulas.
What you get
A clear result you can copy, download, or use in your next task.
Daily water needs based on weight and activity level
Best for
Daily water needs based on weight and activity level.
How to use
Enter your body weight and activity level to get a recommended daily water intake in litres and cups.
What you get
A clear result you can copy, download, or use in your next task.
Speed, distance, and time converter for runners and athletes
Best for
Speed, distance, and time converter for runners and athletes.
How to use
Enter any two of speed, distance, or time and the calculator fills in the third value with pace details.
What you get
A clear result you can copy, download, or use in your next task.
Weighted grades to final score and letter grade
Best for
Weighted grades to final score and letter grade.
How to use
Add each assignment or exam with its score and weight, then read the weighted final grade and letter.
What you get
A clear result you can copy, download, or use in your next task.
Add or subtract time durations in hours, minutes, and seconds
Best for
Add or subtract time durations in hours, minutes, and seconds.
How to use
Enter two or more time durations to add or subtract them and see the total in hours, minutes, and seconds.
What you get
A clear result you can copy, download, or use in your next task.
How long to reach a savings target at a given monthly contribution and rate
Best for
How long to reach a savings target at a given monthly contribution and rate.
How to use
Enter your savings goal, current balance, monthly contribution, and interest rate to see when you will reach the target.
What you get
A clear result you can copy, download, or use in your next task.
Fixed cost, variable cost, and price to break-even units and revenue
Best for
Fixed cost, variable cost, and price to break-even units and revenue.
How to use
Enter fixed costs, variable cost per unit, and selling price to calculate break-even units and total revenue.
What you get
A clear result you can copy, download, or use in your next task.
Image tools focus on upload, preview, edit, and export. Most image work happens locally in your browser, which keeps the workflow fast and avoids unnecessary file uploads.
Basic workflow
Upload or drag in your image files.
Pick the output format, quality, size, or edit setting.
Preview the result and download one file or a bulk ZIP where available.
Convert JPG images to PNG format
Best for
Convert JPG images to PNG format.
How to use
Upload one JPG or enable bulk mode for many files, convert them, then download PNG files or a ZIP.
What you get
PNG output files, with bulk ZIP download when several JPGs are converted.
Convert PNG images to JPG format
Best for
Convert PNG images to JPG format.
How to use
Upload PNG files, adjust JPEG quality, convert, then download each JPG or all files as a ZIP.
What you get
JPG output files at your selected quality, including bulk ZIP download.
Resize by pixels or percentage
Best for
Resize by pixels or percentage.
How to use
Upload an image, set new dimensions or scale percentage, preview the size, and download the resized file.
What you get
A resized image with the exact dimensions or scale you selected.
Reduce file size while preserving quality
Best for
Reduce file size while preserving quality.
How to use
Upload one or more images, choose quality, compress them, then download the compressed JPG files.
What you get
Smaller JPG files with before and after file size details.
Crop a chosen region and export the result
Best for
Crop a chosen region and export the result.
How to use
Upload an image, set the crop area, generate the crop, and download the selected region.
What you get
A cropped image containing only the area you selected.
Strip common EXIF and location metadata
Best for
Strip common EXIF and location metadata.
How to use
Upload an image, let the tool redraw a clean copy, then download the version without common metadata.
What you get
A clean image copy with common hidden metadata removed.
Rotate left or right and flip images fast
Best for
Rotate left or right and flip images fast.
How to use
Upload an image, choose rotation or flip controls, apply the change, and download the edited PNG.
What you get
A rotated or mirrored image ready to download.
Convert to PNG, JPG, or WebP with selectable output
Best for
Convert to PNG, JPG, or WebP with selectable output.
How to use
Upload an image, choose the target format and quality, then convert and download the new file.
What you get
A new image file in PNG, JPG, or WebP format.
Click any part of an image to get HEX and RGB
Best for
Click any part of an image to get HEX and RGB.
How to use
Upload an image and click a pixel to copy or reference its HEX, RGB, and related color values.
What you get
HEX, RGB, and color values sampled from the image pixel you click.
Combine two images side by side, up and down, or as an overlay
Best for
Combine two images side by side, up and down, or as an overlay.
How to use
Upload two images, choose merge direction or overlay settings, then export the combined PNG.
What you get
One combined PNG built from two source images.
Preview dimensions, size, and aspect ratio
Best for
Preview dimensions, size, and aspect ratio.
How to use
Upload an image to inspect its dimensions, file size, aspect ratio, and preview before using it elsewhere.
What you get
Image dimensions, file size, aspect ratio, and preview details.
Remove a simple background color and export PNG
Best for
Remove a simple background color and export PNG.
How to use
Upload an image with a plain background, tune the removal settings, and download a transparent PNG.
What you get
A transparent PNG when the original image has a simple background.
Convert an uploaded image into a Base64 data URL
Best for
Convert an uploaded image into a Base64 data URL.
How to use
Upload an image, generate the Base64 data URL, then copy it for HTML, CSS, or JavaScript.
What you get
A Base64 data URL for embedding the image directly in code.
Draw quick screenshot-style mockups on canvas
Best for
Draw quick screenshot-style mockups on canvas.
How to use
Open the canvas, draw or mark up your content, then download the result as a PNG.
What you get
A downloadable PNG from your canvas sketch or markup.
Apply a pixelation effect for censoring or style
Best for
Apply a pixelation effect for censoring or style.
How to use
Upload an image, choose pixel block strength, apply the effect, and download the pixelated image.
What you get
A pixelated image for privacy masking or a blocky visual effect.
Tune brightness, contrast, and a simple sharpness boost
Best for
Tune brightness, contrast, and a simple sharpness boost.
How to use
Upload an image, move the adjustment sliders, preview the changes, and download the edited output.
What you get
An adjusted image with your chosen brightness, contrast, saturation, hue, or sharpness.
Document tools help prepare practical files such as invoices, PDFs, and Word documents. Add or upload the source content, review the generated output, and download a usable document.
Basic workflow
Choose the document task you need.
Enter details or upload the source file.
Review the output and export the finished PDF, DOCX, or report.
Create customizable invoices with logo, currency, line items, totals, and extra text
Best for
Create customizable invoices with logo, currency, line items, totals, and extra text.
How to use
Enter business and client details, add line items and taxes, then download the invoice as a PDF.
What you get
A professional invoice PDF with your business details, items, and totals.
Convert PDF to Word or Word to PDF with local downloads
Best for
Convert PDF to Word or Word to PDF with local downloads.
How to use
Choose a conversion mode, upload the document, wait for processing, and download the converted file.
What you get
A converted document file, depending on the PDF to Word or Word to PDF mode.
Compress PDF and DOCX files with safe or strong compression modes
Best for
Compress PDF and DOCX files with safe or strong compression modes.
How to use
Upload a PDF or DOCX file, choose Preserve Layout or Strong Compression, then download the smaller document.
What you get
A compressed PDF or DOCX file with before and after file size details.
Build a clean printable resume in your browser with live preview and accent colors
Best for
Build a clean printable resume in your browser with live preview and accent colors.
How to use
Fill in your details, experience, and skills, choose an accent color, preview the layout, then print or download.
What you get
A print-ready resume with your details, experience, and skills laid out cleanly.
Create multi-section checklists with progress tracking and print to PDF
Best for
Create multi-section checklists with progress tracking and print to PDF.
How to use
Add sections and checklist items, track progress as you check items off, then print or save the list as a PDF.
What you get
A completed checklist with progress tracking, ready to print or save as PDF.
Design a canvas-rendered business card and download as PNG
Best for
Design a canvas-rendered business card and download as PNG.
How to use
Enter your name, title, and contact details, choose a style, preview the card, then download it as a PNG.
What you get
A downloadable PNG business card with your chosen design and contact details.
Fill-in template to a downloadable PDF cover letter in minutes
Best for
Fill-in template to a downloadable PDF cover letter in minutes.
How to use
Fill in your name, role, company, and key points, choose a tone, preview the letter, then download the PDF.
What you get
A clear result you can copy, download, or use in your next task.
Add agenda items and time slots then export a printable agenda PDF
Best for
Add agenda items and time slots then export a printable agenda PDF.
How to use
Enter meeting details, add agenda items with durations, reorder as needed, then print or export the agenda.
What you get
A clear result you can copy, download, or use in your next task.
Monthly income vs expenses with category breakdown and balance summary
Best for
Monthly income vs expenses with category breakdown and balance summary.
How to use
Add income sources and expense categories, enter amounts, and review the monthly balance and category totals.
What you get
A clear result you can copy, download, or use in your next task.
Text tools are made for copy-and-paste tasks: count, convert, generate, preview, and copy the finished result. They work best when you need a clean output quickly.
Basic workflow
Paste or type the source text, URL, or color value.
Choose the conversion, generation, or formatting option.
Copy, download, or reuse the generated result.
Words, characters, sentences, and paragraphs
Best for
Words, characters, sentences, and paragraphs.
How to use
Paste or type text to see word count, character count, sentence count, and reading time update instantly.
What you get
Live word, character, sentence, paragraph, and reading-time counts.
Upper, lower, title, and sentence case
Best for
Upper, lower, title, and sentence case.
How to use
Paste text, choose the case style you need, then copy the converted result.
What you get
Converted text in the case style you selected.
Generate QR codes from text or URLs
Best for
Generate QR codes from text or URLs.
How to use
Enter a URL or text, adjust the QR size if needed, then download the generated PNG.
What you get
A downloadable QR code image for your URL, text, or message.
Secure passwords with local crypto generation
Best for
Secure passwords with local crypto generation.
How to use
Choose length and character options, generate a password, then copy it into your password manager.
What you get
A strong generated password that matches your length and character settings.
Convert between HEX, RGB, and HSL
Best for
Convert between HEX, RGB, and HSL.
How to use
Enter a color value in one format to see matching HEX, RGB, HSL, and related values.
What you get
Equivalent color codes across HEX, RGB, HSL, and related formats.
Build coordinated palettes from one base color
Best for
Build coordinated palettes from one base color.
How to use
Pick a base color, choose a palette type, then copy the generated color codes.
What you get
A coordinated color palette with copy-ready color codes.
Classic name matching with full elimination steps
Best for
Classic name matching with full elimination steps.
How to use
Enter two names, run the calculator, and read the shown FLAMES result and steps.
What you get
A classic FLAMES result with the elimination steps shown.
AES-256 encrypt and decrypt text with a password — nothing leaves your browser
Best for
AES-256 encrypt and decrypt text with a password — nothing leaves your browser.
How to use
Type or paste your text, enter a password, choose encrypt or decrypt, then copy the result.
What you get
AES-256 encrypted or decrypted text ready to copy — processed entirely in your browser.
Convert text into URL slug, camelCase, snake_case, PascalCase, and more
Best for
Convert text into URL slug, camelCase, snake_case, PascalCase, and more.
How to use
Paste or type your text to see it converted into all common slug and case formats at once.
What you get
Your text converted into URL slug, camelCase, snake_case, PascalCase, and more formats.
Inspect every character — code points, UTF-8 bytes, HTML entities, and block name
Best for
Inspect every character — code points, UTF-8 bytes, HTML entities, and block name.
How to use
Paste any text to see a character-by-character breakdown of Unicode code points, bytes, and entity names.
What you get
A character-by-character table of code points, UTF-8 bytes, and HTML entities.
Generate classic, hipster, corporate, or tech placeholder text
Best for
Generate classic, hipster, corporate, or tech placeholder text.
How to use
Choose a style and set the paragraph or word count, then copy the generated placeholder text.
What you get
Generated placeholder text in your chosen style and length, ready to copy.
Remove extra spaces, blank lines, special characters, and formatting noise
Best for
Remove extra spaces, blank lines, special characters, and formatting noise.
How to use
Paste messy text, choose which cleanup options to apply, then copy the cleaned output.
What you get
A clear result you can copy, download, or use in your next task.
Flip text backwards or upside-down instantly
Best for
Flip text backwards or upside-down instantly.
How to use
Paste or type text, choose reverse or mirror mode, then copy the flipped result.
What you get
A clear result you can copy, download, or use in your next task.
Sort lines alphabetically, in reverse, randomly, or by length
Best for
Sort lines alphabetically, in reverse, randomly, or by length.
How to use
Paste a list of lines, choose a sort mode, then copy the sorted output.
What you get
A clear result you can copy, download, or use in your next task.
Strip repeated lines from any text block instantly
Best for
Strip repeated lines from any text block instantly.
How to use
Paste text with repeated lines, run the tool, then copy the deduplicated result.
What you get
A clear result you can copy, download, or use in your next task.
See which words appear most often in a block of text
Best for
See which words appear most often in a block of text.
How to use
Paste any text to see a ranked table of the most frequent words and their counts.
What you get
A clear result you can copy, download, or use in your next task.
Regex-powered find and replace in pasted text with live preview
Best for
Regex-powered find and replace in pasted text with live preview.
How to use
Paste text, enter a search term or regex pattern and a replacement, then copy the updated result.
What you get
A clear result you can copy, download, or use in your next task.
Convert text to Morse code and decode Morse back to text
Best for
Convert text to Morse code and decode Morse back to text.
How to use
Type or paste text to encode it as Morse, or paste dots and dashes to decode it back to plain text.
What you get
A clear result you can copy, download, or use in your next task.
Convert numbers across binary, hexadecimal, and decimal bases
Best for
Convert numbers across binary, hexadecimal, and decimal bases.
How to use
Enter a number in any base — binary, hex, or decimal — to instantly see its value in all three formats.
What you get
A clear result you can copy, download, or use in your next task.
Repeat any word or phrase N times with a custom separator
Best for
Repeat any word or phrase N times with a custom separator.
How to use
Enter the text to repeat, set the count, choose a separator, then copy the repeated output.
What you get
A clear result you can copy, download, or use in your next task.
Score and detailed feedback on any password — no network calls
Best for
Score and detailed feedback on any password — no network calls.
How to use
Type a password to see its strength score, entropy, and specific feedback on how to improve it.
What you get
A clear result you can copy, download, or use in your next task.
Developer tools help inspect code, URLs, content, and website basics. Paste the input, run the check, and use the formatted output or report in your project workflow.
Basic workflow
Paste code, text, URLs, or domain names.
Run the formatter, validator, audit, or generator.
Copy the output or download the report when the tool provides one.
Check Moz authority, page authority, spam score, and backlink metrics
Best for
Check Moz authority, page authority, spam score, and backlink metrics.
How to use
Enter one domain per line, run the checker, then copy or download the CSV report for comparison.
What you get
Authority metrics and CSV export for one or more domains.
Audit a website URL for technical SEO, metadata, headings, links, and report exports
Best for
Audit a website URL for technical SEO, metadata, headings, links, and report exports.
How to use
Enter a website URL, run the audit, review the issue summary, and export the report for fixes or sharing.
What you get
A practical SEO report with technical checks, page signals, and export options.
Flesch-Kincaid and Coleman-Liau analysis
Best for
Flesch-Kincaid and Coleman-Liau analysis.
How to use
Paste text to calculate readability scores, grade level, sentence stats, and improvement signals.
What you get
Readability scores, grade level estimates, and writing statistics.
Validate, beautify, and minify JSON
Best for
Validate, beautify, and minify JSON.
How to use
Paste JSON, validate it, then beautify for reading or minify for compact output.
What you get
Validated, beautified, minified, or easier-to-read JSON.
Remove comments and compress common snippets
Best for
Remove comments and compress common snippets.
How to use
Paste CSS or JavaScript, choose the matching mode, then minify and copy the compressed code.
What you get
Compressed CSS or JavaScript ready to copy into your workflow.
Preview markdown and copy generated HTML
Best for
Preview markdown and copy generated HTML.
How to use
Write or paste Markdown, review the live preview, then copy the generated HTML when needed.
What you get
A live Markdown preview and generated HTML output.
Compare two text versions line by line
Best for
Compare two text versions line by line.
How to use
Paste the old and new text versions to highlight additions, removals, and unchanged lines.
What you get
A side-by-side view of changed, added, removed, and unchanged text.
Convert text to and from Base64
Best for
Convert text to and from Base64.
How to use
Paste text or Base64 content, choose encode or decode, then copy the converted output.
What you get
Encoded Base64 text or decoded plain text.
Create selectable card-type test records for QA and demos
Best for
Create selectable card-type test records for QA and demos.
How to use
Select a card type and generate test card data for UI testing and demos only.
What you get
Test card data for QA forms, demos, and payment UI testing.
Create a clean robots.txt file with crawler rules and sitemap support
Best for
Create a clean robots.txt file with crawler rules and sitemap support.
How to use
Choose crawler rules, add allowed or blocked paths and sitemap URL, then download robots.txt.
What you get
A downloadable robots.txt file with crawler and sitemap rules.
Build a valid XML sitemap from your page URLs in seconds
Best for
Build a valid XML sitemap from your page URLs in seconds.
How to use
Enter your site URL or page list, generate the XML sitemap, then download it for your website.
What you get
A valid XML sitemap you can download and submit.
Decode JSON Web Tokens, inspect claims, and check expiry — fully in your browser
Best for
Decode JSON Web Tokens, inspect claims, and check expiry — fully in your browser.
How to use
Paste a JWT token to decode the header and payload, inspect all claims, and check the expiry status.
What you get
Decoded JWT header and payload with claim details and expiry status.
Test regular expressions live with match highlighting and capture group details
Best for
Test regular expressions live with match highlighting and capture group details.
How to use
Enter a regex pattern and test string to see live match highlighting, groups, and flag options.
What you get
Live match highlights, captured groups, and match positions for your pattern.
Parse cron expressions into plain English and see the next 10 execution times
Best for
Parse cron expressions into plain English and see the next 10 execution times.
How to use
Enter a cron expression to read it in plain English and see the next 10 scheduled execution times.
What you get
A plain-English schedule description and the next 10 execution times for your cron expression.
Check WCAG AA/AAA contrast ratios for text and background colors
Best for
Check WCAG AA/AAA contrast ratios for text and background colors.
How to use
Enter foreground and background color values to see the contrast ratio and WCAG AA/AAA pass or fail result.
What you get
Contrast ratio value with WCAG AA and AAA pass or fail results for your color pair.
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes instantly in your browser
Best for
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes instantly in your browser.
How to use
Type or paste any text to instantly generate SHA-1, SHA-256, SHA-384, and SHA-512 hash outputs.
What you get
SHA-1, SHA-256, SHA-384, and SHA-512 hash outputs ready to copy.
Flatten JSON arrays into a downloadable CSV file
Best for
Flatten JSON arrays into a downloadable CSV file.
How to use
Paste a JSON array, preview the flattened table, then download the result as a CSV file.
What you get
A clear result you can copy, download, or use in your next task.
Parse CSV input into formatted and downloadable JSON
Best for
Parse CSV input into formatted and downloadable JSON.
How to use
Paste CSV data with headers, review the generated JSON, then copy or download the output.
What you get
A clear result you can copy, download, or use in your next task.
Validate, beautify, and convert YAML to JSON instantly
Best for
Validate, beautify, and convert YAML to JSON instantly.
How to use
Paste YAML to validate and beautify it, or convert it to JSON for use in other tools.
What you get
A clear result you can copy, download, or use in your next task.
Convert Unix timestamps to human-readable dates and back
Best for
Convert Unix timestamps to human-readable dates and back.
How to use
Enter a Unix timestamp or a date and time to convert between the two formats with timezone support.
What you get
A clear result you can copy, download, or use in your next task.
Convert between px, rem, and em with a configurable base font size
Best for
Convert between px, rem, and em with a configurable base font size.
How to use
Set a base font size, enter a value in px, rem, or em, and read the equivalent values in all three units.
What you get
A clear result you can copy, download, or use in your next task.
Given one dimension, calculate the other for any ratio
Best for
Given one dimension, calculate the other for any ratio.
How to use
Enter a width and height to find the ratio, or lock a ratio and enter one dimension to get the other.
What you get
A clear result you can copy, download, or use in your next task.
Convert any text or emoji into a downloadable favicon.ico
Best for
Convert any text or emoji into a downloadable favicon.ico.
How to use
Enter a letter, emoji, or short text, choose size and background color, then download the favicon.ico.
What you get
A clear result you can copy, download, or use in your next task.
Preview how a URL's OG tags appear on social media shares
Best for
Preview how a URL's OG tags appear on social media shares.
How to use
Enter OG tag values manually to preview how your page will appear when shared on social platforms.
What you get
A clear result you can copy, download, or use in your next task.
Break down any browser user-agent string into readable parts
Best for
Break down any browser user-agent string into readable parts.
How to use
Paste or auto-detect a user-agent string to see the browser, OS, device type, and engine details.
What you get
A clear result you can copy, download, or use in your next task.
Preview colors as seen with different types of color blindness
Best for
Preview colors as seen with different types of color blindness.
How to use
Enter a color value and select a color blindness type to see how the color appears to affected users.
What you get
A clear result you can copy, download, or use in your next task.
Encode plain text to Base32 or decode Base32 strings back
Best for
Encode plain text to Base32 or decode Base32 strings back.
How to use
Paste text or a Base32 string, choose encode or decode, then copy the converted output.
What you get
A clear result you can copy, download, or use in your next task.
Beautify and format SQL queries
Best for
Beautify and format SQL queries.
How to use
Paste SQL to format it with consistent indentation and keyword casing.
What you get
A clear result you can copy, download, or use in your next task.
Beautify or minify HTML code
Best for
Beautify or minify HTML code.
How to use
Paste HTML and choose beautify or minify to format or compress the output.
What you get
A clear result you can copy, download, or use in your next task.
Format or minify XML documents
Best for
Format or minify XML documents.
How to use
Paste XML and choose beautify or minify to format or compress the output.
What you get
A clear result you can copy, download, or use in your next task.
Generate a .gitignore for your tech stack
Best for
Generate a .gitignore for your tech stack.
How to use
Select one or more tech stacks to generate a combined .gitignore file.
What you get
A clear result you can copy, download, or use in your next task.
Generate 1 to 100 UUIDs in multiple formats
Best for
Generate 1 to 100 UUIDs in multiple formats.
How to use
Choose format and count, then generate and copy UUIDs in bulk.
What you get
A clear result you can copy, download, or use in your next task.
Validate JSON data against a JSON Schema
Best for
Validate JSON data against a JSON Schema.
How to use
Paste JSON data and a JSON Schema to validate structure and constraints.
What you get
A clear result you can copy, download, or use in your next task.
Generate a Dockerfile for common languages and frameworks
Best for
Generate a Dockerfile for common languages and frameworks.
How to use
Select a language and options to get a ready-to-use Dockerfile.
What you get
A clear result you can copy, download, or use in your next task.
Parse and inspect .env file contents
Best for
Parse and inspect .env file contents.
How to use
Paste a .env file to see key-value pairs, types, and potential issues.
What you get
A clear result you can copy, download, or use in your next task.
Build HTTP mock responses for Express, MSW, or JSON Server
Best for
Build HTTP mock responses for Express, MSW, or JSON Server.
How to use
Fill in method, path, status, and body to generate a mock route configuration.
What you get
A clear result you can copy, download, or use in your next task.
Network and API tools help you inspect URLs, look up DNS records, check IP info, and reference common HTTP standards.
Basic workflow
Enter the URL, domain, or value.
Choose the operation or record type.
Review the structured output.
Encode and decode URL components
Best for
Encode and decode URL components.
How to use
Paste a URL or text to encode or decode it instantly.
What you get
A clear result you can copy, download, or use in your next task.
Break a URL into scheme, host, path, and params
Best for
Break a URL into scheme, host, path, and params.
How to use
Paste a full URL to see each component in a structured breakdown.
What you get
A clear result you can copy, download, or use in your next task.
Searchable HTTP status code reference
Best for
Searchable HTTP status code reference.
How to use
Search or browse all HTTP status codes with descriptions and use cases.
What you get
A clear result you can copy, download, or use in your next task.
Common HTTP request and response headers explained
Best for
Common HTTP request and response headers explained.
How to use
Search request, response, and general HTTP headers with descriptions.
What you get
A clear result you can copy, download, or use in your next task.
Query A, CNAME, MX, TXT, and NS records
Best for
Query A, CNAME, MX, TXT, and NS records.
How to use
Enter a domain and select a record type to query live DNS records.
What you get
A clear result you can copy, download, or use in your next task.
Country, ISP, and timezone for any IP address
Best for
Country, ISP, and timezone for any IP address.
How to use
Enter an IP address or use My IP to see geolocation and network details.
What you get
A clear result you can copy, download, or use in your next task.
File extension to MIME type lookup
Best for
File extension to MIME type lookup.
How to use
Search by extension or MIME string to find a matching type.
What you get
A clear result you can copy, download, or use in your next task.
Well-known ports and their services
Best for
Well-known ports and their services.
How to use
Search by port number or service name to find common TCP/UDP ports.
What you get
A clear result you can copy, download, or use in your next task.
Security tools help you generate secure tokens, hash passwords, decode certificates, and scan text for accidentally exposed secrets.
Basic workflow
Enter the value, text, or certificate content.
Choose the operation or algorithm.
Review or copy the output.
Generate time-based one-time passwords
Best for
Generate time-based one-time passwords.
How to use
Enter a base32 secret key to generate live TOTP codes with a 30-second countdown.
What you get
A clear result you can copy, download, or use in your next task.
UUID, API key, CSRF token, and hex strings in bulk
Best for
UUID, API key, CSRF token, and hex strings in bulk.
How to use
Choose a token type and count, then generate and copy all results.
What you get
A clear result you can copy, download, or use in your next task.
Decode a PEM certificate to inspect issuer, expiry, and SANs
Best for
Decode a PEM certificate to inspect issuer, expiry, and SANs.
How to use
Paste a PEM certificate to see subject, issuer, validity dates, and other fields.
What you get
A clear result you can copy, download, or use in your next task.
Hash and verify passwords using PBKDF2-SHA256
Best for
Hash and verify passwords using PBKDF2-SHA256.
How to use
Enter a password to generate a PBKDF2 hash, or verify a password against a stored hash.
What you get
A clear result you can copy, download, or use in your next task.
Measure Shannon entropy and randomness of any string
Best for
Measure Shannon entropy and randomness of any string.
How to use
Paste or type text to see Shannon entropy, character distribution, and strength estimate.
What you get
A clear result you can copy, download, or use in your next task.
Scan code or text for accidentally exposed secrets
Best for
Scan code or text for accidentally exposed secrets.
How to use
Paste code or text to detect API keys, tokens, and other common secret patterns.
What you get
A clear result you can copy, download, or use in your next task.