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
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.
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 or as an overlay
Best for
Combine two images side by side 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.
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.
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.