Every tool you actually need, in one place.
Calculators, image converters, document helpers, text utilities, developer, finance, and security tools — fast, clean, and built to run right in your browser.
Why MondayTool
A growing collection of practical utilities, built to be quick, simple, and respectful of your privacy.
Privacy-first by design
File tools process locally in your browser whenever possible. Your data does not leave your device.
Fast & no sign-up
Open a tool and start using it instantly. No accounts, no installs, no waiting.
Everything in one place
169+ everyday utilities — from calculators to developer and security tools — under one roof.
Completely free
Every tool is free to use, with no hidden limits and no paywalls — ads keep the site free.
What's inside
Tools are organised into clear categories so you always know where to look.
Calculators
30 tools
Precise calculations for everyday needs
Image Tools
21 tools
Convert, resize, and compress images in your browser
Document Tools
9 tools
Convert, create, and compress document files locally
Text Tools
28 tools
Utilities for text, color, security, and quick creation
Developer Tools
44 tools
Formatter, preview, encoding, and comparison utilities
Network & API
8 tools
URL, DNS, IP, and API reference utilities
Security
6 tools
Tokens, hashing, certificate decoding, and secret scanning
Finance
10 tools
Mortgages, currency, tax, and money planning tools
Date & Time
7 tools
Time zones, working days, countdowns, and timers
Health & Fitness
6 tools
Pregnancy, nutrition, training, and wellness calculators
Built around your privacy
File tools process locally in your browser whenever possible, so your files usually never leave your device. Everyday utilities stay quick and simple, with no account to create.