Calculators Finance Dev Tools Generators Images Timers All Tools

Stopwatch

Precise timing with lap tracking and performance comparison.

00:00.00

Free, private, browser-only tools for everyday needs.

© 2026 JustTools

Browse all tools

Percentage Calculator
Age Calculator
BMI Calculator
Tip Calculator
Date Calculator
View all calculators

Compound Growth
Net Worth Calculator
Retirement Calculator
Mortgage Affordability
Mortgage Payoff
View all finance

Printable Generator
QR Code Generator
Password Generator
UUID / ULID Generator
Hash Generator
View all generators

Image Resizer
Image Compressor

Developer Tools

JSON Formatter
Color Converter
Regex Tester
Markdown Previewer
Base64 Encoder / Decoder
View all developer tools

Word Counter

Timer
Stopwatch
Pomodoro Timer

Browser-only tools. Inputs are not stored or transmitted. · Analytics on · Privacy Policy