C
Calcify

Command Palette

Search for a command to run...

65+ Free Tools — No Sign-up Required

Free Online Calculators & Developer Tools

65+ free tools that work entirely in your browser. No sign-up, no data collection, no limits.

Search tools...
⌘K

Command Palette

Search for a command to run...

Popular:Tip CalculatorAge CalculatorCalorie CalculatorRegex Tester & DebuggerUnit Converter

No sign-up required

Start using any tool instantly

Works offline

All tools run in your browser

Your data stays private

Network tools only contact the server when needed

Free forever

No limits, no paywalls

Featured Tools

Our most popular tools loved by millions of users.

Calculator

BMI Calculator

Calculate your Body Mass Index (BMI) and understand your weight category with visual charts.

Open tool
Dev Tool

JSON Formatter & Validator

Format, beautify, minify, and validate JSON data with syntax highlighting and error detection.

Open tool

Browse by Category

Find the perfect tool from our organized collection.

All Tools

Explore our complete collection of 65 free tools.