Free & Open Source

The Awesome Online Tools

A collection of free, fast, and beautiful developer tools. Built with modern web technologies, inspired by the community.

Created by @1chooo, inspired by @tszhong0411

Editor

Preview and edit markdown in real-time

Automatically add spaces between CJK and half-width characters

Calculate compound interest with detailed breakdown

Calculate CIDR notation and subnet information

Create professional email signatures

Generate beautiful GitHub profile READMEs

Extract and view EXIF metadata from images