Developer tools, curated

Learn how Git really works — visually. Build real Git commands by tapping (no typing) and watch a live commit graph branch, merge, and rebase in real time. A guided 17-lesson curriculum takes you from your first commit to untangling diverged branches, plus Practice, Sandbox, and a Daily puzzle.

by Mercutio

Compare two blocks of text side-by-side with highlighted differences. Your text never leaves the browser.

by Jason Tally

Turn JavaScript code into draggable bookmarklets instantly. Paste your code, get a ready-to-use bookmarklet link you can drag to your browser toolbar.

by caiorss

A visual editor for creating and manipulating SVG paths. Click to add points, drag to adjust curves, and export clean SVG code.

by Yqnn

Test regular expressions with live highlighting. See matches, groups, and flags in real-time.

by Launch Arcade

A browser-based life simulation game where you play as a developer. Make career choices, manage your skills, and try to succeed in the tech industry.

by naoxink

Generate harmonious color schemes using the OKLCH color model with CSS variable output.

by SteffenHebestreit

Paste HTML and get clean Markdown output instantly. A live converter for turning web content into readable, portable Markdown text.

by stonehank

Paste raw JSON and get clean, formatted output instantly.

by Launch Arcade

Convert between binary, decimal, octal, and hexadecimal number systems.

by Launch Arcade

The Cyber Swiss Army Knife: encoding, hashing, encryption, compression, and hundreds more operations.

by GCHQ

A tiny, elegant code editor for the browser with syntax highlighting. Write and edit code in a clean, minimal interface.

by kazzkiq

Test your knowledge of JavaScript's tricky == operator. Fill in the equality table by guessing which comparisons return true — a fun challenge for developers.

by slikts

Edit, format, validate, and explore JSON with tree and code views.

by Launch Arcade

Pretty-print SQL queries with support for MySQL, PostgreSQL, and many other dialects.

by sql-formatter-org

An elegant browser-based command-line console. Type commands, see output, and build interactive terminal-style experiences in the browser.

by 1j01

Encode and decode Base64 text instantly in the browser.

by progers