Developer tools, curated for working devs

A page displaying every standard HTML5 element. Great for testing CSS themes, browser rendering, and learning HTML5 tags.

by cbracco

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

by Jason Tally

Convert Scratch projects into standalone HTML files. Upload a Scratch project and download a self-contained web page you can share.

by SheepTester

Design color gradients and export to CSS, SVG, Python, and more. Shareable via URL.

by eltos

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

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

Visualize JSON as an expandable tree structure.

by Launch Arcade

Write HTML, CSS, and JavaScript with instant live preview. A lightweight CodePen-style editor in your browser.

by ItzBlueSword

A beautiful, lightweight dialog and modal library demo. See alerts, confirms, prompts, and custom dialogs with smooth animations.

by xxjapp

A collaborative platform where developers worldwide can showcase and discover diverse coding projects across web development, mobile apps, machine learning and more.

by MrAshwin2142

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

by SteffenHebestreit

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

by sql-formatter-org

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

by GCHQ

Paste raw JSON and get clean, formatted output instantly.

by Launch Arcade

JavaScript API client library for Passky password management services. Provides developers with tools to integrate password management functionality into web applications.

by Rabbit-Company

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

by 1j01

An interactive JavaScript console. Type JavaScript, see results instantly. Perfect for experimenting and learning.

by openexchangerates

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

by kazzkiq

Compress JSON into ultra-short URL-friendly strings. Paste JSON, get a crushed version you can share in URLs or query params.

by KilledByAPixel

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

by Launch Arcade

Encode and decode Base64 text instantly in the browser.

by progers