Developer tools, curated for working devs

Beautiful, accessible modals built with pure CSS and enhanced with JavaScript. Multiple styles, sizes, and animation options.

by drublic

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

by eltos

Paste raw JSON and get clean, formatted output instantly.

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

A tiny live Markdown previewer — type Markdown on the left, see formatted HTML on the right. Ultra-lightweight at under 5KB.

by SimonWaldherr

Create entire web pages stored in a URL — write HTML, CSS, and JavaScript, then share as a single link. No server needed, everything lives in the address bar.

by jstrieb

A clean, minimal ChatGPT interface built with pure JavaScript. Chat with OpenAI models in a simple, distraction-free browser UI.

by xqdoo00o

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

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

by Yqnn

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

by GCHQ

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

by Jason Tally

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

by 1j01

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

by Rabbit-Company

Encode and decode Base64 text instantly in the browser.

by progers

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

by Launch Arcade

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

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

by sql-formatter-org

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

by ItzBlueSword

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

by cbracco

Visualize JSON as an expandable tree structure.

by Launch Arcade

A starter template for creating generative art, visualizations, and interactive demos using the Pts.js library. Includes build tools and supports both JavaScript and TypeScript.

by williamngan

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

by kazzkiq

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

by openexchangerates

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

by xxjapp

A complete starter template for creating browser-based roguelike games with level generation, inventory systems, and mobile-friendly controls.

by chr15m

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

by SheepTester