Bookmarklets
- artoo.js - Client-side scraping utility for the currently loaded uri.
- CSS Stress Test (⭐872) - JavaScript to test each CSS class on a page and report which are hindering performance.
- deCSS3 (⭐312) - A lil' bookmarklet that will strip out your CSS3 rules and show you how gracefully you're degrading.
- DOM Monster - A cross-platform, cross-browser bookmarklet that will analyze the DOM & other features of the page you're on.
- Rulers Guides - A JavaScript library which enables Photoshop-like rulers and guides interface on a web page.
Tools / Debugging & Development
- Beeceptor - Rule based API mocking service. When rules are matched, a request is mocked, else target endpoint is hit as usual. Create custom endpoints to test and debug rest APIs.
- DebugJS - Debug your JavaScript in the browser (lol?)
- Hook.io - Instantly deploy microservices in over 11+ languages (OSS!)
- httpbin - HTTP Request & Response service.
- Loupe - Similar in goal to SlowmoJS, a JavaScript call stack visualizer.
- Mockbin - Generate custom endpoints to test, mock, and track HTTP requests.
- SlowmoJS - Execute JavaScript in slow motion.
Tools / Deobfuscation & Transformation
- AST Explorer - Parse JS to an explorable AST tree via acorn, babel, babylon, espree, esprima, recast, shift, and typescript.
- fixmyjs - Automatically fix your JS, driven by JSHint.
- JSNice - Statistical renaming, type inference and deobfuscation.
Tools / Diffing
- JSONDiffPatch - Run a visual or non-visual diff on two JSON blobs.
Tools / File Sharing
- file.io - Ephemeral file sharing. Convenient, anonymous and secure.
- instant.io - Instant file transfer/sharing over WebTorrent
Tools / Generators
Tools / Image
- Favic-o-matic - Literally generates every favicon neccessary + markup.
- Squoosh - Compress and optimize images in browser
Tools / Playgrounds
- codepen - Social development environment for front-end designers and developers. Build and deploy a website, show off your work, build test cases to learn and debug, and find inspiration.
- Ellie - The Elm Live Editor
- JSBin - JS/Coffee/Babel/Babel/Live/JSX/HTML/Markdown/Pug/CSS/Stylus/LESS/Sass
- playcode.io - JS/Typescript/Coffee/LiveScript/Babel/CSS/Sass/LESS/Stylus/HTML/Pug
Tools / Regex
- Debuggex - PCRE/Python/JavaScript regex matching.
- reFiddle - Ruby/.NET/JavaScript regex matching.
- Regexr - JavaScript regex matching.
Tools / Transformation
- Terser - JavaScript parser, mangler and compressor toolkit for ES6+
- WebAssembly Explorer - translate C/C++ to WebAssembly, and then see the machine code generated by the browser.
Resources / Browser Information
Resources / Compatability
Resources / CSS Inliners
Resources / CSS Post Processors
Resources / Documentation
- DevDocs - Basically Dash but a web application and FREE.
Resources / Easings & Animations
Resources / Glyphs & Icons
Resources / Open JSON & Feeds
- FillText - Generate JSON datasets for testing or demonstration purposes
Resources / Proxy as a Service
- CORS Anywhere - Proxies any HTTP request through a CORS enabled environment.
Resources / Responsiveness
Resources / Validation & Parsers
- numverify - Validate phone numbers from over 200 countries.
Security / SSL
The Outside World / Swag
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