Awesome Developer Tools

▐ A curated list of in-browser bookmarklets (#bookmarklets), tools (#tools), and resources (#resources) for modern full-stack software engineers.

Inspired by the awesome (https://github.com/sindresorhus/awesome) list thing.

Bookmarklets

- artoo.js (https://medialab.github.io/artoo/) - Client-side scraping utility for the currently loaded uri.
- DOM Monster (http://mir.aculo.us/dom-monster/) - A cross-platform, cross-browser bookmarklet that will analyze the DOM & other features of the page you're on.
- Make Bookmarklets (https://make-bookmarklets.com) - Online tool to turn JavaScript into a bookmarklet.
- Rulers Guides (http://mark-rolich.github.io/RulersGuides.js/) - A JavaScript library which enables Photoshop-like rulers and guides interface on a web page.
- Viewport Resizer (http://lab.maltewassermann.com/viewport-resizer/) - A browser-based tool to test any website's responsiveness.

Web-based Tools

Debug JavaScript

- Babel Time Travel (https://babel-time-travel.boopathi.in/) - Travel in time as babel transpiles.
- DebugJS (http://debugjs.com/) - Debug your JavaScript in the browser (lol?)
- endpoints.dev (https://www.endpoints.dev) - View realtime HTTP requests using a endpoints.dev generated URL.
- httpbin (http://httpbin.org/) - HTTP Request & Response service.
- JavaScript Visualizer 9000 (https://www.jsv9000.app) - Loupe-inspired JavaScript execution visualizer
- JSONBIN.io (https://jsonbin.io/quick-store) - Custom, mock JSON API
- Loupe (http://latentflip.com/loupe/) - Similar in goal to SlowmoJS, a JavaScript call stack visualizer.
- SlowmoJS (http://toolness.github.io/slowmo-js/) - Execute JavaScript in slow motion.

Postman Alternatives
- Hoppscotch (https://hoppscotch.io) - A lightweight, web-based API development suite.
- RecipeUI (https://recipeui.com/editor) - Open source Postman alternative with type safety built in.
- Reqbin (https://reqbin.com) - REST & SOAP API Online Testing Tool

Diagramming & Scratch

- asciiflow (https://asciiflow.com) - ASCIIFlow is a client-side only web based application for drawing ASCII diagrams.
- dbdiagram (https://dbdiagram.io/d) - Draw Entity-Relationship Diagrams, Painlessly.
- dot-to-ascii (https://dot-to-ascii.ggerganov.com) - Graphviz to ASCII converter using Graph::Easy.
- Excalidraw (https://excalidraw.com) - Virtual whiteboard.
- JSON-to-Chart (https://jsontochart.com) - Create beautiful charts from JSON data in your browser.
- JSONCrack (https://jsoncrack.com/editor) - Visualize CSV/JSON/TOML/XML/YAML instantly into graphs.
- Markmap (https://markmap.js.org/repl) - Visualize markdown as a feature-rich mindmaps.
- nomnoml (https://nomnoml.com) - A tool for drawing UML diagrams based on a simple syntax.
- Sequence Diagram (https://sequencediagram.org) - An online tool / software for creating UML sequence diagrams.

Diffing

- JSONDiffPatch (https://benjamine.github.io/jsondiffpatch) - Run a visual or non-visual diff on two JSON blobs.

Document & Editors

- README.so (https://readme.so/editor) - A simple editor to quickly add and customize all the sections you need for your project's readme.

Generators

- JSONGenerator (https://www.jsongenerator.io) - Create random JSON data
- NGINXConfig (https://www.digitalocean.com/community/tools/nginx) - The easiest way to configure a performant, secure, and stable NGINX server.
- Readme (https://nxt-readme.vercel.app) - All in one tool to quickly generate a readme for your project or github profile.

Image

- Clippy (https://bennettfeely.com/clippy) - CSS clip-path maker and editor.
- Favic-o-matic (http://www.favicomatic.com/) - Literally generates every favicon neccessary + markup.
- JPEG.rocks (https://jpeg.rocks) - Privacy-aware JPEG optimizer
- PicPerf (https://www.picperf.dev/analyze) - Boost web performance with image optimization. Analyze and improve  tags, and inline CSS.
- PNG-to-SVG (https://png-to-svg.com) - Free conversion from JPG or PNG images To vectorized SVG.
- Squoosh (https://squoosh.app/) - Compress and optimize images in browser
- SVG-to-backgroundImage (https://csspro.com/svg-to-background-image-css) - Convert your SVG files into CSS url (data URIs) by encoding it.
- SVGOMG (https://jakearchibald.github.io/svgomg/) - Try SVGO (https://github.com/svg/svgo) (SVG Optimizer) in the browser!

Web-based Services

Copy/Paste Scripts & Styles

- crontab guru (https://crontab.guru/) - The quick and simple editor for cron schedule expressions by Cronitor
- CSS Scan - Box Shadows (https://getcssscan.com/css-box-shadow-examples) - CSS, Ready to use, click to copy
- CSS Scan - Buttons (https://getcssscan.com/css-buttons-examples) - CSS, Ready to use, click to copy
- CSS Scan - Checkboxes (https://getcssscan.com/css-checkboxes-examples) - CSS, Ready to use, click to copy
- CSS Scan - Shapes (https://getcssscan.com/css-shapes) - CSS, Ready to use, click to copy
- Devtools Tips (https://devtoolstips.org) - Copy-and-paste'able collection of useful cross-browser DevTools snippets.
- transition.css (https://www.transition.style) - Drop-in CSS transitions

File Sharing

- file.io (https://www.file.io) - Ephemeral file sharing. Convenient, anonymous and secure.
- instant.io (https://instant.io) - Instant file transfer/sharing over WebTorrent
- pairdrop (https://pairdrop.net) - Instant file transfer over your local network (P2P)

Performance

- Perflink (https://perf.link) - JS benchmarks

Playgrounds

- codepen (http://codepen.io/pen) - 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.
- CodeSandbox (https://codesandbox.io/s/new) - Online code editor and sandbox
- Ellie (https://ellie-app.com/) - The Elm Live Editor
- ES.nextBin (http://esnextb.in/) - Like RequireBin but ES2015
- ESM (https://code.esm.sh) - A fast, smart, & global CDN for modern(es2015+) web development.
- JSBin (http://jsbin.com/) - JS/Coffee/Babel/Babel/Live/JSX/HTML/Markdown/Pug/CSS/Stylus/LESS/Sass
- JSFiddle (http://jsfiddle.net/) - JS/ES3/Coffee/HTML/CSS/Sass
- playcode.io (https://playcode.io/new) - JS/Typescript/Coffee/LiveScript/Babel/CSS/Sass/LESS/Stylus/HTML/Pug

Regex

- Debuggex (https://www.debuggex.com/) - PCRE/Python/JavaScript regex matching.
- ExtendsClass (https://extendsclass.com/regex-tester.html) - PHP/Python/Ruby/JavaScript regex matching.
- RegExplained (http://leaverou.github.io/regexplained/) - JavaScript regex matching.
- Regexr (http://www.regexr.com/) - JavaScript regex matching.
- Regulex (https://jex.im/regulex) - JavaScript Regular Expression Visualizer.

Transformation

- AST Explorer (http://astexplorer.net/) - Parse JS to an explorable AST tree via acorn, babel, babylon, espree, esprima, recast, shift, and typescript.
- Babel REPL (https://babeljs.io/en/repl) - The compiler for next generation JavaScript
- Compiler Explorer (https://godbolt.org) - Run compilers interactively from your web browser and interact with the assembly
- fixmyjs (http://goatslacker.github.io/fixmyjs.com/) - Automatically fix your JS, driven by JSHint.
- JavaScript Deobfuscator (https://deobfuscate.io) - A simple but powerful deobfuscator to remove common JavaScript obfuscation techniques.
- JSNice (http://www.jsnice.org/) - Statistical renaming, type inference and deobfuscation.
- JSON ABC (https://novicelab.org/jsonabc/) - Sorts JSON alphabetically
- Markdown to HTML (https://markdowntohtml.com) - Paste or type your markdown and see it rendered as HTML. Download or copy the resulting HTML.
- Markdown Tools (https://markdowntools.com) - Tools to convert Markdown to/from a number of formats. E.g. Html to Markdown, or a CSV to a Markdown table.
- Sassmeister (http://sassmeister.com/) - Sass/Scss  CSS
- Sucrase (https://sucrase.io) - Super-fast Babel alternative
- SWC (https://swc.rs/playground) - compile JS/TS files using modern JS features and outputs valid code that is supported by all major browsers.
- Terser (https://try.terser.org/) - JavaScript parser, mangler and compressor toolkit for ES6+
- Web2Img (https://etherdream.com/web2img) - A tool to bundle your web files into a single image, and extract them via Service Worker at runtime.
- WebAssembly Explorer (https://mbebenita.github.io/WasmExplorer/) - translate C/C++ to WebAssembly, and then see the machine code generated by the browser.


Presentation

- Ray.so (https://ray.so) - Create beautiful images of code snippets.
- snapify (https://snappify.com/editor) - Snappify enables you to create stunning presentations, with first-class support for code snippets.

Resources

APIs

- FillText (http://filltext.com/) - Generate JSON datasets for testing or demonstration purposes
- JSONPlaceholder (https://jsonplaceholder.typicode.com) - Free fake API for testing and prototyping.
- Zippopotamus (http://zippopotam.us/) - Zipcode to Geo

Browser Information

- What's My Browser? (http://www.whatsmybrowser.org/)

CDN

- JSDelivr (https://www.jsdelivr.com) - A free CDN for open source projects.
- Skypack (https://www.skypack.dev) - Load optimized npm packages with no install and no build tools.
- unpkg (https://www.unpkg.com) - Fast, global content delivery network for everything on npm.

Cheat Sheets

- OWASP Cheat Sheet Series (https://cheatsheetseries.owasp.org) - A concise collection of high value information on specific application security topics.

CSS Inliners

- Campaign Monitor (https://www.campaignmonitor.com/resources/tools/css-inliner)
- MailChimp (http://templates.mailchimp.com/resources/inline-css)

Documentation

- DevDocs (http://devdocs.io/) - Basically Dash (https://kapeli.com/dash) but a web application and FREE.
- ECMAScript Proposal Stages (https://www.proposals.es/stages)
- ExplainShell (https://explainshell.com/explain?cmd=ls+-lisah) - A better way to read MAN pages.

Easings & Animations

- Ceaser (http://matthewlein.com/ceaser/)

Glyphs & Icons

- Copy/Paste Character (http://copypastecharacter.com) - Copy & Paste emojis and unicode symbols
- CSS Icons (https://cssicon.space) - Copy & Paste icons in CSS + transition animations!
- Entity Lookup (http://entity-lookup.leftlogic.com) - Enter any character(s) and find its corresponding HTML entity code.
- heroicons (https://heroicons.com) - Beautiful hand-crafted SVG icons, by the makers of Tailwind CSS.
- Icon Finder (https://www.iconfinder.com) - Millions of graphics for your design projects. Created by independent designers.
- Icon Monstr (http://iconmonstr.com) - Discover 4000+ free icons in 300+ collections.
- Icônes (https://icones.js.org/collection/all) - Over 150,000 open source vector icons.
- Tabler Icons (https://tablericons.com) - 4000+ Open source free SVG icons. Highly customizable. No attribution required. For commercial use.

Proxy as a Service

- CORS Anywhere (https://cors-anywhere.herokuapp.com/) - Proxies any HTTP request through a CORS enabled environment.

Responsiveness

- Responsive Patterns (http://bradfrost.github.io/this-is-responsive/patterns.html)

Validation & Parsers

- numverify (https://numverify.com/) - Validate phone numbers from over 200 countries.
- CSP Evaluator (https://csp-evaluator.withgoogle.com) - Evaluate CSP rules
- Ada URL Parser (https://playground.ada-url.com/?url=torrent://blog/post/1?source|rest=rss) - WHATWG-compliant and fast URL parser written in modern C++, online.

Security

SSL

- GetHTTPSForFree! (https://gethttpsforfree.com/) - Genuinely FREE SSL certificates (courtesy of Let's Encrypt (https://letsencrypt.org/))
- Self-Signed Certificate Generator (http://selfsignedcertificate.com/) - A self-signed certificate generator.
- Mozilla SSL Configuration Generator (https://ssl-config.mozilla.org) - SSL configuration generator for various server software and platforms.

Test

- HSTS Preload (https://hstspreload.org) - Check HSTS preload status and elibility.
- Mozilla Observatory (https://observatory.mozilla.org) - A set of tools to analyze your website and inform you if you are utilizing the many available methods to secure it.
- Security Headers by Probely (https://securityheaders.com/?q=https%3A%2F%2Fsecurityheaders.com) - An easy to use tool designed to help you better deploy and understand modern security features that are available for your website.
- Web Check (https://web-check.xyz) - All-in-one OSINT tool for analysing any website.

The Outside World

Swag

- DevSwag (http://devswag.com/)
- DevSwag (http://devswag.com/)
- StickerMule (https://www.stickermule.com/marketplace/collections/open-source-stickers/)

License

!CC0 (http://i.creativecommons.org/p/zero/1.0/88x31.png) (http://creativecommons.org/publicdomain/zero/1.0/)