Tools for web development available as a plugin for Firefox. Firefox also now has its own developer tools: choose Web Developer from the Tools menu.
Developer tools for Internet Explorer.
Documentation, tutorials and help
Great place to start with computer science.
Gentle introduction to web technologies â in a good-looking online âbookâ.
Well-written introductory article.
Great place to ask (and find high quality answers to) web-related questions. If you have a question, make sure to search first in case itâs already been asked.
Comprehensive, up-to-date list of elements, attributes and events, with examples.
Default styles for HTML elements.
Mozilla Developer Network: demos, tutorials and reference documentation, with contributions from Google staff.
Cross-industry effort to build web documentation.
One-of-a-kind, well-written how-to and history for everything HTML5.
Best practice for multi-device web development.
âFor all your browser quirksâ. In depth articles on a range of topics.
Reference documentation by a respected book publisher.
In-depth articles about CSS.
Multi-device web design, tools and techniques.
A gold mine: links to resources, each categorised and rated.
Site built by Googler Paul Kinlan to search reputable web documentation
…and remember: standards and specifications are also documentationâsee below for links.
Bento is a guided tour through the best free web development tutorials, including videos, interactive classes, and reading material. It is particularly good at teaching you what to learn in what order.
Mobile and desktop browser capabilities, with links to documentation.
Web platform feature support and examples.
Want to know whatâs coming to Chrome? Blink is Chromiumâs rendering engine.
Internet Explorer status and roadmap
Capability information for mobile browsers.
Tests your browserâs CSS3 support.
Comparison of statistics from various sources.
Charts of browser share organised by territory, platform, browser version and other metrics.
Trends in web technology, interesting stats, website performance.
Archive of over 400 billion web pages.
Online code editors
Edit and publish web pages online â from the creators of Firefox.
A good place for absolute beginners.
Validators, code checkers, tools…
HTML validation tool.
CSS validation tool.
Open source tool for formatting CSS, from Sencha Labs.
Google tool to âhelp developers optimize their web pages by applying web performance best practicesâ. Now with UX and mobile testing.
Cross browser page load testing.
Create, share and compare test cases.
Libraries, package managers, development stacks…
âModern workflows for modern webapps.â
Feature detection library.
âThe Closure Tools project is an effort by Google engineers to open source the tools used in many of Google’s sites and web applications for use by the wider Web development community.â
CSS variables, inheritance, mixins and more.
Cross-browser CSS library.
Conditional resource loader.
Cross browser HTML5 web app frameworks.
Web app framework.
Specs and standards
HTML, CSS and all that.
âThe HTML Living Standardâ.
by David Flanagan
An actual printed book! Classic reference, highly readable.
by Marijn Haverbeke (online or print)
by Steve Krug
Another book! The best ever guide to interface design.
by Douglas Crockford
by Mark Meyers
Really great introduction to the language that is paired with online exercises to help retention.
You Don’t Know JS: Scope & Closures
by Kyle Simpson