Developer toolsWeb Developer
A broad toolbar of page inspection and manipulation utilities
4.5View review
Build, inspect, debug
Developer tools
Extensions for inspecting pages, debugging frameworks, and auditing markup, performance, and accessibility.
Current pick
React Developer Tools — best framework debugging. See the full ranked guide.
Developer tools
Developer toolsLighthouse
Auditing web performance, accessibility, SEO, and best practices
4.4View review
Developer toolsRedux DevTools
Tracing Redux actions and state changes over time
4.6View review
Developer toolsWappalyzer
Identifying the technology stack behind any website
4.6View review
Developer toolsVisBug
Visually inspecting and experimenting with a live page layout
4.8View review
Developer toolsWAVE Evaluation Tool
Auditing a page's accessibility issues where they appear
4.1View review
Developer toolsRefined GitHub
Dozens of quality-of-life fixes layered onto GitHub
4.8View review
Developer toolsOctotree
Browsing large GitHub repositories with an IDE-style file tree
4.9View review
Developer toolsColorZilla
Sampling page colors and building quick CSS gradients
4.6View review
Developer toolsReact Developer Tools
Inspecting React component trees, props, state, and renders
4.0View review
Developer toolsJSON Formatter
Making raw JSON responses readable in the browser
4.3View review
Developer toolsaxe DevTools
Running accessibility checks inside browser developer tools
3.8View review
Developer toolsVue.js devtools
Inspecting Vue component trees, state, and events
4.1View review