React Developer Tools
Developer ToolsFree
Inspect React component trees, props and state.
3.91,600 reviews5M+
View Extension3 extensions
Best Developer Tools Chrome Extensions
Developer extensions extend DevTools with framework inspection, API clients and accessibility checks.
All Developer Tools extensions
Wappalyzer
Developer ToolsFreemium
Identifies the technology stack behind any website.
4.62,000 reviews3M+
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JSON Formatter
Developer ToolsFree
Makes raw JSON responses readable in the browser.
4.32,100 reviews2M+
View ExtensionRelated categories
Developer Tools comparisons
Side-by-side pages for the pairs people compare most in this category.
Wappalyzer vs JSON FormatterStack detection for recon work against readable API responses in the browser.React Developer Tools vs WappalyzerBoth are developer tools extensions people shortlist together — see how ratings, install base, pricing and day-to-day use differ.React Developer Tools vs JSON FormatterBoth are developer tools extensions people shortlist together — see how ratings, install base, pricing and day-to-day use differ.All comparisonsEvery head-to-head comparison, grouped by category.
Shortlists and alternatives
Best Productivity Chrome ExtensionsTen productivity Chrome extensions worth installing, with live Chrome Web Store ratings and install counts, honest trade-offs and a permissions checklist.Best AI Chrome ExtensionsThe AI Chrome extensions worth a permission grant, grouped by the job they do: answering, summarising, writing and archiving. Live store ratings and honest limits.Best SEO Chrome ExtensionsSeven SEO Chrome extensions that answer a question faster than a dashboard: on-page audits, keyword overlays and competitor stacks, with accuracy caveats.Wappalyzer alternativesClosest replacements for Wappalyzer.JSON Formatter alternativesClosest replacements for JSON Formatter.React Developer Tools alternativesClosest replacements for React Developer Tools.
Frequently asked questions
What is the best developer tools Chrome extension?
Wappalyzer currently leads this category on rating and review volume, but the right choice depends on whether you need developer tools features for personal or team use.
Are there free developer tools extensions?
Yes — 2 of the 3 extensions in this category are free, and several more offer a usable free tier.
How are these extensions ranked?
By install base and rating, with editorial notes on trade-offs.