ColorZilla
Advanced Eyedropper, Colour Picker, Gradient Generator and other colourful goodies
JSON formatter, URL params parser, Markdown preview & HTML beautifier. EN/中文.
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FE Dev Tools (Front-End Development Toolbox) is a browser-based toolbox built for front-end developers. It bundles three everyday utilities into one clean interface:
JSON Formatter
Paste any JSON and instantly get a syntax-highlighted, collapsible tree view. Supports custom indentation, one-click copy, and automatic recursive parsing of JSON nested inside strings.
URL Params Parser
Paste a URL or query string to break search params into a readable key-value tree. Nested JSON values are recursively expanded — no more manual decoding.
Markdown Preview
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Review related products from the Chrome Web Store detail page.
Advanced Eyedropper, Colour Picker, Gradient Generator and other colourful goodies
The Tag Assistant extension works with Tag Assistant to help troubleshoot installation of gtag.js and Google Tag Manager.
Spoofs & Mimics User-Agent strings.
Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps.
Adds a toolbar button with various web developer tools.
Instant website analysis, AI traffic insights, and SEO metrics at your fingertips.