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Regex101
Developer ResourcesAn interactive regex tester with real-time highlighting, explanation, and a library of community patterns.
freeweb
BackendCheatsheetFree
A fast, offline-friendly documentation browser that aggregates API docs for hundreds of languages and tools.
DevDocs brings the documentation for hundreds of technologies into one fast, searchable interface. It loads docs for JavaScript, Python, React, CSS, Node, and hundreds more, with instant fuzzy search across everything. Everything works offline once cached, and the interface strips away clutter so the docs are readable at a glance. Keyboard shortcuts make it blazing to navigate. For developers who live in the docs, DevDocs replaces a dozen open tabs with one clean window. Free, open source, and available as a web app or a standalone app.
An interactive regex tester with real-time highlighting, explanation, and a library of community patterns.
Up-to-date browser support tables for HTML, CSS, and JavaScript features, essential for cross-browser work.
A browser extension that formats, validates, and syntax-highlights JSON in the browser with collapsible trees.
An API development tool that makes it easy to send requests, inspect responses, and organize the endpoints you work with…
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