HTTP Status Codes
Developer ResourcesA plain-language reference for every HTTP status code, from 200 to 599, with quick explanations.
40 resources · Page 1 of 2
A plain-language reference for every HTTP status code, from 200 to 599, with quick explanations.
Up-to-date browser support tables for HTML, CSS, and JavaScript features, essential for cross-browser work.
An interactive regex tester with real-time highlighting, explanation, and a library of community patterns.
An enormous index of programming cheatsheets gathered from across the web into one searchable page.
The open-source foundation's guides and checklists for building and securing software against common attacks.
A fast, offline-friendly documentation browser that aggregates API docs for hundreds of languages and tools.
An open marketplace for indie games where creators set their own prices, from free experiments to polished releases.
A rhythm-based platformer where you jump through geometric obstacle courses synced to music.
A farming life-simulator where you restore a rundown farm, build relationships, and uncover the town's secrets.
The open-source tool that turns OpenAPI specs into interactive, self-documenting API pages.
A desktop API client for designing, testing, and debugging REST and GraphQL APIs with a clean UI.
A lightweight, open-source API testing tool that runs entirely in the browser with a clean workspace.
The official API for automating GitHub — repos, issues, PRs, releases, and actions — from your own scripts.
A developer-friendly payments API with clean documentation, libraries for every language, and instant webhooks.
An open-source browser extension that automatically skips sponsor segments and other non-content parts of YouTube videos…
A developer news homepage extension that surfaces the best articles from the community in a clean feed.
A browser extension that formats, validates, and syntax-highlights JSON in the browser with collapsible trees.
The official browser extension for inspecting React component trees, props, state, and performance.
A browser extension that instantly reveals the technologies powering any website you visit.
A smart bookmark manager that organizes links into collections with tags, search, and a beautiful interface.
A browser extension that generates a dark theme for every website, complete with brightness and contrast controls.
An efficient, open-source ad blocker that removes ads and trackers with minimal impact on page load speed.
A free, open-source audio editor for recording, editing, and mixing audio with a straightforward workflow.
A music streaming service with millions of tracks, smart playlists, and podcast support that follows you across every de…
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