DevDocs
FreeOffline API documentation browser with 100+ languages and frameworks. Combines MDN, React, Node.js, Python docs into one fast, searchable interface. Works completely offline.
How to install DevDocs as a PWA
Frequently asked questions about DevDocs
What makes DevDocs different from MDN or official docs?
DevDocs aggregates 100+ documentation sources into a single search bar with sub-50ms fuzzy results, so you do not switch tabs between MDN, the React docs and the Python stdlib. Each doc set is downloaded into IndexedDB on first use, so subsequent queries are fully offline. Official sites give you the canonical version but require an internet connection, browser tab juggling and per-site search UIs. DevDocs is a developer-productivity layer on top of the same content, optimized for speed and keyboard navigation.
Is DevDocs free?
DevDocs is 100% free with no paid tier, no ads and no account required. The project is MPL-2.0 licensed and the source code lives on GitHub under freeCodeCamp/devdocs. You can self-host the Rails app on a $5 VPS if you want a private instance with custom doc sets. The hosted version at devdocs.io is donation-supported and covered by FreeCodeCamp's nonprofit umbrella, so there is no upsell pressure.
How does DevDocs compare to Zeal or Dash?
Dash (macOS, paid one-time $30) and Zeal (cross-platform, free) are native desktop equivalents using the same docset format. They handle more docsets (200+) and integrate deeper into IDEs (Alfred, Raycast, VSCode). DevDocs is browser-based, lighter to install and works on Linux, ChromeOS and mobile. If you live in JetBrains or VSCode and want IDE-pop-up docs, Dash or Zeal are stronger. If you want a single PWA that works on every device including a Chromebook, DevDocs is the better fit.
Can DevDocs really work offline?
Yes — DevDocs is one of the cleanest offline PWAs on the web. After enabling a docset (Preferences → Enable), the full content is downloaded into IndexedDB, often 5-50 MB per docset. Once cached, search and rendering work with no network. The service worker also caches the application shell, so cold-loads work offline too. You can enable 20+ docsets in a single browser profile and still keep total storage under 500 MB.
Is DevDocs used in production / by professional developers?
DevDocs has been a staple developer tool since 2013 and is recommended in onboarding documents at many engineering teams as a fast reference layer. It is mentioned in the freeCodeCamp curriculum, in numerous 'developer setup' GitHub repos and in popular dotfiles. There is no telemetry, but the project has 30,000+ GitHub stars and the public instance serves millions of pageviews per month according to Cloudflare radar-style mentions in maintainer blog posts.
Where DevDocs is heading (12-24 months)
- →Tighter IDE integration (VSCode extension or Raycast plugin) would close the gap with Dash.
- →AI-powered semantic search across docsets is an obvious upgrade — current search is fuzzy lexical only.
- →Expanding the catalogue to cover modern frameworks like Astro, SvelteKit 2 and Tauri faster after their releases would lock in the next generation of users.
Related questions
ChatGPT, Perplexity and Gemini usually suggest these next.
- How do I enable additional docsets in DevDocs?
- Can I self-host DevDocs on my own server?
- Does DevDocs integrate with VSCode or JetBrains IDEs?
- How often are docsets updated in DevDocs?
- How do I add a custom or private docset to DevDocs?
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