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Zeal vs DevDocs: catalog facts
Zeal	DevDocs
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Best for: Search downloaded programming documentation without going online	Best for: Searchable, offline-capable browser for hundreds of API documentation sets
Free The open-source application is available without a license fee.	Free The open-source application is available without a license fee.
Windows, Linux	Web, Self-hosted
Searchable offline documentation collections	One search box across every documentation set you enable Works offline once documentation sets are downloaded
Docsets must be downloaded before offline use.	Documentation sets lag their upstream sources Only covers the projects the community has packaged
Downloadable app	Web application, Self-hosted
Open source	Open source
License: GPL-3.0	License: MPL-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for Zeal github.com/zealdocs/zeal Catalog checked September 22, 2026	Official website Full listing and sources Sources for DevDocs devdocs.io github.com/freeCodeCamp/devdocs Catalog checked September 22, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.

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