Top Open Source API Documentation Generators Tools in 2026
A curated collection of the 3 best free and open-source API Documentation Generators tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.
Scalar
Open-source API documentation & SDK platform
Stars16,004Last commit10d agoLicenseMITKeePassXC
Offline password manager with auto-fill
Stars28,556Last commit13d agoLicenseOpen SourceFirecamp
All-in-one platform for API testing, documentation, and collaboration, simplifying the entire API development lifecycle.
Stars2,608Last commit6mo agoLicenseAGPL-3.0
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Showing 3 of 3 open-source tools