Stoplight
Best freeChecked 2h agoLink OKFree plan available
Why it wins
Design and document APIs with visual tools and auto-generated references.
When not to use
API-first approach; less for general code docs.
verified tools
Free AI tools for Write code documentation
Every tool listed here offers a free tier or freemium plan. No credit card required. · 422 reads
Free options
Swagger AI
Best overallChecked 2h agoLink OKFree plan available
Why it wins
Standard API documentation format with automatic client generation.
When not to use
Requires OpenAPI setup.
Postman AI
Best for teamsChecked 2h agoLink OKFree plan available
Why it wins
AI-powered API documentation with automatic endpoint discovery.
When not to use
API documentation focus only.
Comparison
| Tool | Pricing | Verified | Link |
|---|---|---|---|
| Stoplight | Free plan available | Checked 2h ago | Try → |
| Swagger AI | Free plan available | Checked 2h ago | Try → |
| Postman AI | Free plan available | Checked 2h ago | Try → |