OpenAPI Formatter pretty-prints or minifies OpenAPI and Swagger JSON in the browser. YAML is not fully supported; only text that parses as JSON is accepted.
What OpenAPI Formatter does
Formats OpenAPI JSON documents.
- Pretty print with indentation
- Minify
- Copy output
- Clear parse errors
Who OpenAPI Formatter is for
- API authors
- Reviewers cleaning specs
- Students learning OpenAPI
- Engineers preparing gist samples
How to use OpenAPI Formatter
1. Paste OpenAPI JSON.
2. Click Format or Minify.
3. Copy the result.
4. Fix parse errors if shown.
Features
- Local JSON.parse pipeline
- Related JSON and YAML tools
- Honest YAML limits
- Status messages
Examples
- Beautify a compacted swagger.json.
- Minify before embedding in a build note.
- Catch a trailing comma error quickly.
Tips and limits
- Full YAML OpenAPI needs a dedicated YAML parser.
- Does not validate against the OpenAPI schema.
- Large files may be slow in the textarea.
- Keep secrets out of example values.
Related tools
FAQ
Can I paste YAML?
Only if it happens to be valid JSON. True YAML is not parsed here.
Does it validate OpenAPI?
No. It formats JSON only.
Extra notes
OpenAPI Formatter runs entirely in your browser so drafts and secrets never need to leave your device for processing. Keep a backup of long outputs in your own notes if you rely on them for production servers or live events. Accessibility friendly labels come from the module UI strings, and the layout follows the shared BeeForge .bf-tool shell for consistent spacing and buttons.
Support for developers, marketers, and everyday users is the same client-side model: open the page, configure options, copy or download, then paste into your workflow. BeeForge related links on the tool page point to companion utilities so you can move between related generators without hunting the hub.
When you share results with a teammate, paste into a ticket or gist rather than screenshotting alone, so the text remains searchable. If a browser privacy mode blocks clipboard helpers, select the output manually. Local processing also means the tool works offline after the page and scripts have loaded once.
Validate generated configs or hashes in a staging environment before production use. Prefer regenerating secrets after any accidental paste into chat. For teaching sessions, walk through one sample input end to end so students see how live updates and copy buttons behave together.