OpenAPI / Swagger Viewer - Free Online Tool | PivaBox
Description
How to Use OpenAPI Viewer
- Paste your OpenAPI 3.x JSON or YAML specification into the Input textarea, or click Example Spec to load a sample Petstore API
- Click Parse & View to render the API documentation — title, version, endpoints grouped by tag, with method color badges (GET green, POST blue, PUT orange, DELETE red)
- Click an endpoint to expand details (parameters table, request body schema, responses). Use Copy as cURL to generate curl commands, or Try It to construct request URLs with your own parameter values
Frequently Asked Questions
Is OpenAPI Viewer free?
Yes, PivaBox OpenAPI Viewer is completely free to use. There are no charges, subscriptions, or hidden fees. All processing happens locally in your browser.
Are my API specs uploaded to a server?
No. All parsing and rendering happens entirely in your browser using JavaScript and js-yaml. Your OpenAPI specifications never leave your device, ensuring your API documentation and sensitive endpoints stay private and secure.
Does it support OpenAPI 2.0 (Swagger)?
The viewer currently works with OpenAPI 3.x specifications. OpenAPI 2.0 (Swagger) documents use a different structure (swagger field instead of openapi field). You can use online migration tools to convert Swagger 2.0 specs to OpenAPI 3.x before viewing them here.