New developer utility
OpenAPI Swagger Validator Online
Validate OpenAPI and Swagger documents online. Check required info, version, paths, responses, and common API specification structure issues in your browser.
Use this toolPaste input and run the tool.
How to use OpenAPI Swagger Validator Online
OpenAPI Swagger Validator Online is a focused browser tool for quick technical checks. Paste a safe sample, run the tool, and copy the output into documentation, tickets, QA notes, or development workflows.
Validate OpenAPI and Swagger documents online. Check required info, version, paths, responses, and common API specification structure issues in your browser.
Input example
openapi: 3.0.3
info:
title: Example API
version: 1.0.0
paths:
/users:
get:
responses:
"200":
description: OKOutput example
Version: 3.0.3
Title: Example API
Paths: 1
Status: basic structure looks validPrivacy
This tool is designed for browser-side processing. Avoid pasting passwords, private keys, access tokens, customer records, confidential URLs, regulated data, or unreleased business information.
FAQ
OpenAPI Swagger Validator FAQ
Is this tool free?
Yes. It is free to use online and does not require signup.
Can I upload a file?
Yes. Text-like files can be loaded into the input panel. Review the content before running the tool.
Does this page have hreflang?
Yes. The page links to English and all localized versions for search engines.
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OpenAPI Swagger Validator Online
Validate OpenAPI and Swagger documents online. Check required info, version, paths, responses, and common API specification structure issues in your browser.