OpenAPI Swagger Editor

A powerful online editor for OpenAPI/Swagger specifications with real-time validation and interactive documentation preview.

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100%

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4.9 / 5.0

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About This Tool

The OpenAPI Swagger Editor is a comprehensive web-based tool for creating, editing, and validating OpenAPI specifications (formerly Swagger). It features a dual-pane interface with a Monaco-powered code editor on the left for editing YAML/JSON content and a live Swagger UI preview on the right. The tool includes syntax highlighting, real-time validation, error detection, format conversion between YAML and JSON, and the ability to upload existing OpenAPI files. All processing happens securely without requiring external API keys.

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How to Use

Start typing or paste your OpenAPI specification in YAML or JSON format in the left editor pane
Alternatively, click the upload area to select a .yaml, .yml, or .json file from your computer
The editor will automatically validate your specification and show any errors in the validation panel
Use the action buttons to validate, convert between YAML/JSON, or download your specification
View the interactive API documentation preview in the right pane that updates in real-time
Click 'Clear' to reset the editor or 'Download' to save your work

Frequently Asked Questions

Find Quick Answers

What OpenAPI versions does this editor support?

The editor supports OpenAPI Specification versions 2.0 (Swagger 2.0) and 3.x, including OpenAPI 3.0 and 3.1.

Can I upload existing OpenAPI files?

Yes, you can upload .yaml, .yml, or .json files containing OpenAPI specifications. The editor will automatically load and validate them.

Does this tool require an internet connection or API keys?

No, all processing happens client-side in your browser. No external API keys or internet connection is required for core editing and validation features.

Can I convert between YAML and JSON formats?

Yes, the tool includes a conversion feature that can transform your OpenAPI specification between YAML and JSON formats with a single click.

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