OhAPI
OpenAPI Specification viewer.
Only for Mac
$4.99
Mac
OhAPI is a native macOS app for developers and API architects who work with OpenAPI specifications. It makes complex definitions easier to understand through an interactive tree visualization, a powerful code viewer, and a dedicated operations browser.
Interactive Tree Visualization
Turn your specification into a clear, structured graph: schemas, properties, parameters, references, and compositions (allOf, anyOf, oneOf) become visual nodes with color cues.
• Expand/collapse sections to stay focused
• Select a node to automatically highlight the corresponding source
• Jump through $ref references instantly
• Smooth animations for easier reading
JSON/YAML Viewer with Syntax Highlighting
Read the raw spec with a view optimized for clarity:
• JSON and YAML syntax highlighting
• Line numbers
• Two-way sync between “tree ↔ source” (auto-scroll to the relevant line)
Operations Browser
Browse your API by endpoints and HTTP methods:
• Operations list (GET, POST, PUT, DELETE, etc.)
• Details (summary, operationId, description)
• Requests and responses grouped by HTTP status (2xx, 4xx/5xx, default)
Reference Resolution with Cycle Detection
OhAPI resolves references across the spec (OpenAPI 3.x and Swagger 2.0) and safely handles circular references to avoid infinite recursion.
Native macOS, Document-Based Workflow
OhAPI behaves like a true macOS app:
• Open via File > Open, drag & drop, or Finder double-click
• Multiple documents in separate windows
• Recent files support
• Built-in examples to get started quickly
Formats & Compatibility
• File formats: .json, .yaml, .yml
• Versions: Swagger 2.0, OpenAPI 3.0.x, OpenAPI 3.1.x
• Light/Dark Mode and customizable node colors
Built with Swift and AppKit, OhAPI is designed to be fast, stable, and deeply integrated into macOS.
- This app hasn’t received enough ratings or reviews to display an overview.
- Fixed a performance issue where syntax highlighting would freeze the app when opening large OpenAPI files. Large documents now load smoothly.
- Fixed syntax highlighting for unquoted values (true, false, null, numbers) not being colored when appearing before closing brackets.
The developer, CoxOne, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- CoxOne SPRL
- Size
- 2.9 MB
- Category
- Developer Tools
- Compatibility
Requires macOS 12.0 or later.
- Mac
Requires macOS 12.0 or later.
- Mac
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 CoxOne SRL
