API Request Builder
Build and send HTTP requests directly from your browser. Configure method, URL, headers, and body, then inspect status, headers, and response content.
Tab 1
Headers
Body & File (for POST, PUT, PATCH)
cURL Import / Export
Export builds a simple cURL command from the current tab. Import supports basic -X, -H, and --data flags.
Note: Some APIs block browser requests with CORS. For those, proxy requests through your own backend server.
Response Headers
No headers yet.
Response Body
Related tools
Regex Tester
Test regular expressions and see all matches highlighted in your text.
Code to UML Diagram
Convert simple class-like code into a Mermaid UML class diagram and preview it instantly.
JSON Formatter & Validator
Pretty-print and validate JSON with error highlighting.
Remove Invisible Characters
Clean hidden characters like zero-width and non-breaking spaces from text.
Case Converter
Convert text to uppercase, lowercase, title case, snake_case, camelCase and more.