REST Client
FreeFull-featured REST API client with headers and body
About REST Client
Real API work rarely stops at a bare URL. You're juggling custom headers, auth tokens, content types, and a JSON body all at once, and you need a client that handles every part of the request properly. The REST Client gives you full control over method, headers, and body so you can compose exactly the request your API expects and inspect the complete response that comes back.
Set your headers like Authorization or Content-Type, attach your request body, choose your method, and send. Everything runs in the browser and the full response, including status and returned data, is shown right away. There's no account to create and no watermark on anything you export. It's a privacy-first client for the requests that need more than a single line of input.
Common uses
- Send an authenticated request by adding a Bearer token in the Authorization header to test a protected endpoint.
- Set Content-Type to application/json and post a structured body when building against a JSON API.
- Reproduce a request with the exact headers your mobile app sends to debug a server-side issue.
- Test an API that requires a custom header like X-API-Key without changing your application code.
- Compare responses across environments by swapping the base URL while keeping headers identical.
How to use
- 1
Configure options
Set your preferences using the options panel below.
- 2
Click Generate
Click the process button to generate your result instantly.
- 3
Copy or download
Copy the result to clipboard or download it directly to your device.
Why ToolHub?
- Test APIs instantly
- No Postman needed
- Full header control
FAQ
How is this different from the API Tester?
The REST Client adds full header control and richer body handling, so it suits requests that need auth tokens, custom headers, or specific content types.
Can I add multiple custom headers?
Yes. You can define the headers your endpoint requires, including auth, content type, and any custom keys your API uses.
Does it work with authenticated APIs?
It does. Add your token or key as a header and the request is sent with it, letting you test endpoints behind authentication.
Is any of my data sent to a server?
Requests go directly from your browser to the target API. The tool itself doesn't store your headers, body, or responses.
Can I use REST Client on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.