{ } API Toolbox

API utilities for developers and IT professionals

Free Online REST API Tester

Test REST API endpoints online with GET, POST, PUT, PATCH, and DELETE requests, custom headers, request bodies, and formatted responses.

Open toolboxPro — $5/month

Most processing happens locally in your browser.

GET /v1/users/42
{
  "id": 42,
  "name": "Arnaldo",
  "plan": "pro",
  "status": "active"
}

Workspace

Five tools, one interface

REST API Tester

Some APIs block browser requests through CORS. Never paste production secrets into a third-party tool.

Your account

Save workspaces across devices

Simple pricing

Start free. Upgrade when you need more.

Free

$0
  • All five utilities
  • Unlimited basic use
  • Local browser processing
Use free tools
Early access

Pro

$5/month
  • Saved workspaces
  • Request history roadmap
  • Environment variables roadmap
  • Priority feature requests
Upgrade with Stripe

Learn more

How to use Free Online REST API Tester

Choose an HTTP method, enter the endpoint URL, add optional headers and a request body, then send the request. The response status, duration, and body appear in the workspace.

Requests run from your browser. The target API must permit browser requests through CORS, and production secrets should never be entered into a public tool.

Which HTTP methods are supported?

The tester supports GET, POST, PUT, PATCH, and DELETE requests.

Why was my request blocked?

Some APIs block browser-based requests through CORS. The API owner must allow your origin.