Free Online HTTP Request Client and API Tester (Postman Alternative)

The HTTP Request Client is a free online API testing tool that lets you send HTTP requests to any REST endpoint and inspect the full response right in your browser. It works as a lightweight Postman alternative and ReqBin-style client, supporting every common HTTP method, custom headers, query parameters, multiple request body formats, and several authentication modes. You can import cURL commands, view formatted responses, search the body, inspect timing and redirect chains, and generate ready-to-run code snippets in 21 programming languages.

What Is an HTTP Request Client?

An HTTP request client is a tool that builds and sends HTTP requests to a server and shows the response. Developers use it to test APIs, debug webhooks, validate authentication, and check response shapes without writing code. This online client runs entirely through a secure backend proxy, so you can reach public endpoints even from a restricted network.

Why Use an Online API Tester?

• Test REST and GraphQL endpoints during development and debugging.
• Validate headers, cookies, status codes, and response bodies.
• Generate client code in many languages to paste into your project.
• Share a saved request with teammates through a single link.
• No installation required; works on any device with a browser.

How To Send an HTTP Request

1. Enter the target URL in the address field.
2. Select the HTTP method (GET, POST, PUT, PATCH, DELETE, HEAD, or OPTIONS).
3. Add query parameters and request headers as key-value pairs.
4. Choose a request body type and enter the payload if needed.
5. Set authentication (none, Basic, Bearer, or API key).
6. Click Send and review the response in the tabs below.

Supported HTTP Methods

The tool supports GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS, covering standard CRUD operations and health or metadata checks.

Request Builder Features

Headers

Add custom request headers with autocomplete for common names such as Content-Type, Accept, Authorization, and User-Agent. A header presets menu lets you apply standard values in one click.

Query Parameters

Manage query string parameters in a table; the URL updates live as you type, and editing the URL syncs the parameter rows back.

Request Body Types

• None - send no body.
• form-data - multipart form data with optional file upload.
• x-www-form-urlencoded - URL-encoded key-value pairs.
• raw - plain text in JSON, XML, HTML, text, or JavaScript.
• binary - upload a single file as the raw body.

Authentication

• None - send the request without credentials.
• Basic - HTTP Basic auth from a username and password.
• Bearer - Bearer token sent in the Authorization header.
• API key - key-value pair sent in a header or as a query parameter.

Understanding the Response

Pretty, Raw, and Preview Tabs

The Pretty tab auto-detects JSON, XML, HTML, or JavaScript and shows syntax-highlighted, formatted output. The Raw tab shows the unmodified body, and the Preview tab renders HTML or shows an image, PDF, audio, or video preview for binary responses.

Response Body Formats

A format selector lets you force or auto-detect the view: Auto, JSON, XML, HTML, JavaScript, Text, Raw, Hex, or Base64. Hex and Base64 views help inspect binary payloads, and invalid JSON still displays as plain text.

Binary and Media Preview

Images, PDFs, audio, and video are detected by content type and rendered as playable or viewable previews. Large or non-media binaries can be inspected as Hex or Base64 and downloaded with the correct file extension.

Cookies and Headers

The Headers tab lists every response header, and the Cookies view parses Set-Cookie headers into name, value, and attribute rows for quick review.

Response Search

A search box highlights every match inside the Pretty body, making it easy to locate a field in a long JSON response.

Timing Breakdown and Redirect Chain

The timing bar visualizes DNS lookup, connection, wait, and download phases with a total time. When a request follows redirects, the redirect chain lists each visited URL so you can trace the flow.

Generate Code Snippets in 21 Languages

After building a request, the tool generates runnable code in cURL, PHP (cURL and Guzzle), JavaScript (Fetch, jQuery, Axios, Node.js), Python (requests and http.client), Java (OkHttp and Unirest), Ruby, Go, C#, Swift, Kotlin, Rust, Dart, PowerShell, R, and Perl. Copy or download any snippet.

Import cURL Commands

Paste a cURL command into the import modal to auto-fill the method, URL, headers, body, and authentication. This is the fastest way to turn a terminal command into an editable request.

Request History and Shareable Links

Recent requests are saved in your browser local storage for one-click restore. The Share button encodes the full request configuration into a URL hash; opening that link rebuilds the request in the builder.

Safety, Limits, and Privacy

Requests are proxied through the server. Response bodies larger than 1MB are truncated for display, the default timeout is 30 seconds and is adjustable, redirects are followed automatically, and SSL certificate verification can be toggled for testing self-signed endpoints. Request history stays in your browser and is never stored on the server.

Frequently Asked Questions