A mini Postman-like API client that runs entirely in your browser.

Overview

API Playground is a lightweight, single-file HTTP client for testing REST APIs. Enter a URL, choose a method, add headers and a body, and send the request — all from your browser. Save frequently used requests as collections in localStorage for quick access.

Built with zero external dependencies — just vanilla HTML, CSS, and JavaScript.

Features

Feature	Description
All HTTP Methods	GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS
Custom Headers	Add, edit, and remove request headers dynamically
Request Body	Full text body support for POST/PUT/PATCH
Response Viewer	Status code with color coding, response headers, formatted body
JSON Pretty-Print	Auto-formats JSON responses for readability
Collections	Save named requests to localStorage, load with one click
Keyboard Shortcut	Ctrl+Enter to send request
Dark Theme	Easy on the eyes with orange accents

Quick Start

Open index.html in any modern browser
Enter an API URL (e.g., https://jsonplaceholder.typicode.com/posts/1)
Choose a method and click Send
Save frequent requests using the Save Current button

No build step, no server, no dependencies.

Project Structure

api-playground/
└── index.html    # The entire application

License

MIT — see LICENSE