API Tester - REST Client Testing Tool Chrome extension logo

API Tester - REST Client Testing Tool

Free REST API Tool, Use it to develop, test, debug RESTful APIs and HTTP request & REST services in Google Chrome Web Store.

2.79 reviews~10K+ usersBy
Free
Updated 2026-09-02

API Tester - REST Client Testing Tool screenshots

API Tester - REST Client Testing Tool Chrome extension screenshot 1
Screenshots from the Chrome Web Store listing for API Tester - REST Client Testing Tool.

Overview

This is simple REST Client. Use it to develop, test, debug RESTful APIs, HTTP APIs and and easy-to-use UI. This has a number of powerful features than postman... Favorites: - Save favorite requests (including headers, payload etc.) and re-use them with the click of a button. - Import/Export favorites. - Your favorites are automatically synced with your Google account and are not tied to a single machine. History: - View all your previous requests and responses. - Easily run them again. - Easily filter out the requests you're not interested in. Custom Headers: - Choose from a large range of existing request headers. - Create and save your own custom request headers. More... - View the request response in beautiful syntax highlighting (including JSON, XML, HTML and CSS). - See how long each request took to complete. - Supports GET, POST, PUT and DELETE request methods. Custom request methods can also be added by the user. - HTTP Basic Authentication. - Responsive Design. - Dark Mode. - 100% Free. No strings attached. Note on Extension Permissions: The badly named "Read and change all your data" permission is required to send a request to any domain. This does not access or use your data in any way.

Pricing

API Tester - REST Client Testing Tool is free. There is no paid tier to consider.

Similar extensions

Free VPN for Chrome - VPN Proxy VeePN Chrome extension logo

Free VPN for Chrome - VPN Proxy VeePN

Productivity
Free

VeePN is a VPN extension that unblocks websites and secures your connection with encrypted tunneling and unlimited bandwidth.

4.552,000 reviews14M+
View Extension
uBlock Origin Chrome extension logo

uBlock Origin

Privacy & Security
Free

Efficient, open-source content and ad blocker.

4.735,500 reviews11M+
View Extension
Grammarly Chrome extension logo

Grammarly

Writing
Freemium

Grammar, spelling and tone suggestions everywhere you write.

4.543,100 reviews37M+
View Extension
Online Security Chrome extension logo

Online Security

Privacy & Security
Freemium

Powering your web experience with a reliable, endpoint protection layer.

3.6594 reviews11M+
View Extension
Malwarebytes Browser Guard Chrome extension logo

Malwarebytes Browser Guard

Privacy & Security
Free

Block malware, scams, phishing and trackers for safer, cleaner, and ad-free browsing.

3.91,500 reviews11M+
View Extension
AdBlock Chrome extension logo

AdBlock

Privacy & Security
Freemium

One of the most installed ad blockers for Chrome, with simple whitelisting.

4.5290,300 reviews61M+
View Extension

Frequently asked questions

Is API Tester - REST Client Testing Tool free?

Yes, API Tester - REST Client Testing Tool is free to install and use.

What are the best API Tester - REST Client Testing Tool alternatives?

Browse the directory category for comparable options.

Related extensions to API Tester - REST Client Testing Tool

Picked from the same category and the tags api, tester, rest — jump straight to the alternatives and head-to-head pages people open next.

Compare API Tester - REST Client Testing Tool with the obvious rivals

Side-by-side feature tables, pricing and a clear recommendation.