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.

As of June 2026, API Tester - REST Client Testing Tool has 10,000 users and a 2.67/5 rating from 9 reviews in the Developer Tools category.

Usersno change0%
10.0K
10,000
Ratingno change0%
2.67
9 reviews
Reviewsno change0%
9
Version
1.4.0
Manifest V3

Permissions & access

Permissions
storagealarmsunlimitedStoragedeclarativeNetRequest
Host access
https://*/, http://*/

Screenshots

API Tester - REST Client Testing Tool screenshot 1

About

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.

Technical

Version
1.4.0
Manifest
V3
Size
426KiB
Min Chrome
88
Languages
1
Featured
No

Metadata

ID
gjpgfhjgdajmdhialdclpkjmfkhbdchl
Developer ID
ub0deb3e403c365fe2b2a54d4de6abe10
Developer Email
[email protected]
Created
Oct 27, 2022
Last Updated (Store)
Apr 22, 2023
Last Scraped
Jun 3, 2026
Website
Privacy Policy

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Data sourced from the Chrome Web Store · last verified Jun 3, 2026.