Responsive Tester

Name: Responsive Tester
Rating: 3.11 (94 reviews)
Author: Cool and Fun Software

Test responsive web designs or mobile pages and see if it is mobile friendly

As of May 2026, Responsive Tester has 40,000 users and a 3.11/5 rating from 94 reviews in the Workflow & Planning category.

Cool and Fun Software Workflow & Planning★ Featured

Chrome Web Store ↗.crx

Users+33.3%

40.0K

40,000

Rating−0.6%

3.11

94 reviews

Reviews+3.3%

Version

3.0.0

Manifest V3

90-day change · In the last 90 days this extension gained 10.0K users.

History

1 snapshots

Tracking since Apr 25, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 25, 2026	30.0K	3.13	91	3.0.0
Now	40.0K	3.11	94	3.0.0

Permissions & access

Permissions: activeTab
Host access: None declared

Screenshots

About

Test responsive web designs or mobile pages that detect specific user agents. Test multiple devices at the same time!

The Mobile/Responsive Tester extension allows Developers to test their web pages against common mobile, phablet and tablet devices by emulating the user agent and screen resolution. 

Excellent for testing responsive web designs. Easily switch between portrait and landscape mode and test multiple mobile device's at the same time!

To begin using the software, install our extension.
Navigate to the webpage you wish to test for different resolution sizes.
Click on our software extension icon, and then choose the resolution size.