Live CSS Tester icon

Live CSS Tester

by Brandon Fowler · Developer Tools
FeaturedManifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

Easily inject CSS into a webpage for testing

Users
2,000
0 in 30 days
Rating
3.9 / 5
unchanged in 30 days
Ratings
7
0 in 30 days
Store rank
#21K
#18K among extensions
Version
2.0.0
updated 3 Jan 2023

Users

monthly, 3 years
2001,1002,000Aug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 2,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years
147Aug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 7 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Live CSS Tester

This plugin allows you to easily add CSS into a webpage for testing. The editor is available through a popup or the devtools. Features: * Enable/Disable CSS * Download CSS * Upload CSS * Dark mode * Word wrap * Autocomplete * Devtools support * Remember last input

Growth

WindowUsersChangeRatingsRating
7 days0+0.0%00.00
30 days0+0.0%00.00
6 months0+0.0%+2−0.34
1 year0+0.0%+2−0.34

Chrome Web Store search rankings

Where Live CSS Tester appears when people search the store, with the 30 day change
Search phrasePosition30 days
css editor#32−8
live#53−15

Version history

2 versions recorded
2.0.03 Jan 2023
1.0.528 Nov 2019

Details

Category
Developer Tools
First seen
28 Nov 2019
Size
147 KB
Languages
en
Pricing
Free
Extension ID
djdnjlkbgeddaglpomonofdcahkpmjaj

Permissions and risk

Minimal riskimpact 2, likelihood 0
Permissions
storagescripting
Site access
<all_urls>
Can read and change data on every website you visit.

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