Markup Validator icon

Markup Validator

by Roman Grinyov · grinvik.com · Workflow & Planning
Established publisherManifest V3 Free
View in Chrome Web Store Data as of 18 Oct 2026

Check the markup of the current page using various markup validators

Users
85
+9 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#90K
#75K among extensions
Version
1.0.7
updated 4 Aug 2026

Users

monthly, 3 years
104887Aug 2023Apr 2025Oct 2026
Latest, 18 Oct 2026: 85 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years
001Aug 2023Apr 2025Oct 2026
Latest, 18 Oct 2026: 0 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 Markup Validator

This extension is designed to check the markup of the current page or any HTML code If you have any questions, please contact me by email Source code: https://github.com/w3roman/crx-markup-validator

Growth

WindowUsersChangeRatingsRating
7 days+5+6.2%00.00
30 days+9+11.8%00.00
6 months−4−4.5%00.00
1 year+6+7.6%00.00

Version history

5 versions recorded
1.0.74 Sep 2024
1.0.63 Sep 2024
1.0.52 Aug 2024
1.0.419 Nov 2021
1.0.314 Nov 2021

Details

Category
Workflow & Planning
First seen
14 Nov 2021
Size
54 KB
Languages
en
Pricing
Free
Extension ID
fkkaidikdiekajbmmpiggofmjcgajegl

Permissions and risk

Moderate riskimpact 2, likelihood 2
Permissions
storagetabs

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