HTML Tag Checker by ACHN icon

HTML Tag Checker by ACHN

by ACHN · achn.jp · Developer Tools
Established publisherManifest V3 Free
View in Chrome Web Store Data as of 16 Oct 2026

It checks HTML start and end tag pairs, etc. It also works with split HTML and forms sent via POST. (No external communication.)

Users
56
+5 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
1
0 in 30 days
Store rank
#104K
#87K among extensions
Version
0.1.6.8
updated 27 Feb 2026

Users

monthly, 17 months
02856May 2025Feb 2026Oct 2026
Latest, 16 Oct 2026: 56 usersMove the mouse over the chart for any month

Ratings count

monthly, 17 months
001May 2025Feb 2026Oct 2026
Latest, 16 Oct 2026: 1 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 HTML Tag Checker by ACHN

If the HTML tag pair is incorrect, you can jump to the start and end tag positions to check. [MAIN FUNCTIONS] ● You can view the browser's communication log in a list and check the details of each content. ● If the content is HTML, an HTML tag check is performed automatically. ● If there is an error in the HTML tag, the following colors will be displayed. ・ Yellow "Warning": A part that should be corrected if possible, such as when a tag is not closed. ・ Red "Error": A part that should definitely be corrected, such as when a start tag is missing. → You can jump to each source position and check. ● Click on the correct pair of HTML tags to jump to the paired tag. ● If an HTML tag is misidentified, you can add, change, or delete the HTML tag detection in the settings. ● If the content is a font, you can perform a detailed font check. (You can also enter text freely) ● In the communication log list, you can narrow down the logs to be displayed by URL or content. [e.g.] html: Display only html. error: Display only content with link errors, etc. redirect: Display only redirected content. ● You can also set URLs that you do not want to record in the communication log. ● You can also set line wrapping and indentation when displaying source code. [SUPPORT] If you have any comments, requests, or bugs, please contact us via the "Website" or "Email" links at the bottom of this page. (There is also a link in the extension's "How to Use" section.) [REVIEWS] If you like this extension, please leave a review. Your review will encourage future extension development. [UPDATE HISTORY] ・ v0.1.6.8 (2026/02/27) - Add: The HTML check results list is now resizable. - Add: "Developer Debug Flag" to settings. - Fix: Review URL. - Change: Improve Form processing. ・ v0.1.6.7 (2026/02/23) - Change: Default language to English. - Add: Display HTML check results in HTTP list. - Change: Backported debug functions. ・ v0.1.6.4 (2025/07/18) - Change: Description. ・ v0.1.6.3 (2025/06/12) - Change: Extension name. ・ v0.1.6.2 (2025/06/01) - Add: The setting "Filter Initial Value". ・ v0.1.6.1 (2025/05/31) - First release

Growth

WindowUsersChangeRatingsRating
7 days+5+9.8%00.00
30 days+5+9.8%00.00
6 months+18+47.4%00.00
1 year+41+273.3%00.00

Version history

6 versions recorded
0.1.6.827 Feb 2026
0.1.6.723 Feb 2026
0.1.6.418 Jul 2025
0.1.6.312 Jun 2025
0.1.6.21 Jun 2025
0.1.6.131 May 2025

Details

Category
Developer Tools
First seen
31 May 2025
Size
75 KB
Languages
en, ja
Pricing
Free
Support
achn.jp
Extension ID
cfgmfkenlkplnnnjijonnepdabdbfidk

Permissions and risk

Low riskimpact 1, likelihood 1
Permissions
storage

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