extension ExtPose

Dup-ID - Scans html for duplicate ID attrs

CRX id


Description from extension meta

Dup-ID - Scans html tags for duplicate ID attributes. Also lists all IDs found on page.

Image from store Dup-ID - Scans html for duplicate ID attrs
Description from store This simple extension will scan the page's html tags and look for duplicate ID attributes. If duplicate IDs are found they are listed along with the number of times they are used. Additionally, all IDs are sorted and displayed for informational purposes.

Latest reviews

  • (2019-07-07) srinivas kadiyala: While learning about HTML Grouping by IDs and Classes, found this chrome extension. Really, I liked the way it displayed the results.
  • (2017-10-18) Igor: It works good and fast. But fails to ignore the content of the <script> tags; their content is supposed to be just text ("text/javascript", "text/template", etc.) and not be parsed as HTML/DOM in any way.
  • (2017-07-26) Antoni: Simple but very effective. Great tool to find duplicate (and not only) ids on a page.
  • (2017-05-10) Leigh Ferguson: Seemed to work great on first use, got all my IDs and found no duplicates.
  • (2016-04-12) James Kieley: Great Tool, Duplicate HTML ids are the devil!
  • (2016-01-20) Yan Ng: When I concentrate on the features of my web-application too much, I tend to forget my HTML syntax. This plugin is really easy to use.


1,000 history
4.8 (8 votes)
Last update / version
2014-09-22 / 1.4
Listing languages