Ext Ops Panel
Open the app

Cat Highlighter

Chrome extension by Summercat · Productivity · Tools

A Chrome extension in Productivity · Tools with 127 users, barely installed.

Every site you visit. This extension can read and change the content of any page you open.

What the developer says, and 1 screenshot

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
127
Rating
5.0 (14 ratings)
Users, last 17 days
+8
Rating, last 30 days
Not watched long enough to say
Version
v1.7
Updated in the store
2026-09-16
Published
2026-04-29
Manifest
V3
Browser access
5 permissions, 1 site pattern

How it has moved

Users
+8 since 01.09
115-127 · 10 readings
2026-09-15: released v1.62026-09-16: released v1.7
  1. 2026-09-01119
  2. 2026-09-03120
  3. 2026-09-04121
  4. 2026-09-06116
  5. 2026-09-07115
  6. 2026-09-08118
  7. 2026-09-10119
  8. 2026-09-13124
  9. 2026-09-15127released v1.6
  10. 2026-09-17127
Rating
unchanged since 01.09
reviewsrating 5.00 · 10 readings
2026-09-15: released v1.62026-09-16: released v1.7
  1. 2026-09-01reviews13rating5.00
  2. 2026-09-03reviews13rating5.00
  3. 2026-09-04reviews13rating5.00
  4. 2026-09-06reviews13rating5.00
  5. 2026-09-07reviews13rating5.00
  6. 2026-09-08reviews13rating5.00
  7. 2026-09-10reviews13rating5.00
  8. 2026-09-13reviews14rating5.00
  9. 2026-09-15reviews14rating5.00released v1.6
  10. 2026-09-17reviews14rating5.00
Users
+8 since 01.09
115-127 · 10 readings
2026-09-15: released v1.62026-09-16: released v1.7
  1. 2026-09-01119
  2. 2026-09-03120
  3. 2026-09-04121
  4. 2026-09-06116
  5. 2026-09-07115
  6. 2026-09-08118
  7. 2026-09-10119
  8. 2026-09-13124
  9. 2026-09-15127released v1.6
  10. 2026-09-17127
Rating
unchanged since 01.09
reviewsrating 5.00 · 10 readings
2026-09-15: released v1.62026-09-16: released v1.7
  1. 2026-09-01reviews13rating5.00
  2. 2026-09-03reviews13rating5.00
  3. 2026-09-04reviews13rating5.00
  4. 2026-09-06reviews13rating5.00
  5. 2026-09-07reviews13rating5.00
  6. 2026-09-08reviews13rating5.00
  7. 2026-09-10reviews13rating5.00
  8. 2026-09-13reviews14rating5.00
  9. 2026-09-15reviews14rating5.00released v1.6
  10. 2026-09-17reviews14rating5.00

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Every site you visit. This extension can read and change the content of any page you open.

  • Run its own code on the pages it can access scripting
  • Act on the current tab, but only after you click it activeTab
  • Put data on your clipboard clipboardWrite
Show the remaining 2
  • Open a panel beside the page sidePanel
  • Store data in your browser storage

The full permission history for this extension

Version history

  1. Version v1.7
  2. Version v1.6

What changed recently

  1. Package size changed
  2. Released version v1.7 (was v1.6)
  3. Package size changed
Show the remaining 1
  1. Released version v1.6 (was v1.5)

The publisher

Summercat.

Like this one

Listings the catalog judges closest in what they say they do.

  1. ChatGPT Highlighter Describes nearly the same job, smaller audience 369 users ★ 5.0
  2. WebNoteMate: Web Highlighter & AI Prompt Tools Describes nearly the same job, smaller audience 187 users ★ 4.4
  3. WuCai - Highlight and Note Describes nearly the same job, with an established audience 10k users ★ 4.3
  4. NerdFlo Web Highlighter Describes nearly the same job, smaller audience 1 users (last published figure)
  5. highlight2comment Describes nearly the same job, smaller audience 4 users

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Is this your extension?

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

See what the panel does

Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.