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DemoMarker

Chrome extension by Demo Tools · Productivity · Tools

  • Featured
  • Established publisher

A Chrome extension in Productivity · Tools with 80 users, barely installed. Audience over the last 30 days: +16.

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

What the developer says, and 2 screenshots

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

Users
80
Rating
5.0 (2 ratings)
Users, last 30 days
+16
Rating, last 30 days
Steady over 30 days
Version
1.1.2
Updated in the store
2026-10-15
Published
2025-12-21
Manifest
V3
Browser access
3 permissions, 2 site patterns

How it has moved

Users
+16 since 01.10
64-84 · 15 readings
2026-10-15: released 1.1.2
  1. 2026-10-0471
  2. 2026-10-0876
  3. 2026-10-1077
  4. 2026-10-1378
  5. 2026-10-1675
  6. 2026-10-1872
  7. 2026-10-1971
  8. 2026-10-2177
  9. 2026-10-2278
  10. 2026-10-2379
  11. 2026-10-2480
  12. 2026-10-2579
  13. 2026-10-2784
  14. 2026-10-2980
  15. 2026-10-3180
Rating
unchanged since 01.10
reviewsrating 5.00 · 15 readings
2026-10-15: released 1.1.2
  1. 2026-10-04reviews2rating5.00
  2. 2026-10-08reviews2rating5.00
  3. 2026-10-10reviews2rating5.00
  4. 2026-10-13reviews2rating5.00
  5. 2026-10-16reviews2rating5.00
  6. 2026-10-18reviews2rating5.00
  7. 2026-10-19reviews2rating5.00
  8. 2026-10-21reviews2rating5.00
  9. 2026-10-22reviews2rating5.00
  10. 2026-10-23reviews2rating5.00
  11. 2026-10-24reviews2rating5.00
  12. 2026-10-25reviews2rating5.00
  13. 2026-10-27reviews2rating5.00
  14. 2026-10-29reviews2rating5.00
  15. 2026-10-31reviews2rating5.00
Users
+38 since 01.09
42-84 · 29 readings
2026-10-15: released 1.1.2
  1. 2026-09-0142
  2. 2026-09-0243
  3. 2026-09-0346
  4. 2026-09-0549
  5. 2026-09-0652
  6. 2026-09-0751
  7. 2026-09-0853
  8. 2026-09-0952
  9. 2026-09-1350
  10. 2026-09-1551
  11. 2026-09-1754
  12. 2026-09-2050
  13. 2026-09-2557
  14. 2026-09-2764
  15. 2026-10-0471
  16. 2026-10-0876
  17. 2026-10-1077
  18. 2026-10-1378
  19. 2026-10-1675
  20. 2026-10-1872
  21. 2026-10-1971
  22. 2026-10-2177
  23. 2026-10-2278
  24. 2026-10-2379
  25. 2026-10-2480
  26. 2026-10-2579
  27. 2026-10-2784
  28. 2026-10-2980
  29. 2026-10-3180
Rating
unchanged since 01.09
reviewsrating 5.00 · 29 readings
2026-10-15: released 1.1.2
  1. 2026-09-01reviews2rating5.00
  2. 2026-09-02reviews2rating5.00
  3. 2026-09-03reviews2rating5.00
  4. 2026-09-05reviews2rating5.00
  5. 2026-09-06reviews2rating5.00
  6. 2026-09-07reviews2rating5.00
  7. 2026-09-08reviews2rating5.00
  8. 2026-09-09reviews2rating5.00
  9. 2026-09-13reviews2rating5.00
  10. 2026-09-15reviews2rating5.00
  11. 2026-09-17reviews2rating5.00
  12. 2026-09-20reviews2rating5.00
  13. 2026-09-25reviews2rating5.00
  14. 2026-09-27reviews2rating5.00
  15. 2026-10-04reviews2rating5.00
  16. 2026-10-08reviews2rating5.00
  17. 2026-10-10reviews2rating5.00
  18. 2026-10-13reviews2rating5.00
  19. 2026-10-16reviews2rating5.00
  20. 2026-10-18reviews2rating5.00
  21. 2026-10-19reviews2rating5.00
  22. 2026-10-21reviews2rating5.00
  23. 2026-10-22reviews2rating5.00
  24. 2026-10-23reviews2rating5.00
  25. 2026-10-24reviews2rating5.00
  26. 2026-10-25reviews2rating5.00
  27. 2026-10-27reviews2rating5.00
  28. 2026-10-29reviews2rating5.00
  29. 2026-10-31reviews2rating5.00

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times 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
  • Store data in your browser storage

The full permission history for this extension

Version history

  1. Version 1.1.2

What changed recently

  1. Store description rewritten
  2. Released version 1.1.2 (was 1.1.1)

The publisher

Demo Tools publishes 2 listings we track, 85 users between them. Listed website: demosecret.com.

  1. Launchpad Demo Tools · Productivity · Tools · published 2026-06-09 5 users

Like this one

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

  1. Demolens - Annotate, Zoom & Record on Screen Describes nearly the same job, smaller audience 82 users
  2. Showmark: Modern Draw & Annotate on Any Web Page Describes nearly the same job, smaller audience 12 users ★ 5.0
  3. Easy Demo Describes nearly the same job, smaller audience 10 users ★ 5.0
  4. Page Marker - Draw on Any Tab Describes nearly the same job, smaller audience 72 users ★ 5.0
  5. Screen Marker Describes nearly the same job, smaller audience 67 users ★ 5.0

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.

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The badge shows the audience and rating from our last pass over the store and links back to this page.

Users and rating on Ext Ops Panel

Markdown

[![Users and rating on Ext Ops Panel](https://extops.dev/extensions/oflenmchbmnnbipgkgeelagbpbeodhij/badge.svg)](https://extops.dev/extensions/oflenmchbmnnbipgkgeelagbpbeodhij)

HTML

<a href="https://extops.dev/extensions/oflenmchbmnnbipgkgeelagbpbeodhij"><img src="https://extops.dev/extensions/oflenmchbmnnbipgkgeelagbpbeodhij/badge.svg" alt="Users and rating on Ext Ops Panel" height="20"></a>

Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-10-29. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built