Youtube Watchmarker V3 Remake
Automatically mark YouTube videos you've already watched - now with Manifest V3 support.
As of June 2026, Youtube Watchmarker V3 Remake has 571 users and a 4.79/5 rating from 14 reviews in the Productivity category.
Usersup 15.6 percent+15.6%
571
571
Ratingdown 2.6 percent−2.6%
4.79
14 reviews
Reviewsup 16.7 percent+16.7%
14
Version
1.0.11
Manifest V3
90-day change · In the last 90 days this extension 2 version updates.
History
11 snapshotsTracking since Apr 1, 2026.
View as table
| Date | Users | Rating | Reviews | Version |
|---|---|---|---|---|
| Apr 1, 2026 | 494 | 4.92 | 12 | 1.0.6 |
| Apr 16, 2026 | 501 | 4.92 | 12 | 1.0.6 |
| Apr 22, 2026 | 1.0K | 4.85 | 13 | 1.0.10 |
| Apr 27, 2026 | 507 | 4.85 | 13 | 1.0.10 |
| May 4, 2026 | 520 | 4.85 | 13 | 1.0.10 |
| May 10, 2026 | 527 | 4.79 | 14 | 1.0.10 |
| May 15, 2026 | 552 | 4.79 | 14 | 1.0.10 |
| May 21, 2026 | 579 | 4.79 | 14 | 1.0.11 |
| May 26, 2026 | 2.0K | 4.80 | 15 | 1.0.11 |
| Jun 2, 2026 | 709 | 4.79 | 14 | 1.0.11 |
| Jun 8, 2026 | 584 | 4.79 | 14 | 1.0.11 |
| Now | 571 | 4.79 | 14 | 1.0.11 |
Changelog
- May 15, 2026description
Many users encounter the inconvenience of beginning a YouTube video, only to realize partway through that they have already viewed it. YouTube Watchmarker addresses this issue by automatically tracking and marking previously watched videos. KEY FEATURES: 🎯 Smart Detection • Browser navigation tracking • Browser history synchronization • YouTube watch history synchronization 👁️ Visual Indicators + Options • Fade out thumbnails of watched videos • Convert thumbnails to grayscale • Display "watched" badges with dates • Hide progress bars on completed videos • Ability to remove videos from watched history 💾 Reliable Data Management: • Local database storage for privacy • Export/import functionality for backups • Hourly browser and youtube history synchronization 🔍 Powerful Search - Quickly find videos in your watch history with the built-in search tool The extension runs quietly in the background, automatically updating your watch status as you browse YouTube. All data is stored locally on your device. Changelog: v1.0.6: • improved youtube synchronization • fixed video deletion from youtube history v1.0.7: • fixed some issues with video marks v1.0.8: • added a "Quick Sync" option that will only sync the last 1000 videos watched v1.0.9: • added support for youtube's latest update (main page and recommendations) v1.0.10: • improved support for the latest youtube layout A refreshed version of the original Watchmarker for YouTube extension, now working with Manifest V3. Credit goes to the original author.
Starting a video only to realize you’ve already seen it is annoying. YouTube Watchmarker runs in the background to prevent this by tracking what you've seen and visibly marking those videos on the site. Features: 🎯 Tracking • Track browser navigation in real-time • Sync your browser history • Sync your YouTube watch history ⚙️ Configurable Visual Settings • Fade out thumbnails for videos you have already watched • Convert watched thumbnails to grayscale • Add a badge to the thumbnail showing the exact date you viewed it • Hide the built-in red progress bar on videos you have completed • Display full progress bars on videos you have completed 💾 Data & Privacy: • All data is stored locally on the device so your history remains private • Synchronize your history automatically every hour • Support for exporting/importing your watched videos database • Includes a built-in search tool to quickly find previously watched videos • Manually remove specific videos from your YouTube/Browser history Changelog: v1.0.6: • improved youtube synchronization • fixed video deletion from youtube history v1.0.7: • fixed some issues with video marks v1.0.8: • added a "Quick Sync" option that will only sync the last 1000 videos watched v1.0.9: • added support for youtube's latest update (main page and recommendations) v1.0.10: • improved support for the latest youtube layout v1.0.11: • added a popup to make it easier and faster to sync your watched history (just click the extension icon) • added a new visual option to mark watched videos (red progress bar) A refreshed version of the original Watchmarker for YouTube extension, now working with Manifest V3. Credit goes to the original author.
- Apr 16, 2026description
Many users encounter the inconvenience of beginning a YouTube video, only to realize partway through that they have already viewed it. YouTube Watchmarker addresses this issue by automatically tracking and marking previously watched videos. KEY FEATURES: 🎯 Smart Detection • Browser navigation tracking • Browser history synchronization • YouTube watch history synchronization 👁️ Visual Indicators + Options • Fade out thumbnails of watched videos • Convert thumbnails to grayscale • Display "watched" badges with dates • Hide progress bars on completed videos • Ability to remove videos from watched history 💾 Reliable Data Management: • Local database storage for privacy • Export/import functionality for backups • Hourly browser and youtube history synchronization 🔍 Powerful Search - Quickly find videos in your watch history with the built-in search tool The extension runs quietly in the background, automatically updating your watch status as you browse YouTube. All data is stored locally on your device. v1.0.6 update: • improved youtube synchronization • fixed video deletion from youtube history A refreshed version of the original Watchmarker for YouTube extension, now working with Manifest V3. Credit goes to the original author.
Many users encounter the inconvenience of beginning a YouTube video, only to realize partway through that they have already viewed it. YouTube Watchmarker addresses this issue by automatically tracking and marking previously watched videos. KEY FEATURES: 🎯 Smart Detection • Browser navigation tracking • Browser history synchronization • YouTube watch history synchronization 👁️ Visual Indicators + Options • Fade out thumbnails of watched videos • Convert thumbnails to grayscale • Display "watched" badges with dates • Hide progress bars on completed videos • Ability to remove videos from watched history 💾 Reliable Data Management: • Local database storage for privacy • Export/import functionality for backups • Hourly browser and youtube history synchronization 🔍 Powerful Search - Quickly find videos in your watch history with the built-in search tool The extension runs quietly in the background, automatically updating your watch status as you browse YouTube. All data is stored locally on your device. Changelog: v1.0.6: • improved youtube synchronization • fixed video deletion from youtube history v1.0.7: • fixed some issues with video marks v1.0.8: • added a "Quick Sync" option that will only sync the last 1000 videos watched v1.0.9: • added support for youtube's latest update (main page and recommendations) v1.0.10: • improved support for the latest youtube layout A refreshed version of the original Watchmarker for YouTube extension, now working with Manifest V3. Credit goes to the original author.
Permissions & access
- Permissions
- storagetabshistorycookiesalarmsscriptingdownloadsdeclarativeNetRequestWithHostAccess
- Host access
- https://www.youtube.com/*, https://m.youtube.com/*
Screenshots
About
Starting a video only to realize you’ve already seen it is annoying. YouTube Watchmarker runs in the background to prevent this by tracking what you've seen and visibly marking those videos on the site. Features: 🎯 Tracking • Track browser navigation in real-time • Sync your browser history • Sync your YouTube watch history ⚙️ Configurable Visual Settings • Fade out thumbnails for videos you have already watched • Convert watched thumbnails to grayscale • Add a badge to the thumbnail showing the exact date you viewed it • Hide the built-in red progress bar on videos you have completed • Display full progress bars on videos you have completed 💾 Data & Privacy: • All data is stored locally on the device so your history remains private • Synchronize your history automatically every hour • Support for exporting/importing your watched videos database • Includes a built-in search tool to quickly find previously watched videos • Manually remove specific videos from your YouTube/Browser history Changelog: v1.0.6: • improved youtube synchronization • fixed video deletion from youtube history v1.0.7: • fixed some issues with video marks v1.0.8: • added a "Quick Sync" option that will only sync the last 1000 videos watched v1.0.9: • added support for youtube's latest update (main page and recommendations) v1.0.10: • improved support for the latest youtube layout v1.0.11: • added a popup to make it easier and faster to sync your watched history (just click the extension icon) • added a new visual option to mark watched videos (red progress bar) A refreshed version of the original Watchmarker for YouTube extension, now working with Manifest V3. Credit goes to the original author.
Technical
- Version
- 1.0.11
- Manifest
- V3
- Size
- 519KiB
- Min Chrome
- 88
- Languages
- 1
- Featured
- No
Metadata
- ID
- phoakahhndaanafnmallehjodhldlkgp
- Developer ID
- u41bba8d257e1cf895c972f8f0d158261
- Developer Email
- [email protected]
- Created
- Aug 19, 2025
- Last Updated (Store)
- May 14, 2026
- Last Scraped
- Jun 8, 2026
- Website
- hanzistack.com
- Support URL
- —
- Privacy Policy
- —
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Data sourced from the Chrome Web Store · last verified Jun 8, 2026.