Extension Tracker

YouThumb: YouTube Thumbnail Tester & Generator

139 users Rated 5.00 from 7 ratings Last updated 17 Jun 2026

By None Live in the Chrome Web Store jkeenlkhgffffnmbpeniapfnehkpiphd Last checked 27 Sep 2026, 03:47 UTC

The listing

What the Chrome Web Store shows, as of the last check

Test thumbnails in the real YouTube feed and generate new ones. Preview, score, enhance and improve your CTR before you publish.Summary from the listing
Developer
None
Trader status
Not declared a trader under EU law
Category
Productivity › Tools
First published
9 Jan 2026
Last updated
17 Jun 2026
Version
1.1.0
Size
212 KiB
Minimum Chrome
88
Languages
1 language

English

Website
youthumb.online
Support page
https://youthumb.online/contact
Open in the Chrome Web Store ↗ View the code or download the CRX in CRX Viewer ↗
Users over time As shown on the Chrome Web Store

Tracking began on 27 Sep 2026. The chart appears after the second check.

Show the numbers
CheckedUsersRatingRatings
2026-09-271395.007
Users, 7 days
–
needs a week of history
Users, 30 days
–
needs a month of history
Rank
#57,949
by users, of 264,703 extensions
In its category
#17,611
of 103,498 in Tools

What changed

Every change found on a check, newest first

No changes found since tracking began on 27 Sep 2026.

What it can access

From the extension's manifest, in plain language

Sites
  • https://*.firebaseapp.com/*firebaseapp.com and its subdomains
  • https://*.firebaseio.com/*firebaseio.com and its subdomains
  • https://*.firestore.googleapis.com/*firestore.googleapis.com and its subdomains
  • https://*.googleapis.com/*googleapis.com and its subdomains
  • https://accounts.google.com/*accounts.google.com
  • https://api.youthumb.online/*api.youthumb.online
  • https://asia-east1-aiplatform.googleapis.com/*asia-east1-aiplatform.googleapis.com
  • https://europe-west1-aiplatform.googleapis.com/*europe-west1-aiplatform.googleapis.com
  • https://firestore.googleapis.com/*firestore.googleapis.com
  • https://identitytoolkit.googleapis.com/*identitytoolkit.googleapis.com
  • https://securetoken.googleapis.com/*securetoken.googleapis.com
  • https://us-central1-aiplatform.googleapis.com/*us-central1-aiplatform.googleapis.com
  • https://us-east1-aiplatform.googleapis.com/*us-east1-aiplatform.googleapis.com
  • https://us-west1-aiplatform.googleapis.com/*us-west1-aiplatform.googleapis.com
  • https://www.googleapis.com/*www.googleapis.com
  • https://www.youtube.com/*www.youtube.com
Sites where it runs scripts
  • https://www.youtube.com/*www.youtube.com
Browser features
  • activeTabThe tab you're on, only after you click the extension
  • identitySign you in with your Google account
  • storageSave settings and data in your browser
  • tabsRead the addresses and titles of your tabs

About this data

Collected from the extension's public Chrome Web Store listing. It's checked every month, and again whenever a new version appears. Last checked 27 Sep 2026, 03:47 UTC; next check around 4 Oct 2026.

How we collect the data

Cite this page

Citation
Extension Tracker. “YouThumb: YouTube Thumbnail Tester & Generator” (jkeenlkhgffffnmbpeniapfnehkpiphd). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/jkeenlkhgffffnmbpeniapfnehkpiphd. Accessed 2026-09-28.
BibTeX
@misc{extensiontracker_jkeenlkhgffffnmbpeniapfnehkpiphd,
  title   = {YouThumb: YouTube Thumbnail Tester & Generator (jkeenlkhgffffnmbpeniapfnehkpiphd)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-27},
  url     = {https://extensiontracker.com/extension/jkeenlkhgffffnmbpeniapfnehkpiphd},
  urldate = {2026-09-28}
}

The data is free to reuse under CC BY 4.0.

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