Is YouTube Thumbnail Viewer safe to install?

What data it declares

The developer declares that it does not collect or use your data.

The developer also certifies that your data is not sold to third parties outside approved uses, not used for purposes unrelated to the extension's core function, and not used to decide creditworthiness or lending.

The listing does not link to a privacy policy.

This is the developer's own declaration in the Chrome Web Store. We cannot check it against what the extension does.

What Chrome asks you to allow

When you add it, Chrome asks you to allow it to:

• Read and change your data on www.youtube.com

Derived from the manifest by Chrome's documented rules; the dialog's exact wording depends on your Chrome version and language. Chrome asks again if an update requests more.

What it can reach

Specific sites only: 1 match pattern.

• https://www.youtube.com/* only www.youtube.com

We have not read this listing's manifest since we started keeping permission names. The counts on the card come from the last time we did.

How usual this is for its category

In Make Chrome Yours · Functionality, 12% of extensions ask for access to every site. This one: Access to specific sites only.

The typical extension there declares 1 browser permission; this one declares no browser permissions.

Counted over the live extensions of the same category after our latest full pass of the store. A share is context, not a verdict: what is normal depends on what the extension is for.

Who uses it and how it is kept up

1k users

• Updated in the store today, 2026-10-08.
• No new version in the last 90 days.

What the store shows

• Featured The store's badge for extensions that follow its recommended practices for Chrome extensions.

Has it asked for more over time?

This is the question a permission list on its own cannot answer. An extension that shipped narrow and widened later is a different proposition from one that always asked for the same thing.

The permissions this extension requests have not changed since we started watching it.

Who publishes it

Kazuma Ito, who publishes 3 listings we track. This listing has been in the store since 2023-11-09 and was last updated on 2026-10-08.

Similar extensions that ask for less

Listings close to this one in what they say they do, which declare less reach. Less reach is not a verdict on either: compare what each needs for the job.

1. Youtube Thumbnails No permissions at all · No permissions declared 88 users ★ 5.0
2. YouTube Thumbnail Viewer+ No site access · 1 permission 156 users ★ 4.7
3. Youtube™ Thumbnail Preview No site access · 1 permission 10k users ★ 4.4

How to check or remove it in Chrome

1. Type chrome://extensions in the address bar and find the extension in the list.
2. Open its details. The site access setting shows where it can run; set it to run only on click and it reaches a page only after you press its icon.
3. To uninstall it, choose Remove on the same page.

Questions people ask

What can YouTube Thumbnail Viewer access?

Specific sites only: 1 match pattern. It declares no browser permissions.

What data does YouTube Thumbnail Viewer collect?

The developer declares that it does not collect or use your data. This is the developer's own declaration in the Chrome Web Store. We cannot check it against what the extension does.

Has YouTube Thumbnail Viewer asked for more permissions over time?

The permissions this extension requests have not changed since we started watching it.

Does YouTube Thumbnail Viewer publish a privacy policy?

No, the store listing does not link to a privacy policy.