# ThumbSnap

> Grab any YouTube video thumbnail in max resolution with a single click. Right-click or use the popup — no accounts, no tracking, fully offline.

Source: https://www.extensionshop.store/extension/thumbsnap
Markdown: https://www.extensionshop.store/extension/thumbsnap.md

**Download YouTube thumbnails in one click**

ThumbSnap is the simplest way to download YouTube video thumbnails. Navigate to any YouTube video and click the extension icon to see all available thumbnail resolutions — from default quality up to maxresdefault. Hit Download on the size you want and the image is saved instantly to your device with a clean, descriptive filename based on the video title. You can also right-click any YouTube thumbnail image and select "Download Thumbnail" from the context menu. Everything happens locally: ThumbSnap reads the video ID from the current tab URL, checks which resolutions are available on YouTube's public CDN (i.ytimg.com), and downloads directly. No data is collected, no analytics, no accounts, no servers. On uninstall, an optional feedback survey opens in a new tab (which you can close immediately).

## Key facts

- **Category:** Productivity
- **Price:** Free
- **Rating:** 4.7 from 0 reviews
- **Version:** 1.1.0 (last updated Jun 2026)
- **Size:** 0.2 MB
- **Developer:** ExtensionShop
- **Browsers:** Google Chrome and Chromium-based browsers (Edge, Brave, Arc, Opera)
- **Install:** https://chromewebstore.google.com/detail/thumbsnap/hehakjcffddljhdpjbgaeikibnahfadd
- **Support:** iliasselbarhoumi@gmail.com
- **Privacy policy:** https://www.extensionshop.store/extension/thumbsnap/privacy

## Features

- One-click thumbnail download from any YouTube video
- All available resolutions: default, medium, high, standard, and maxresdefault
- Descriptive filenames generated from the video title
- Right-click context menu on any YouTube thumbnail image
- HEAD requests check which resolutions exist before showing options
- Zero data collection — no analytics, no tracking, no accounts
- Fully offline processing — only connects to YouTube's public CDN
- Manifest V3 compliant

## Permissions and why they are needed

| Permission | Why it is needed |
| --- | --- |
| Active Tab | Reads the current tab's URL to extract the YouTube video ID, and the tab title to generate a descriptive filename for the downloaded thumbnail. |
| Context Menus | Adds a "Download Thumbnail" right-click option when you right-click on YouTube thumbnail images. |
| Downloads | Saves thumbnail images to your device using Chrome's built-in downloads API. |
| Host Access (youtube.com) | Allows the extension to detect YouTube video pages and inject download overlay buttons on the page. |
| Host Access (i.ytimg.com) | Fetches thumbnail images from YouTube's public image CDN. HEAD requests check availability; GET requests download the image. |

## Privacy

**Data collected:**

- **Active tab URL (YouTube only)** — The URL of the currently active YouTube tab is read locally to extract the video ID. It is never stored, transmitted, or logged — used only in-memory to construct the thumbnail download URL.
- **Active tab title (YouTube only)** — The page title of the current YouTube tab is read locally to generate a human-readable filename for the downloaded image. It is never stored or transmitted.

**Never collected:**

- Browsing history or activity outside the active YouTube tab
- Personal information, accounts, emails, or identifiers
- Analytics, telemetry, or usage tracking of any kind
- Cookies, localStorage, or any persistent storage
- Page content, DOM elements, or video data
- Data sent to any first-party or third-party server

**Third-party sharing:** ThumbSnap does not send any data to any server. The only network requests are to YouTube's public thumbnail CDN (i.ytimg.com) to check image availability and download images. No personal data, browsing data, or usage data is ever transmitted anywhere.

**Data retention:** ThumbSnap does not store any data. No cookies, no localStorage, no chrome.storage. The tab URL and title are read into memory, used to download the thumbnail, and immediately discarded. Downloaded images are saved to your device via Chrome's downloads API and managed entirely by your browser.

## Frequently asked questions

### What thumbnail resolutions are available?

ThumbSnap checks for all standard YouTube thumbnail sizes: default (120x90), medium (320x180), high (480x360), standard (640x480), and maxresdefault (1280x720). Not all videos have every resolution — ThumbSnap shows only the ones that exist.

### Does ThumbSnap collect any personal data?

No. ThumbSnap collects zero data. It reads the current tab URL and title in memory to download the thumbnail, then discards them immediately. No cookies, no storage, no analytics, no servers.

### Does it work on YouTube Shorts?

Yes. ThumbSnap works on any YouTube page with a valid video ID, including Shorts, embeds, and standard watch pages.

### Why is maxresdefault not available for some videos?

Not all YouTube videos have a max-resolution thumbnail. This depends on how the video was uploaded and processed by YouTube. ThumbSnap uses HEAD requests to check availability and only shows resolutions that actually exist.

### Where are downloaded thumbnails saved?

Thumbnails are saved to your default Chrome downloads folder using a descriptive filename based on the video title. You can change the download location in Chrome's settings.

## Changelog

- **1.1.0** (Jun 2026) — Added download overlay buttons on YouTube pages, improved filename sanitization, added uninstall feedback survey
- **1.0.0** (May 2026) — Initial release with popup thumbnail picker, context menu download, and multi-resolution support