Notes 
Install the SponsorBlock extension in your Chrome browser to automatically block sponsored segments in YouTube videos.
Reviewed by Marco Wollank
SponsorBlock
sponsor.ajay.app 5.0 (11)
Chrome Extensions Firefox Extensions Browser Extensions Safari Extensions Open Source Android iOS Browser Free
Rate SponsorBlock: No account needed
Threat level
Covered
A covered pick. Anyone can use it as a private drop-in, with no setup or know-how. Enough for most people. Threat levels
Our take
SponsorBlock is more quality-of-life than privacy tool, crowdsourcing the timestamps of sponsor reads and intros so your player skips them automatically, and it is free and open source. The honest note is that it depends on volunteers having already marked a video, so newer or obscure clips may not be covered, and it is a YouTube convenience rather than a tracking defense. Install it because it makes watching better, not because it protects you; for that, pair it with a real blocker.
GitHub at a glance
ajayyy/SponsorBlock GPL-3.0 adblockadblockerchromechrome-extensionchromiumfirefoxfirefox-extensionhacktoberfestoperasponsorblocksponsored-segmentsweb-extensionyoutubeyoutube-videos
Stars
14,018
+30 this week
Forks
484
70 watching
Last commit
3d ago
healthy
Latest release
6.1.7
4mo ago, 100+ total
Star history
Issues
76% closed
414
open
1,296
closed
+6 / -2
opened / closed, last 4 weeks
Opened vs closed, last 12 weeks
Commits, last 26 weeks
17 commits, active 10 of 26 weeks
79 contributors since Jul 2019
Languages
- TypeScript 85.3%
- CSS 8.7%
- HTML 4%
- Other 2%
Updated daily from the GitHub API. Star tracking since Jun 15, 2026.
Website at a glance
sponsor.ajay.app
C score 50
Basic website security headers
Graded by Mozilla HTTP Observatory, tested 13d ago
Inspect this site yourself
Measures the security configuration of the tool's own website, not the privacy of the product itself. A strong tool can still score low here.
SponsorBlock alternatives
uBlock Origin Lite Permission-light Manifest V3 content blocker for Chrome, Edge, and Safari, built by Raymond Hill as the MV3 sibling of uBlock Origin. Blocks ads and trackers declaratively with no persistent background process.
ClearURLs ClearURLs is a privacy extension for the Chrome browser that automatically shortens URLs on webpages you visit. It does this by adding a button to your toolbar and when you…
Decentraleyes Decentraleyes is a browser extension that protects your privacy by ensuring that the data you send and receive from the websites you visit is never sent to or shared with any…
Cookie AutoDelete Cookies are small pieces of data that are stored on your computer and can be used to track your browsing habits. The Cookie AutoDelete extension is a browser extension that…
xBrowserSync xBrowserSync is a Chrome extension that enables you to synchronize your browsing sessions across multiple browsers and computers. This means that you can start browsing on one…
SponsorBlock license, in plain English
GPL-3.0 Strong copyleft
Free to use and modify, but anything you distribute that is built on it must also be open under the same license.
Permits
- Commercial use
- Modification
- Distribution
- Patent use
- Private use
Requires
- Disclose source
- Same license
- State changes
- License and copyright notice
Does not provide
- Liability cover
- Warranty
Why it matters: Strong copyleft keeps every distributed version open. A vendor cannot fold this into a closed product and ship it without releasing their changes.
Plain-language summary of the project's license, not legal advice. Read the full text for the exact terms.