# SponsorBlock

Skip YouTube video sponsors (browser extension)

Repository: https://github.com/ajayyy/SponsorBlock
Canonical: https://ross.abutalabs.com/products/sponsorblock
Homepage: https://sponsor.ajay.app
Language: TypeScript
License: GPL-3.0
License Family: copyleft
Topics: sponsored-segments, youtube-videos, chrome, firefox, adblock, adblocker, opera, chrome-extension, firefox-extension, youtube, web-extension, sponsorblock, chromium, hacktoberfest
Last push: 2026-08-24T16:29:53+00:00
Link (homepage): https://sponsor.ajay.app

## Health v2 (maintenance only)
Score: 97/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 93, longevity 100
- inputs: {"age_days": 2611, "days_push": 9, "days_rel": 51, "gap_med": 6, "n_releases_24m": 50}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 13702, forks 471 (observed 2026-08-28T04:11:04.624105+00:00)

## What it is
SponsorBlock is an open-source crowdsourced browser extension that automatically skips sponsor segments and other annoying parts (intros, outros, subscribe reminders) in YouTube videos. It pairs with a server and public API where users submit segment timestamps, using a privacy-preserving query system.

## Use cases
- skip sponsor segments in youtube videos
- automatically skip youtube intros and outros
- block subscribe reminders in youtube
- crowdsourced ad skipping for youtube
- self-host a sponsorblock mirror or API
- use sponsorblock with invidious or mpv

## When to choose
- you watch YouTube regularly and want sponsor segments skipped automatically
- you want a privacy-respecting, open-source alternative to ad-style blockers for in-video promotions
- you want to contribute segment data or use the open API in your own tools

## When to avoid
- you need to block YouTube ads themselves - use uBlock Origin instead
- you need offline video processing rather than in-browser playback enhancement
- you watch on platforms without a SponsorBlock port

## Facets
- artifact type: plugin
- maturity: active
- function: browser-extension, web-scraping, analytics
- domain: browser-extensions, media, privacy
- platform: browser, browser-extension
- tags: youtube, sponsor-skipping, adblock, crowdsourced, web-extension, invidious, open-api, crowdsourcing, android, ios

## Member repositories
- ajayyy/SponsorBlock (main) score 97
- ajayyy/SponsorBlockServer (backend) score 68

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:04.624105+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:13:06.284211+00:00, confidence not recorded.
  - readme: https://github.com/ajayyy/SponsorBlock (fetched 2026-08-28T04:11:04.624105+00:00, sha 235db96d5f0b)
  - homepage: https://sponsor.ajay.app (fetched 2026-08-29T08:08:21.436029+00:00, sha 9088c1419ffa)
- Data as of 2026-08-30T08:39:29.467469+00:00.