# isblocked.fyi

> Check whether uBlock Origin, Brave, AdGuard, AdBlock Plus, Ghostery, Firefox (ETP), Microsoft Edge (TP), DuckDuckGo, or Safari ATFP block a domain. The only blocklist aggregator with built-in search and daily change monitoring. Built for tracking engineers, MarTech teams, and analytics infrastructure owners.

isblocked.fyi is not an adblocker. It indexes what blockers block so you can search a domain and see which lists and products flag it.

- Tracks all major blockers on the market (uBlock Origin, Brave, AdGuard, AdBlock Plus, Ghostery, Firefox ETP, Microsoft Edge TP, DuckDuckGo, Safari ATFP) via their default and optional filter lists across 31 lists
- Ghostery enables 3 engines by default: Ads (EasyList + uBlock filters), Tracking (EasyPrivacy + uBlock Privacy), Annoyances (EasyList Cookie + uBlock Annoyances)
- Firefox ETP Standard mode blocks Advertising, Analytics, and Social tracker categories from Disconnect.me Level-1 list; Content category blocked only in Private Windows by default
- Microsoft Edge TP Balanced mode (default) uses Disconnect.me Tracker Protection lists, same source categories as Firefox ETP
- DuckDuckGo blocks third-party requests via the Tracker Radar compiled blocklist
- Safari ATFP blocks third-party requests to domains on both DDG Tracker Radar and EasyPrivacy; on by default in Private Browsing only (Safari 17+), opt-in for regular tabs via Settings → Advanced → Use advanced tracking and fingerprinting protection → All Browsing
- Shows block type per list: all traffic vs third-party or script-only rules
- Lists are re-fetched and diffed daily; first-seen and removed dates reflect when we detected a change
- Domain monitoring: sign in, add a pattern on the dashboard, get email alerts on add/remove events
- Only product of this kind that combines searchable union index and built-in monitoring in one place

## Search and check

- [Home — domain search](https://isblocked.fyi/): Enter a domain or keyword; see exact, parent, subdomain, and keyword matches with per-list block type and blocker mapping

## Learn more

- [About](https://isblocked.fyi/about): How the index works, why blocklist exposure matters for analytics, FAQ (JSON-LD on page)
- [Stats](https://isblocked.fyi/stats): Live statistics — total domains tracked, most-blocked domains, category breakdown, weekly list activity
- [Block List Digest](https://isblocked.fyi/digest): Data-driven articles about changes in major filter lists, published every three days
- [Contact](https://isblocked.fyi/contact): Feedback, corrections, and general inquiries via contact form

## Monitoring

- [Dashboard](https://isblocked.fyi/dashboard): Add and manage domain monitors (Clerk sign-in required)

## Optional

- [Domain check API](https://isblocked.fyi/api/check/example.com): GET `/api/check/{domain}` — public JSON lookup, rate limited; replace `example.com` with the domain to check