Adult website blocking
Known pornographic domains and adult platforms are stopped before the page loads, with regularly updated blocklists.
live · free
BlockNSFW
Blocks adult content before it loads.
A lightweight browser extension that keeps your browsing safe, focused and family-friendly. Domain blocklists, multilingual detection, SafeSearch and on-device AI — layered together, running entirely in your browser.
3,000+ users★ 4.3 Firefox★ 5.0 Chrome· 100% on-device
explicit content, blocked 🛡️
see it in action 🎬
Watch it work in 35 seconds.
A quick tour of the six layers, the extras and the privacy-first promise — all in one short clip.
blocknsfw-trailer.mp40:35
defense in depth 🛡️
Not one blocklist. Six layers working together.
Most blockers rely on a single list. BlockNSFW stacks multiple detection methods, so explicit content gets caught even when the web address gives nothing away.
Multilingual hostname filtering
Detects adult hostnames in Chinese, Korean, Russian, Arabic, Thai and transliterated Latin — including internationalized (IDN / punycode) domains.
Beta
AI text protection
A tiny multilingual model reads the page's text on your device to catch adult sites in English and many other languages.
AI image protection
Scans images on your device and blocks explicit ones — even when the web address gives nothing away. Your images are never uploaded.
SafeSearch enforcement
Forces family-safe results on Google, Bing, DuckDuckGo, Yahoo, Brave, Ecosia, Qwant, AOL Search and Presearch.
Optional
DNS protection
An optional network-level layer using Cloudflare for Families stops adult domains before they even resolve.
more than a blocker ✨
Everything you get
Safer social & video
Blocks NSFW Reddit communities, hides Facebook / Instagram Reels and filters age-restricted YouTube content.
Stats & streaks
See exactly what's been blocked and build clean-browsing streaks — all stored locally.
Whitelist & audit
Manage your own allowlist and review a full activity audit whenever you want.
Guided setup
A simple onboarding wizard gets you protected in just a few seconds.
Lightweight & fast
Runs quietly in the background with minimal impact on your browsing speed.
Free & no sign-up
No accounts, no subscriptions, nothing to buy. Install it and you're protected.
who it's for 👥
Built for a calmer web
Parents
who want a safer, calmer browsing environment for their kids.
Students & professionals
who want to stay focused and cut out distractions.
Anyone
who simply prefers a cleaner, family-safe internet.
Ready for a cleaner browser?
Install BlockNSFW and stay in control of what loads — on-device AI, no account, and your browsing is never tracked or sold.
On-device AI · No account · Never tracked or sold