Hateblocker

HateBlocker quietly hides toxic comments on YouTube and Facebook before you read them.

It works entirely on your device. Chrome's built-in Gemini Nano language model classifies each comment as toxic or not, and HateBlocker hides the toxic ones with a small "click to reveal" placeholder. No comment text, no browsing data, no analytics are ever sent to a server.

✓ Filter YouTube and Facebook comments
✓ 100% on-device — uses Chrome's built-in AI (Prompt API)
✓ No accounts, no API keys, no subscriptions
✓ Three sensitivity levels: Strict, Balanced, Lenient
✓ Choose which categories to filter: personal attacks, hate speech, threats, sexual harassment, profanity, spam
✓ Three hide styles: a subtle placeholder, a prominent banner, or an outline-only mode that keeps the comment visible with a flag for review
✓ Per-platform toggles
✓ Re-hide a revealed comment with one click
✓ Re-scan the page on demand
✓ Counter of how many comments have been hidden

### Requirements

- Chrome 138 or later
- A device that meets Chrome's requirements for the on-device AI model (the first time you use HateBlocker the model — about 1.5 GB — will download in the background)
- The model status is shown inside the extension popup with a one-click download button when needed

### What HateBlocker is not

- It is not a perfect classifier. Gemini Nano is small and English-first. It catches obvious toxicity reliably but will miss sarcasm and subtler attacks, especially in other languages.
- It fails open. If the model is unsure or the classification fails, comments stay visible.
- It is not a content-moderation tool for platform owners — it just hides comments for you, locally, in your own browser.

### Privacy

HateBlocker does not collect, transmit, store, or share any browsing data. All processing is local. See the privacy policy for details.