End-to-end encrypted · on-device semantic search

A private memory of every page you keep.

Save pages with one click. Search by meaning, not keywords. The server stores only ciphertext — your URLs, titles, and page content stay readable in your browser only.

Create your vault See how it works

Free tier: 1 GB. Paid: $5/month for 100 GB. No ads. No telemetry.

Opt-in capture

You decide every page.

Nothing is saved automatically. Click the popup button or right-click → Save. The extension uses activeTab permission only — it can't read pages you haven't asked it to.

E2E encrypted

We can't read your captures.

A 24-word recovery passphrase generates a vault key that lives only in your browser. AES-GCM encrypts every record before upload. The server only ever sees ciphertext plus an HMAC of the URL for dedup.

On-device search

Find by meaning.

A 384-dim MiniLM model runs locally. Long pages are chunked with a sliding 256-token window so search returns the relevant passage, not just the page-level average. Queries never leave your machine.

What the server sees — and what it doesn't.

The server stores

· Your email + Argon2id password hash
· A per-device API key hash
· Ciphertext + IV of each captured record
· An HMAC of the canonical URL (blind index for dedup)
· A risk score (0–100) and the reasons array
· Timestamps and size in bytes

The server never sees

· The URL, title, or text of any captured page
· Your passphrase or vault key
· Your search queries
· The contents of any decrypted record
· Which pages you have or haven't captured

Pricing that pays for the storage you can see.

Free

· 1 GB encrypted storage
· All features unlocked
· Unlimited paired browsers

$5 /month

· 100 GB encrypted storage
· Everything in Free
· Priority support

Try it.

The browser extension is on the Chrome Web Store. The dashboard is at app.browserfog.com. The API is open source.

Create your vault