Security by Design

PrivateNote.ai is built to keep secrets private—from client-side encryption and burn-after-reading links to privacy-first AI that runs locally whenever possible.

A simple privacy flow you can trust.

Clear steps, no hidden data collection.

Write

Compose your note in the browser — nothing is stored yet.

Infrastructure

Cloudflare Workers deliver the app at the edge. Encrypted notes and operational data are stored in EU-jurisdiction infrastructure.

Notes stored as encrypted ciphertext
Minimized data collection & short retention
EU-jurisdiction storage for encrypted notes and operational data

Manual Reveal

Link preview bots in apps like Slack or iMessage can accidentally “read” a one-time note before your recipient sees it.

“Our manual reveal step forces human interaction, ensuring only the intended recipient consumes the note.”

Write with AI

AI is optional. You can always write a normal encrypted note without it.

First choice

Private AI

Use this when you want AI help without sending draft text away from your browser.

Fully private AI in your browser

Fallback option

Cloud Assist

Use this only when local AI is unavailable or you choose hosted drafting.

Not fully private

Now let’s look at how Private AI works, and how Cloud Assist works when hosted processing is used.

Private AI

Use this when you want AI help without sending draft text away from your browser.

Step by step

  1. Download model

    The model file downloads once to your device.

  2. Load model

    It loads in your browser when you use Private AI.

  3. Local AI request

    Your prompt is processed locally — draft text never leaves the browser.

  4. Accept draft

    You review the suggestion, then accept or modify the wording you want.

  5. Encrypt

    The final note is encrypted on your device.

  6. Share

    Only the encrypted note is sent to PrivateNote.

AI runs locally — your draft stays in your browser. PrivateNote receives only the encrypted note you approve.

If your browser cannot run the local model, or if you explicitly choose hosted drafting, Cloud Assist can help with a different privacy trade-off.

Cloud Assist

Use this only when local AI is unavailable or you choose hosted drafting.

Step by step

  1. Prompt from template

    You pick a starter template and write your prompt in the browser.

  2. Cloud Assist

    Your draft is sent to Cloudflare Workers AI for wording help.

  3. Accept draft

    The response returns to your browser and you accept or modify the draft you want.

  4. Encrypt

    The final note is encrypted on your device.

  5. Share

    Only the encrypted note is sent to PrivateNote.

Your draft is sent to Cloudflare Workers AI for wording help. The finished note is encrypted on your device before anything is shared.

Ready to secure your data?

Fast, ephemeral, and legally compliant.

Start Writing