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Encrypt a Private Note

Protect sensitive notes you store or paste somewhere.

Nid oes angen mewngofnodi

Strong, standard encryption: AES-256-GCM with a key derived from your password via PBKDF2 (250,000 iterations, SHA-256). Each message uses a fresh random salt and IV.

The password is never stored or sent anywhere β€” everything runs in your browser. If you lose the password, the message cannot be recovered. Share the encrypted text and the password through separate channels.

notes tips

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Encrypt a note before pasting it into a doc, ticket, or notes app you don't fully trust.

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Only someone with the password can read it β€” keep the password somewhere safe.

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There's no recovery if you forget the password, so store it carefully.

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Nothing is uploaded.

Sut Mae'n Gweithio

1
Ewch i mewn
Enter your data into the tool above. Everything stays local to your browser.
2
Proses
The tool processes your data instantly in your browser using JavaScript. No server, no waiting.
3
Lawrlwythwch
Get your result instantly. Nothing is stored after you leave the page β€” complete privacy.

Pam defnyddio ein un ni?

βœ“Hollol rhad ac am ddim - dim costau cudd, byth
βœ“Nid oes angen cyfrif, e-bost na mewngofnodi
βœ“Nid yw ffeiliau byth yn gadael eich dyfais
βœ“Dim cyfyngiadau maint ffeil o gwbl
βœ“Dim dyfrnodau ar unrhyw allbwn

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