Share a Secret Safely

Encrypt a password or note to send over chat or email.

Nid oes angen mewngofnodi

Text to encrypt

Password

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 — 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.

secrets tips

🔑

Send the encrypted text and the password through different channels (e.g. email the text, text the password).

🔒

AES-256-GCM means even if the message is intercepted, it's unreadable without the password.

⏱️

Agree on the password in advance or via a call — never in the same message as the ciphertext.

💻

Both encryption and decryption run in your browser.

Sut Mae'n Gweithio

Ewch i mewn

Enter your data into the tool above. Everything stays local to your browser.

Proses

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Lawrlwythwch

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

Pam defnyddio ein un ni?

✓Hollol rhad ac am ddim - dim costau cudd, byth

✓Nid oes angen cyfrif, e-bost na mewngofnodi

✓Nid yw ffeiliau byth yn gadael eich dyfais

✓Dim cyfyngiadau maint ffeil o gwbl

✓Dim dyfrnodau ar unrhyw allbwn

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🗒️

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🔑

Send Credentials Securely

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📓

Keep an Encrypted Journal Entry

Encrypt personal writing so only you can read it b

🎓

Learn How Encryption Works

See real AES-256-GCM encryption in action.

Cwestiynau Cyffredin

Back to Text Encryption