Offline

1) Enter data

Large text supported (best effort). Nothing is uploaded.

2) Set passphrase

Recommendation: 12+ characters, unique.
Advanced
Higher is slower but helps resist brute-force attacks.
Both formats remain fully offline. Base64 is the standard portable blob.
Auto-lock / privacy
0 disables. Best effort: clears fields after no interaction.

3) Encrypt

Output is a versioned envelope (SV1) including KDF params, salt, IV, ciphertext, and optional metadata. AES-GCM authentication is built in.

Self-test (encrypt → decrypt roundtrip)


          

            Runs locally in your browser using Web Crypto. No network.