Encrypt files with AES-256-GCM and PBKDF2 key derivation. 100% local — your password never leaves your device.
Free is enough for most one-off jobs. Pro raises the file and batch caps; Pro + Media unlocks GB-scale streaming and unlimited duration.
Larger files supported on Developer (5 GB CSV) and Enterprise (unlimited). All processing happens in your browser — files never reach a server.
Drop a file and enter a strong passphrase.
PBKDF2 (100K iterations, SHA-256) derives a 256-bit AES-GCM key from the passphrase.
Download the encrypted .aes blob (salt + IV + ciphertext + auth tag).
0 bytes uploaded. AES-256 Offline Encryptor runs entirely in your browser. Files, passwords, and PGP private keys never leave your device. No analytics fire during processing — only after you opt-in to dashboard audit logging.
No. The passphrase is derived to a key locally and never transmitted. Lose the password and the file is unrecoverable.
Authenticated encryption that detects tampering — if even one byte is changed, decryption fails with a clear error.