Frozen copy of the original Encrypt app (July 2026) — kept online unchanged so anything encrypted with it can always be decrypted by the exact same code. Go to the current version
Encrypt / Tools
Encrypt & decrypt
Protect text or a file with a passphrase. It's sealed with AES-256-GCM in your browser — nothing is uploaded, and only the passphrase can open it.
Choose a file or drop it here to encrypt
Files are processed in memory in your browser. Very large files (over ~80 MB) may strain the tab — the passphrase tool is best for documents, keys, and archives, not video.
Curious what's happening under the hood? The How it works page writes out the exact method, and the FAQ covers lost passphrases and what to share where.