Choose a file, type a password, and click Encrypt to download a protected copy with a .enc extension; click Decrypt on a .enc file with the same password to get the original file back under its original name.
File Encryption Tool
Encrypt or decrypt a file with a password, right in this browser - no upload, no app to install.
The file is scrambled with AES-256 using a key derived from your password (PBKDF2, 250,000 rounds) plus a fresh random salt and IV every time, so encrypting the same file twice with the same password produces two different .enc files - that is expected, not a bug.
A wrong password, or a .enc file that was edited or corrupted, is refused with a plain error message instead of producing a broken or garbage file.
The .enc file carries a small 32-byte header (a tag plus a fresh salt and IV) in front of the scrambled data, and your original filename is encrypted inside that data too, so Decrypt can restore the exact filename without it ever being stored outside the encrypted file.
Frequently Asked Questions
What does File Encryption Tool do?
Encrypt or decrypt a file with a password, right in this browser - no upload, no app to install.
When should I reach for file encryption tool?
The file is scrambled with AES-256 using a key derived from your password (PBKDF2, 250,000 rounds) plus a fresh random salt and IV every time, so encrypting the same file twice with the same password produces two different .enc files - that is expected, not a bug.
What complementary tools work well alongside file encryption tool?
There is no password recovery: this tool does not store your password anywhere, so a lost password makes the encrypted file permanently unrecoverable - write it down somewhere safe before you close this tab.