Decrypt a .filex file
Received an encrypted .filex container? Unlock it here. Decryption runs entirely on your device, so the file and its contents never touch a server.
How it works
- Open the Decrypt tool and drop in the
.filexfile. - Enter the password the sender gave you — or, for a file encrypted to your FileX ID, your keystore passphrase (FileX detects which is needed).
- FileX verifies the AES-256-GCM authentication tags; if the password is wrong or the file was altered, it refuses rather than returning corrupt data.
- Download your original file, byte-for-byte identical to the source.
Opens every FileX format
The Decrypt tool reads the current quantum-safe FXQ1 container — password files, multi-file archives, and files encrypted to your FileX ID — and still opens legacy FLX1/FLX2 files made by older versions. You get the same local, zero-upload guarantee either way.
Signed files show who sent them
If the sender signed the file with their FileX ID, decryption verifies the ML-DSA-65 signature and shows the signer's key ID. A file whose signature does not verify fails closed — you never receive tampered contents.
Frequently asked questions
Do I need the same app the sender used?
No — any FileX instance decrypts a .filex file. For a password file you need the file and the password; for a file encrypted to your FileX ID you need that ID unlocked on your device.
Why does it say the password is wrong when I think it is right?
AES-256-GCM authenticates every byte. A single wrong character in the password, or a file corrupted in transit, fails the integrity check. Re-check the password and re-download the file.