Local utility

File Integrity + Encryption

Hash, verify, encrypt, and decrypt files entirely in your browser. Nothing is uploaded. Hashing produces file fingerprints for integrity checks. Encryption protects file contents with a passphrase.

This runs locally and is suitable for practical personal use, but it is not a substitute for professionally audited encryption software or full-disk encryption. Large files may consume substantial memory because browser hashing and encryption operate on in-memory buffers.

1) Integrity / hashing

Drop one or more files to calculate SHA-256, SHA-384, and SHA-512 and export a manifest.

Drop files here or click to choose Files stay local. Hashes are generated in this browser only.

No files selected.

2) Encrypt a file

Create a self-contained encrypted package that stores metadata, salt, IV, and ciphertext together.

Drop one file here or click to choose Output format: .sbxenc.json

Selected file

Passphrase Confirm passphrase

PBKDF2 iterations Package note (optional)

No file selected.

Download encrypted package

3) Decrypt a package

Load an encrypted package file created by this page and recover the original file with the same passphrase.

Drop an encrypted package here or click to choose Expected format: .sbxenc.json

Selected package Passphrase

No package selected.

Download decrypted file