SealBox
Encrypt files & messages entirely in your browser
Password-protect a file before you email it, encrypt a message to a shareable string, work an explicit AES bench, generate RSA keypairs, and derive PBKDF2 keys — one free, private hub. Runs in your browser — your files and secrets never leave your device.
File Encryption
Password-protect any file with AES-256-GCM before you share it.
File Encryptor
Password-protect any file before you email or share it. AES-256-GCM with a PBKDF2-derived key, performed locally by your browser — no upload, no signup. Free.
Bulk File Encryptor
Batch-encrypt many files with a single password into one downloadable .sealbox archive, and restore them all at once. AES-256-GCM per file, performed locally — no upload. SealBox Pro.
Text Encryption
Encrypt messages into shareable ciphertext strings and back.
Text Encryptor
Turn any message into a shareable encrypted string and back. AES-256-GCM with PBKDF2 key derivation, performed locally by your browser. No upload, free.
Encrypted Notes Vault
Keep private notes encrypted with a master password, stored only on your device. The master password derives an AES-256-GCM key and is never stored. 100% client-side. SealBox Pro.
Keys & Derivation
A raw AES bench, RSA keypair generation with PEM export, and PBKDF2 derivation.
AES Encryption Tool
Encrypt or decrypt with your own AES-128/256 key and IV in GCM or CBC mode. A raw, explicit bench for learning and development — runs entirely in your browser.
RSA Keypair Generator
Generate an RSA-OAEP keypair in your browser and export the public and private keys as PEM files. 2048, 3072, or 4096 bits. No upload, no server, free.
PBKDF2 Key Deriver
Derive a cryptographic key from a password with PBKDF2-HMAC-SHA256. Tunable iterations, random or custom salt, hex or base64 output. Runs in your browser.