Security & cryptography

Encrypt / decrypt text

Use PBKDF2 + AES-256-GCM by default, with explicitly labeled legacy compatibility modes.

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Input

Result

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Using this tool

Test a text encryption/decryption round trip using a demo passphrase.

Actions: Encrypt · Decrypt

Example

This is a format preview, not decryptable ciphertext. Decrypt the actual complete result with the same algorithm and demo passphrase to recover the input.

Example action and settings

Action: Encrypt
Passphrase: public-demo-only
Algorithm / format: AES-256-GCM (recommended, BW1 format)

Input / action

Hello, 世界!

Result / expected behavior

BW1.310000.<salt>.<iv>.<ciphertext-and-tag> (randomized envelope).

Available options: Passphrase · Algorithm / format

Scope and limitations

Plaintext is limited to 700,000 UTF-8 bytes; 310,000 PBKDF2 iterations can take time.
AES-GCM decryption accepts only this tool’s BW1 format and requires Web Crypto.

Common mistakes

Do not demonstrate with real passphrases. Legacy AES/TripleDES/Rabbit/RC4 formats lack integrity checks and are not the default GCM format.

Related tools

Hash text Bcrypt hash and verify

Privacy and browser support

Input is processed in this browser. Do not use real keys or active sensitive credentials as demonstration data. Device features require browser support and your permission.