Encrypt Text Without Uploading — AES-256 in Browser
Encrypting a message or note before sharing adds a layer of protection if the storage medium is compromised. Sending text to a third-party encryption service to encrypt it is counterproductive, as the server sees the plaintext. This tool uses AES-256-GCM with PBKDF2 key derivation — all implemented using the Web Crypto API running locally in your browser.
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Encryption and decryption use the Web Crypto API in your browser — your text and password never leave your device.
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Text Encryptor →
Free · No upload · No account required
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Frequently Asked Questions
- What encryption algorithm is used?
- AES-256-GCM with PBKDF2 key derivation (100,000 iterations, SHA-256). These are well-established algorithms from the Web Crypto API.
- Is the output portable — can I decrypt it elsewhere?
- The output is a base64-encoded bundle containing the salt, IV, and ciphertext. You can decrypt it in this tool on any device.
- What happens if I forget the password?
- There is no recovery mechanism. AES-256-GCM without the correct password cannot be decrypted.