Is my text or key sent to a server?

No. All encryption and decryption run on your device, so nothing is uploaded.

How strong is the encryption?

It uses industry-standard AES and RSA, the same families of algorithms used to secure data across the web.

Can I share encrypted messages with someone else?

Yes. Use RSA: share your public key so others can encrypt to you, and keep your private key to decrypt.

Free AES / RSA Encryption — Encrypt Text Online

Free online AES and RSA encryption. Encrypt and decrypt text, generate keys, sign and verify — all in your browser.

About Free AES / RSA Encryption — Encrypt Text Online

AES / RSA Encryption lets you encrypt and decrypt text using industry-standard AES and RSA. Protect a message with an AES password, exchange RSA public keys, or digitally sign and verify text. Nothing is uploaded — every key and encryption step happens on your device. It is completely free and runs entirely online — just open the page and start using it.

Features

Encrypt and decrypt text with a password using strong AES (128 or 256-bit)
Generate RSA key pairs (2048 or 4096-bit)
Encrypt and decrypt with RSA public and private keys
Digitally sign text and verify signatures
All encryption happens on your device — nothing is uploaded

How to use Free AES / RSA Encryption — Encrypt Text Online

1Choose the AES or RSA tab.
2Enter your text and a password, or generate or paste an RSA key.
3Click Encrypt, Decrypt, Sign, or Verify.
4Copy the result to your clipboard.

Frequently asked questions

Is my text or key sent to a server?: No. All encryption and decryption run on your device, so nothing is uploaded.
How strong is the encryption?: It uses industry-standard AES and RSA, the same families of algorithms used to secure data across the web.
Can I share encrypted messages with someone else?: Yes. Use RSA: share your public key so others can encrypt to you, and keep your private key to decrypt.