Sharing a Wi-Fi password
Encrypt it, send the result by email, and tell the passphrase in person or by phone.
Text Encryption (AES)
Encrypt and decrypt text with a passphrase using AES-256-GCM, entirely in your browser.
Result
Enter text and a passphrase, then select Encrypt text.
Result
Paste encrypted text and its passphrase.
Runs in your browser — nothing you enter is sent to a server.
How the Text Encryption (AES) works
Type a message and a passphrase and select Encrypt text. Your browser turns the passphrase into a 256-bit key with PBKDF2 (SHA-256, 600,000 iterations and a random salt) and encrypts the text with AES-256-GCM. The result starts with “ts1:” and can be pasted anywhere; paste it into Decrypt with the same passphrase to read it again.
Nothing is sent to a server. GCM also detects tampering: a wrong passphrase or a changed message fails to decrypt instead of producing garbage.
Formulas
Key
key = PBKDF2-SHA-256(passphrase, 16-byte salt, 600,000 iterations)
Output
ts1: + Base64(salt ‖ 12-byte IV ‖ ciphertext and tag)
Examples
The same text twice
Encrypting the same message again gives a different result, because the salt and IV are random each time.
Frequently asked questions
Can you recover a forgotten passphrase?
No. Without the passphrase the text can't be decrypted — by anyone.
How strong is it?
AES-256-GCM is a current standard; the weak point is the passphrase. Use several random words.
Why 600,000 iterations?
It's OWASP's recommendation for PBKDF2-SHA-256: slow enough to make guessing passphrases expensive.
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