AES Text Encryptor

The AES Text Encryptor turns any message into an unreadable Base64 blob that only someone with the right password can turn back into plain text.

It uses AES-256 in GCM mode, an authenticated encryption scheme, so the output is both confidential and tamper-evident: if a single character of the ciphertext is changed, decryption fails cleanly instead of returning garbage.

Your password is never used directly as a key.

Instead it is stretched into a 256-bit key with PBKDF2-SHA256 over many thousands of iterations, which makes brute-force guessing far slower.

A fresh random salt and initialisation vector are generated for every encryption and embedded in the output, so encrypting the same text twice produces two completely different blobs and identical messages never look alike.

All of this metadata travels inside the Base64 string itself, meaning the recipient only needs the blob and the shared password — there is nothing else to copy or configure.

To use it, pick Encrypt, type your text and a strong password, and copy the result; to read a message, switch to Decrypt, paste the blob, enter the same password and the original text appears.

The whole process relies on the browser's built-in Web Crypto API, so it is fast and standards-based.

Everything happens locally — your text, password and keys never leave the page, are never uploaded, logged or stored — and the tool keeps working offline once loaded.

Remember that the password is the only way back: lose it and the text is gone for good.