Secret Cipher Maker

Transform your messages into emoji ciphers using a secret passphrase. Have fun exchanging secret messages with friends!

✨ Features

  • AES-GCM (256-bit) encryption β€” bank and government level security
  • Encrypted output converted to emoji so it looks like ordinary text
  • Only someone who shares the passphrase can decrypt the message
  • Everything runs in your browser β€” messages and passphrases are never sent anywhere

πŸͺ„ How to Use It

Secret Chats with Friends

Chat in code on messaging apps. Even if someone peeks at your screen, all they'll see is a bunch of emoji!

Secret Love Letters

Send a special message only your crush can read. Only someone who knows the passphrase can decode your feelings.

Stand Out on Social Media

Post emoji ciphers on X or Instagram Stories. Only your friend group knows the passphrase to decode the secret message!

Treasure Hunt Clues

Write encrypted clues on paper and hide them around the house or school. Only those who know the passphrase can read the next hint.

πŸ”’ Privacy

All encryption and decryption happens entirely in your browser. Your messages and passphrases are never sent over the internet. Even the developer of this page cannot see your messages.

❓ FAQ

Is the cipher really secure?

Yes. It uses AES-GCM (256-bit), the same standard used by banks and governments. Without the passphrase, it cannot be decoded.

What if I forget the passphrase?

Without the passphrase, decryption is impossible. Make sure you and your friend share it through a secure channel.

Can I send the emoji cipher in any app?

Yes. Any app that supports text β€” LINE, X, Instagram, email, etc. β€” works fine.

Is any data stored on a server?

No. Everything stays in your browser. Messages and passphrases are never sent to any server.

How to Use It

πŸ’¬

Secret Chats with Friends

Chat in code on messaging apps. Even if someone peeks at your screen, all they'll see is a bunch of emoji!

πŸ’Œ

Secret Love Letters

Send a special message only your crush can read. Only someone who knows the passphrase can decode your feelings.

πŸ“±

Stand Out on Social Media

Post emoji ciphers on X or Instagram Stories. Only your friend group knows the passphrase to decode the secret message!

πŸ—ΊοΈ

Treasure Hunt Clues

Write encrypted clues on paper and hide them around the house or school. Only those who know the passphrase can read the next hint.

πŸ›‘οΈ How Does It Work?

This tool uses AES-GCM, a real encryption standard used by banks and governments. Your passphrase is turned into a super-complex key (via PBKDF2), which scrambles your message completely. Only someone with the same passphrase can unscramble it.

AES-256-GCM PBKDF2 Web Crypto API

πŸ” Privacy

All encryption and decryption happens entirely in your browser. Your messages and passphrases are never sent over the internet. Even the developer of this page cannot see your messages.