Send Secret Messages to Your Bestie

Free coded messages your friends can decode in seconds. Or print them as cards your bestie will keep forever.

Free · No signup · Works on any phone

Bestie the Fox waving with a notebookBrain Sleuth — hero

How It Works

Three steps. Friend solves it. They send one back.

1

Type your message

Up to 100 characters. Make it nice. Or weird. Both work.

2

Pick a cipher

Caesar, Atbash, or Substitution. Bestie hides the words.

3

Copy & send

Click 'Copy Link' when you're done. Paste it in a text, email, or chat to your bestie. They open it, decode it, and can send one back to you.

> Try this one Bestie made:

BESTIE KNOWS -> YVHGRV PMLDH   (cipher: Atbash)
Coded message:   BLF ZIV ZNZARMT
Decoded:         YOU ARE AMAZING

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