Invisible ink · runs offline · nothing uploaded

Inkwell

Tuck a secret message inside an ordinary picture. The image looks exactly the same — but the words are woven into its pixels, waiting for someone with this tool to read them back.

Choose a picture or drop it here …or paste an image with Ctrl/Cmd+V

Your secret message

Passphrase (optional — encrypts the message)

Hide it & download the picture

Choose the picture with a hidden message …or paste it with Ctrl/Cmd+V

Passphrase (if it was locked)

Reveal the hidden message Peek at the hidden layer

How it works: every pixel's colour is a number. Nudging the very last digit of that number shifts the shade so slightly your eye can't tell — but those tiny nudges spell out your message in binary. With a passphrase, the message is first scrambled with real AES encryption, so even someone who suspects it can't read it. Important: keep and share the result as a .png — saving it as a JPEG would crush the hidden bits and erase the secret.