Data Pad

Steganography

Hide a text or a file inside a picture, or read one out
Files open only on your computer and are never uploaded.

Open a picture to hide something in

Drop a picture here, or use Open picture above. Any picture your browser can show will do — PNG, JPEG, WebP, AVIF, GIF. You then add a text or a file, and get back a PNG that looks the same and carries it. Nothing at hand? Try the Sample.
Files open only on your computer and are never uploaded.
The picture and what is hidden in it are worked on in this page. Nothing is sent to a server.
  • The data is written into the lowest bits of the picture’s colours: each colour changes by an amount the eye does not see. The result is saved as PNG, the format that keeps every bit.
  • It survives being copied and sent as a file. It does not survive a picture being re-compressed or resized — most chat apps and social networks, a screenshot, saving as JPEG.
  • A password encrypts what is hidden (AES-256). It keeps it unreadable, not unnoticed: this tool can tell that one of its own pictures holds something.