Steganography means hiding a message where nobody thinks to look. Each pixel has three color values, and changing the last bit of each one alters the color by an amount no eye can see. Those bits are enough to store text: a 1000 × 1000 picture holds about 370,000 characters.
Type the message, add a password if you want it encrypted as well (AES-256), and download a PNG that looks identical to the original. The same page reads it back. The catch is that the file must travel untouched: any app that recompresses pictures wipes the message.
How to use the Hide Text in Image tool
- Choose a picture and type the message.
- Add a password if you want one, then download the PNG.
- To read a message, choose the PNG under "Read a hidden message".
Popular uses
- Puzzles, geocaching and escape-room clues
- Invisible ownership notes inside your own artwork
- Teaching how steganography works
Tips for the best result
- Send the PNG as a file or document attachment, never as a chat photo.
- Without a password the message is hidden but not protected. Anyone who knows the method can read it.
Quick facts
| Price | Free |
|---|---|
| Works with | JPG, PNG → PNG |
| Where it runs | In your browser, on your device |
| Account | Not needed |