- Sat 01 November 2025
- misc
- Ben Cottrell
This tool spreads the text bytes across 4 channels, spread across two pixels each. It is not very efficient, but allows the hiding of text in images with very little color change. Nothing is uploaded, everything is done in your browser.
Explanation
The character bytes are packed into the 2 least significant bits of the bytes making up the pixel color channels (red, green and blue). This is useful because the change in two lower bits is not noticable in the image.
The packing structure, for the raw pixel data, would resemble this:
This technique only works with images encoded with a lossless codec, so files are saved in the PNG format.
Conversion Tool
1. Select a Mode:
2. Select an Image