Hidden Data Tool – Frequently Asked Questions (FAQ)
The Hidden Data Tool uses LSB steganography to embed a secret message into an image’s pixel data so that the message remains hidden while the image displays normally.
The tool loads the cover image into a canvas, reads its pixel data, and then modifies the least significant bits of the red, green, and blue channels to first store a 32‑bit header (the length of the secret message) and then the secret message itself.
This implementation focuses on hiding text data. With further development, you could extend it to embed other file types.
All operations are done in your browser using a canvas. For additional security, encrypt your secret before embedding.
Yes. The modifications are subtle changes in the least significant bits, so the image appears identical to the original to the human eye.
Use the "Extract Hidden Data" section. The tool reads the image’s pixel data, retrieves the header (which contains the length), and then extracts the secret message.
The tool stores the length of the secret message in the first 32 bits (4 bytes) of pixel data, then encodes the message bits into the following pixels.
Yes. For additional security, encrypt your secret before embedding it.
Extraction works for images processed by this tool. For images without the embedded header, no hidden data will be found.
Yes, the Hidden Data Tool is completely free and web-based.