Question 1

What is image steganography?

Accepted Answer

Steganography is the practice of hiding a secret message inside an ordinary-looking file. This tool uses LSB (least significant bit) encoding to embed your text into the pixel data of a PNG image without visibly changing it.

Question 2

Will the hidden message change how the image looks?

Accepted Answer

No. Only the least significant bit of each color channel is modified, which is invisible to the human eye. The encoded image looks identical to the original.

Question 3

Is my data uploaded to a server?

Accepted Answer

No. All encoding and decoding happens entirely in your browser using the Canvas API. Your image and message never leave your device.

Question 4

Why must I save the encoded image as PNG?

Accepted Answer

LSB steganography requires lossless storage. JPEG and WebP use lossy compression that destroys the hidden bits. Always download or share the encoded image as PNG.