Image steganography

About Image steganography

Hide or reveal a text message in an image's RGB least-significant bits. Always exports PNG so the payload is not destroyed by JPEG compression.

LSB steganography tweaks the lowest bit of each red, green, and blue channel. Changes are tiny and usually invisible. A 32-bit length header tells the decoder how many payload bytes to read.

Output is forced to PNG. JPEG (and most social recompression) will scramble those bits and destroy the message — the UI says so up front. Capacity is roughly width × height × 3 bits before the header.

Optional passphrase XOR is obfuscation, not encryption. Frame the tool for puzzles, authorship watermarks, or private notes between people who both have the tool — not as a way to evade moderation.

How to use Image steganography

1. 1Drop a cover image and choose Hide or Reveal.
2. 2For Hide, enter a message (and optional passphrase), then download the PNG.
3. 3For Reveal, drop the PNG and read the recovered message.

What it won't do

• ·RGB LSBs only; alpha is left alone.
• ·Social recompression and format conversion destroy the payload.

Common questions

Related tools

• Text steganographyHide a short message in ordinary text with zero-width characters. Optional passphrase XOR.
• Device mockupDrop a screenshot into a generic phone, tablet, or laptop frame.