Image Steganography Tool

Embed and extract hidden encrypted messages inside PNG and JPEG image pixels using Least Significant Bit (LSB) encoding with AES encryption and passphrases.

Deep-Dive Educational Guide

Steganography Masterclass: How to Conceal Secrets in Digital Images and Audio

A practical, mathematical guide to modern steganography: LSB spatial embedding, discrete cosine transforms (DCT), high-frequency audio phase encoding, and forensic steganalysis detection.

Read Companion Guide →

How to Use Image Steganography Tool

  1. Upload Carrier Image (PNG/BMP): Select a lossless cover image to act as the carrier for your secret payload.
  2. Enter Secret Message & Passphrase: Type the confidential text to hide and optionally set an encryption password to secure the payload.
  3. Download Stego Image or Decode: The tool modifies the Least Significant Bits (LSB) of pixel channels without visible alteration, exporting a pristine stego image.

Frequently Asked Questions

Why are PNG images preferred over JPEG for steganography?

PNG uses lossless compression, preserving exact pixel color values. JPEG uses lossy compression that alters low-order pixel bits, corrupting LSB steganographic payloads.

How much data can be hidden in an image?

With 1-bit LSB encoding across 3 color channels (RGB), an image can store approximately 3 bits per pixel (e.g. a 1920x1080 image can hide up to ~777 KB of data).