Free online LSB steganography tool. Hide secret messages inside PNG images. 100% client-side processing β nothing is uploaded to any server.
Client-Side Β· Zero UploadWhat is LSB Steganography?
LSB (Least Significant Bit) steganography is a technique for hiding secret information within digital images. Each pixel consists of RGB color channels, each represented by 8 bits (0-255). By modifying the least significant bit of each channel, information can be stored without perceptible changes to the image.
Key Features
- Hide Messages: Embed text messages inside PNG images
- Extract Messages: Reveal hidden messages from stego images
- Password Protection: Optional XOR encryption with password
- Zero Upload: All processing happens in your browser
- Lossless Storage: Saved as PNG, no data degradation
Use Cases
Digital watermarking, covert communication, copyright protection, secure message passing, CTF challenges.
FAQ
What is LSB steganography?
LSB (Least Significant Bit) steganography hides information in the least significant bits of image pixels. The changes are invisible to the human eye.
Which image formats are supported?
PNG is recommended (lossless). JPG lossy compression destroys hidden data. BMP and WebP (lossless) are also supported.
How much data can I hide?
Capacity depends on image size. A 1000Γ1000 PNG can hide ~375KB of text (about 190,000 characters).
Is my data safe?
All processing happens in your browser. Images and messages are never uploaded to any server.
Does the image quality degrade?
Changes are imperceptible. LSB modifies the lowest bit of each color channel, affecting pixel values by at most 1/256.