Steganography Tool

Hide secret messages inside images using LSB steganography in your browser

🔒 100% Secure: All image processing happens locally in your browser. Images and messages are never uploaded.

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Upload Image to Hide Message

PNG, JPG, WEBP supported (PNG recommended)

How to Use the Steganography Tool

Hide Message in Image

1Select Hide Message mode
2Upload an image (PNG recommended)
3Enter your secret message
4Optionally add password protection
5Click Encode Message
6Download the encoded image

Extract Hidden Message

1Select Extract Message mode
2Upload the encoded image
3Enter password if protected
4Select the encoding strength used
5Click Extract Message
6View and copy the hidden message

Key Features

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LSB Steganography

Uses Least Significant Bit technique to hide data invisibly in image pixels

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Password Protection

Optional encryption layer for extra security of hidden messages

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Capacity Calculator

Automatically calculates maximum message size based on image dimensions

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Encoding Strength

Choose between low, balanced, or high strength encoding

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Binary Visualization

See how pixel bits are modified to hide your message

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100% Client-Side

All processing happens locally. No images uploaded to servers

What is Steganography?

Steganography is the practice of hiding secret information within ordinary files or messages. Unlike encryption which scrambles data, steganography conceals the very existence of the data.

This tool uses LSB (Least Significant Bit) steganography, which modifies the last bit of pixel color values to encode your message. Since changing the LSB only alters the color value by ±1, the changes are invisible to the human eye.

How LSB Steganography Works

•Pixel modification: Each pixel has RGB values (0-255). Only the last bit is changed
•Invisible changes: Changing 10101010 to 10101011 is visually undetectable
•High capacity: A 1920×1080 image can hide over 700KB of text
•Lossless format: PNG preserves the hidden data, JPEG may corrupt it

Encoding Strength Levels

Low Strength

Encodes message in consecutive pixels. Faster processing but message is concentrated in one area.

Best for: Quick encoding, small messages

Balanced (Recommended)

Distributes message across pixels with moderate spacing. Good balance of speed and distribution.

Best for: General use, recommended default

High Strength

Spreads message across more pixels with wider spacing. More secure but slower processing.

Best for: Maximum security, sensitive messages

Common Use Cases

🔒 Secure Communication

Send hidden messages through public channels without detection

🎓 Educational Purposes

Learn about steganography and information hiding techniques

🔐 Digital Watermarking

Embed copyright or ownership information in images

📝 Secret Notes

Hide personal notes or passwords within innocent-looking images

🎮 Puzzle Games

Create treasure hunts or ARGs with hidden clues in images

🔬 Research

Study information hiding and digital forensics

🛡️ Best Practices

✅ Use PNG Format

PNG is lossless and preserves hidden data. JPEG compression may corrupt the message

✅ Add Password Protection

For sensitive messages, always use password protection for an extra security layer

✅ Check Message Capacity

Ensure your message fits within the image capacity to avoid encoding errors

✅ Remember Encoding Settings

Note the encoding strength used - you'll need it to extract the message

✅ Avoid Re-compression

Don't upload encoded images to services that compress them (social media, etc.)

Frequently Asked Questions

Are my images uploaded to a server?

No. All image processing happens locally in your browser using the Canvas API. Your images and messages never leave your device.

Can the hidden message be detected?

LSB steganography is visually undetectable. However, specialized steganalysis tools can detect the presence of hidden data through statistical analysis.

What image format should I use?

PNG is strongly recommended as it's lossless. JPEG uses lossy compression which may corrupt the hidden message.

How much text can I hide?

It depends on image size. A 1920×1080 image can hide approximately 700,000 characters. The tool shows capacity for each image.

What if I forget the password?

The message cannot be recovered without the correct password. Make sure to remember or securely store your password.

Can I hide files instead of text?

This tool is designed for text messages only. For file hiding, you would need specialized steganography software.

Is this secure for sensitive data?

While LSB steganography hides data well, it's not cryptographically secure. For highly sensitive data, combine with strong encryption.

Technical Details

How It Works

The tool uses the HTML5 Canvas API to read and modify pixel data. Each pixel's RGB values are converted to binary, and the message bits replace the least significant bits. A 32-bit header stores the message length for extraction.

Encryption Method

When password protection is enabled, the message is encrypted using XOR cipher before embedding. While simple, it provides basic protection against casual inspection.