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Security & Privacy Workspace

Image Steganography

Hide secret text messages inside any image, or extract them back. All computations happen 100% locally in your browser.

Drag & drop an image here, or browse
Supports PNG, JPG, WEBP, BMP up to 30MB. Click to upload.

Encoding Options

Characters: 0

If provided, the message is encrypted before embedding so only those with the password can read it.

Self-Help Desk

Frequently Asked Questions

Learn more about how image steganography hides data within pixel levels.

What is Image Steganography?
Steganography is the practice of concealing a secret message, file, or image within another file. Unlike cryptography, which scrambles a message to make it unreadable, steganography hides the very fact that a communication is taking place, making the carrier file look completely normal.
How does this tool hide text in an image?
This tool utilizes a client-side **Least Significant Bit (LSB)** canvas algorithm. It breaks down the character bits of your message and embeds them into the lowest bit of the Red, Green, and Blue channels of the image pixels. Because the color values are modified by at most 1 unit (e.g. from 254 to 255), the human eye cannot distinguish any difference whatsoever.
Why is the output saved as a PNG rather than JPG?
JPEG compression is lossy, meaning it modifies and approximates pixel colors to save file size. Doing this completely destroys the hidden binary bits embedded in the pixel LSBs. **PNG** is a lossless format, which preserves the exact color bytes of every single pixel, ensuring your hidden data remains fully intact and extractable.
How secure is the password protection option?
If you enter a password, the text message is encrypted using standard cryptography algorithms (e.g., a lightweight cipher or XOR with a salted MD5/SHA-256 derived key stream) before it is embedded into the pixel canvas. Even if someone knows the image contains steganography, they cannot read the secret message without providing the correct password.