Font Steganography - Encode Message

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Hide a secret message in a PDF using font steganography. The message will be embedded using different font sizes that are nearly imperceptible to the human eye.

Select the PDF file to embed the secret message in
0 / 200 characters
The message to hide in the PDF (maximum 200 characters)
0 characters (0 non-space)
Cover text that will be displayed. Must have enough non-space characters to hide your message.
Requirements Check:
Enter your secret message and cover text to see if they are compatible.

How Font Steganography Works

Font steganography hides information by varying the font sizes of characters in text:

Requirements

Your cover text must have enough non-space characters to hide your message. Each character in your secret message requires 8 bits (8 non-space characters in the cover text).

Security Note

While the font size differences are subtle, they can be detected by analyzing the PDF's text properties. This method is best for scenarios where casual observers won't examine the document structure.