text_blind_watermark

Embed an invisible message (blind watermark) into text, without altering its readability or appearance.

• Try it online：https://www.guofei.site/os/text_wm.html
• Video demo：https://www.bilibili.com/video/BV1m3411s7kT
• Rust Version: https://github.com/guofei9987/hidden_watermark
• 中文 readme README_cn.md
• Source code: https://github.com/guofei9987/text_blind_watermark

✨ Features

• Invisible watermark embedding in plain text
• No visible difference in appearance
• Verified in platforms: macOS, Windows, Linux, WeChat, DingTalk, Zhihu, Chrome, etc

📦 Installation

pip install text_blind_watermark

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🛠 Usage

Embed a watermark into text

from text_blind_watermark import TextBlindWatermark

password = b"p@ssw0rd"
watermark = b"This is watermark"
original_text_file = 'files/file_txt.txt'
file_with_watermark = 'files/file_txt_with_watermark.txt'

with open(original_text_file, 'r') as f:
    text = f.read()

twm = TextBlindWatermark(pwd=password)

# embed watermark into the text
text_with_wm = twm.add_wm_rnd(text=text, wm=watermark)

# write into a new file
with open(file_with_watermark, 'w') as f:
    f.write(text_with_wm)

Extract the watermark

from text_blind_watermark import TextBlindWatermark

password = b"p@ssw0rd"
file_with_watermark = 'files/file_txt_with_watermark.txt'

with open(file_with_watermark, 'r') as f:
    text_with_wm_new = f.read()

twm = TextBlindWatermark(pwd=password)
watermark_extract = twm.extract(text_with_wm_new)
print(watermark_extract)

Output: This is watermark

🔗 Related Project: HideInfo