textblindwatermark

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

算法	说明
migrate tank	Show different images under different backgrounds
hide as image	Store data as an image
hide in image	Hide data inside an image
image seed	Merge image and file together
EXIF	Embed data in image EXIF metadata
hide as music	Store data as audio
hide in music	Hide data inside audio
hide as text	Store data as plain text
hide in text	Hide data within readable text