Carrier + text
photo.png + "meet at 9"
Output
PNG with hidden payload (appearance largely unchanged)
Encoding & Decoding
LSB Image Steganography Tool
Embed text into image pixels with LSB steganography and export PNG, or extract hidden text from a stego image. Differences are usually not obvious visually. Processing stays in the browser—suited to learning LSB basics and lightweight invisible marks, not strong cryptographic secrecy.
SteganographyImageLSB
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Quick actions
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编码加解码
Image Steganography (LSB)
Embed text into image pixels with LSB steganography and export PNG, or extract hidden text from a stego image. Differences are usually not obvious visually. Processing stays in the browser—suited to learning LSB basics and lightweight invisible marks, not strong cryptographic secrecy.
Drop Image Here PNG recommended for lossless capability.
隐藏 / 嵌入
Embeds the text into the 2 least significant bits of the image pixels. Max capacity limited by image size.
— OR —
提取 / 解码
从当前图片提取隐藏文本（若有）。结果会覆盖上方文本框。
Use cases
- Demonstrate how LSB steganography works
- Embed a lightweight invisible mark in an original image
- Extract text from an LSB stego PNG shared for learning
How to use
- Upload a PNG or JPEG carrier and enter text to hide
- Embed and download the stego PNG
- To extract, upload the stego image and run decode
Example input and output
FAQ
Why must the export be PNG?
LSB data lives in least-significant pixel bits. Lossy JPEG compression can destroy them; PNG preserves the payload.
How much text can be hidden?
Capacity depends on pixel count. Ordinary photos can hold short messages; oversized payloads are rejected with an error.
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