LSB Image Steganography
LSB隐写图片隐藏文字数字水印信息隐藏
Upload an image to see its capacity, embed secret text into pixel least significant bits and download a visually identical lossless PNG, for information hiding and watermarks, fully local.
🖼️ Click or drag an image (PNG, JPG, GIF, WebP, BMP...)
All processing is done locally in your browser. No data is uploaded.
How to Use
- Paste any valid JSON, supports nesting, arrays and escapes
- Click Beautify to auto indent and format
- Click Minify to remove whitespace into one line
- All operations run locally for privacy
Related Tools
FAQ
Can anyone see the difference?
No. Only the lowest bit of each channel changes, keeping the image visually identical; extraction requires a dedicated tool.
How much text can one image hold?
Roughly width × height × 3 ÷ 8 bytes minus header overhead; e.g. a 1000×1000 image holds about 370k characters. Exact capacity shows after upload.
What format should I save the stego image as?
Always use lossless formats like PNG; JPEG's lossy compression destroys the hidden data.