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An invisible digital watermarking solution for PNG and JPG images to effectively protect your copyright and prevent image theft.
Click or drag image here to upload
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Max 512 KB • Max 1 files
Upload image and enter watermark content
Click to start processing
PX to PT Converter
A pixel (PX) to point (PT) unit conversion tool for designers and developers. Supports custom PPI for typography and layout adaptation.
PX to REM Converter
A bidirectional PX to REM converter for front-end developers and designers, featuring customizable root font sizes.
Pixel to Centimeter Converter
Accurately convert pixel lengths to physical centimeter dimensions based on PPI (Pixels Per Inch). Ideal for UI design, print layouts, and screen adaptation.
Pixel to Millimeter Converter
Accurately calculate the physical dimensions between pixels and millimeters based on PPI density. Ideal for UI design and print typography.
PX to PT Converter
A pixel (PX) to point (PT) unit conversion tool for designers and developers. Supports custom PPI for typography and layout adaptation.
PX to REM Converter
A bidirectional PX to REM converter for front-end developers and designers, featuring customizable root font sizes.
Pixel to Centimeter Converter
Accurately convert pixel lengths to physical centimeter dimensions based on PPI (Pixels Per Inch). Ideal for UI design, print layouts, and screen adaptation.
Pixel to Millimeter Converter
Accurately calculate the physical dimensions between pixels and millimeters based on PPI density. Ideal for UI design and print typography.
Online JWT Parser & Decoder
Parse JWT headers, payloads, and key information online. No installation required—just paste and decode.
When your original images are shared online, traditional watermarks can ruin their visual appeal. This tool uses frequency domain transformation to embed text information invisibly into image pixels, creating an extractable proof of copyright. A blind watermark is a hidden identifier embedded in the image's frequency domain using Discrete Cosine Transform (DCT), which requires a specific algorithm to extract.
Q: How do I verify an embedded blind watermark?
You need a dedicated extraction tool to decode the frequency domain information. This tool only provides the embedding service.
Q: Will image compression destroy the blind watermark?
Lossy JPEG compression may cause the watermark to fail. We highly recommend using the PNG format.
For commercial use, we recommend including a timestamp and a unique ID in the watermark. Secondary compression by social media platforms may destroy the watermark. Always keep the original, unwatermarked files for important images.
Typical application: Photographers can embed "Copyright 2024-{ClientID}" into sample photos before delivery. Tests show that an 800×600px image can stably hold 50 characters of text and remain recognizable even after three rounds of JPEG compression (at 80% quality).
