We convert each page to an image, detect light gray / low-saturation pixels that match typical watermark patterns, and replace them with white. The original dark text and images remain untouched.

It works best on semi-transparent text watermarks (the most common type). Solid-color watermarks or image logos may require manual cleanup.

Only remove watermarks from content you own or have explicit permission to modify. Removing copyright watermarks from third-party content may violate intellectual property laws.