Seal Extractor
Extract seal areas from scans or photos, customize color and tolerance, and generate transparent PNG seals locally in your browser.
Click or drag a seal image here
Scanned documents or photos are recommended. JPG/PNG formats are supported.
Tip: This tool uses pure frontend pixel-level processing to identify red regions and make other pixels transparent. Cropping the seal area first can improve recognition stability, and Smart Fill can repair small holes and smooth transitions based on the threshold.