Free Online Seal Extractor - ATools

Free online Seal Extractor. Runs locally in your browser with zero uploads for privacy and speed.

Click to select image / Drag file here

快捷支持Press Ctrl + V to paste clipboard screenshot directly

Supports JPG, PNG, WebP and more. Extracted locally in your browser with zero uploads.

Don't have a seal image handy?

Tip: This tool uses pure client-side pixel processing to isolate red regions and make other pixels transparent. Cropping the seal region beforehand boosts stability; smart fill automatically closes small gaps and smooths edges based on the threshold.