Privacy Policy
Last updated: September 5, 2026
How we process images
When you use Stamp Extractor, your image is uploaded over an encrypted connection and processed on our servers only to perform the requested stamp-extraction operation. The tool does not extract stamps locally in your browser.
Image retention
Uploaded and processed images are retained only temporarily. Our configured storage lifecycle removes files after up to seven days. Download and save your result promptly, because a deleted file cannot be recovered.
No AI training on your images
Stamp extraction uses our own deterministic color-confidence algorithm, not AI recognition. Your uploaded images are never used to train any model and are not used for advertising.
Your responsibility
Please only upload images that you own or are authorized to process. Read our Terms of Service for permitted uses. If you have a privacy question, email us at yukai_tool@163.com.