What the checker measures
The checker estimates source resolution, average brightness and sharpness locally. Passport and visa modes also show a manual head-size guide based on current U.S. photo dimensions.
What it does not pretend to do
The site does not use face recognition to certify head placement, does not replace the background, and cannot guarantee approval. Final acceptance belongs to the receiving authority.
Why local processing matters
Identity photos are sensitive, so the core checker runs in your browser.
Use the receiving authority as the final source
Document-photo rules can change. Use this site to prepare dimensions and catch common image problems, then verify the latest requirements on the official website for the document you are submitting.