PhotoPass - Passport and visa photos at home, checked before you submit
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PhotoPass turns a photo you took at home into a passport or visa photo that meets the official rules. Pick your document, add a photo, and it crops to the right size, sets your head at the required height and checks every rule it can measure, in plain words. What only you can judge, like glare on glasses, goes on a short list to tick off. 7 documents across India, the US, Germany and Canada. Your photo never leaves your browser: no upload, no account, works offline. Free.

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You find out your passport photo was wrong weeks later, when the application comes back. Head too small. Background not plain. File too big for the upload.
The rules are exact numbers, and they are different for every document. An OCI card wants the head at 70 to 80% of a square photo. A US passport wants 1 to 1 3/8 inches on a 2 by 2 inch print. Nobody remembers that at home with a phone.