Make a 35×45 mm or 2×2 inch passport photo
Crop a snapshot to the document size, export JPEG, keep the file on the device. Confirm DPI with the agency.
Pick a country preset or type millimetres. The frame keeps the ratio; DPI sets print pixels.
A 10×15 or A4 sheet tiles copies. Background and face-oval rules still come from the issuing office.
A common print size is 35×45 mm. At 300 dpi that is about 413×531 pixels. A 2×2 inch US-style photo is 600×600 pixels at the same dpi. The head should sit in the upper portion with a plain background, and the file for an online form is often asked in JPEG under a few hundred kilobytes. White balance matters more than a filter: a blue cast fails a check that a slightly soft JPEG still passes. This page opens the passport layout. Crop and compress are the neighbouring steps.
FAQ
Does it change the background?
No, it only fills canvas margins. Shoot on a plain backdrop.