Passport and ID photo dimensions, without the guesswork
35×45 mm and 2×2 inch are print sizes. The tool exports pixels. It does not certify the photo.
Most “passport photo” rejections are size and background, not a mystery biometric score. A print size such as 35×45 mm is a physical rectangle. The file you upload is pixels. Mixing the two up is how a 600×600 crop gets rejected by a form that wanted 413×531.
Pick the preset, then place the face
In Passport and ID photo size, choose the print size. The pixel size is shown next to it: 35×45 mm is 413×531 px, and 2×2 inch is 600×600 px. Drag and zoom until the head sits in the frame with space above the hair. Custom width and height stay hidden until you choose Custom.
The background color fills space that is already empty or transparent. It does not cut a person out of a living room. If the wall behind you is busy, retake the photo on a plain wall. Do not expect the tool to replace that wall.
What this does not do
The download is a JPG at the pixel size you selected, under the KB limit if you set one. It does not measure the face against a government specification, and it does not mean an embassy will accept the file. Read the form. If it also caps the file at 200 KB, follow with Compress image to a size and confirm the result is still the same pixel size.
The portrait is processed in the browser and is not uploaded.