Passport and ID photo requirements overview

Official ID photos look simple, but they combine optics, geometry, and bureaucratic detail. This page explains the concepts in plain language so you can interpret embassy checklists and use our generator without guessing. It is educational content only—not a substitute for the rules published by your passport office, consulate, or licensing agency.

1. Physical size vs. digital dimensions

Most requirements specify the printed width and height in millimetres (for example 35×45 mm) and may also specify a minimum resolution in pixels for online submission. The relationship between millimetres and pixels is controlled by DPI (or pixels per inch). At 300 DPI, one inch equals 300 pixels; 25.4 mm equal one inch. If your checklist gives both mm and pixels, match the pixel count—they were computed for you. If only millimetres are given, 300 DPI is a safe starting point for printing, but online portals sometimes cap file size or dimensions differently.

Size and pixel reference (300 and 600 DPI)

The table below lists common document formats with exact millimetre dimensions and the equivalent pixel width × height at 300 DPI (typical print) and 600 DPI (high-resolution kiosks). Click a row to open the full country guide.

Pixel counts use the standard formula: pixels = (millimetres ÷ 25.4) × DPI. Online portals sometimes specify exact pixel ranges that differ slightly—when both mm and px are listed on an official form, match the pixel values.

Step-by-step: US passport vs Netherlands ID photo

These two formats illustrate how much country selection matters—the workflow is similar, but the numbers are not interchangeable.

2. Head size and eye position

Authorities rarely care about the empty margin for its own sake; they care that your face is large enough to identify and centered enough to crop consistently for machine-readable documents. Guidelines often describe the face height as a percentage of the photo height, measured from chin to crown (hair may be excluded). Our on-screen frame is a practical aid: align the top of your head and chin to the guides, keep both eyes visible, and leave a little space above the hairline if the rules require it.

3. Background colour and uniformity

White and light grey are common for biometric passports; some countries prefer light blue or cream. The background should be uniform, without shadows, patterns, or textures. A painted wall with a desk lamp reflecting off it can fail even when the colour looks “mostly white”. Stand about half a metre from the wall to reduce shadows, and use a second light source to fill shadows on the side opposite your main window.

4. Lighting and skin tone

Harsh overhead lighting creates raccoon eyes; backlighting creates a halo that breaks segmentation. Soft, even light from the front—natural shade outdoors or a window with a white curtain—usually renders skin tones accurately. Avoid beauty filters and heavy HDR; embassies expect a natural appearance. If you use our enhance step, keep adjustments subtle so facial structure stays unchanged.

5. Colour profile and file format

JPEG is widely accepted; PNG may be required where lossless transparency matters. sRGB is the safest colour space for web uploads. If your printer uses a different profile, convert explicitly rather than letting the OS guess—unexpected colour shifts can push a background out of spec.

6. Regional differences (summary)

United States passport-style photos often use a 51×51 mm (2×2 in) print with a white or off-white background and a specific head-to-photo ratio. European Union ICAO standards align many member states around 35×45 mm with a neutral expression and even lighting. United Kingdom guidelines emphasize contrast and definition against the background. Canada publishes strict digital criteria for online uploads. India and China often specify background colour and file size for digital forms. Always open the official PDF for your application type—third-party summaries go stale when rules change.

7. Using this site responsibly

Select your country and document type in the app, then compare the resulting frame to the official diagram. If the numbers differ, trust the authority. When you are satisfied, export at the DPI your checklist requires and print a test strip before you pay for a batch at a kiosk.

Country-specific guides

For step-by-step articles on specific documents, start with US passport photos (2×2 inch) and Schengen visa photos (35×45 mm). See the full country guides index for more. If your photo was returned, read why passport photos get rejected.

Disclaimer: We strive to keep presets aligned with commonly published specifications, but we do not represent any government. You are responsible for verifying dimensions, expression, background, and file format before submission.

Next steps: take better photos at home, or return to the generator.