The ICAO Photo Standard, Explained
ICAO Document 9303 is the International Civil Aviation Organization’s specification for machine-readable travel documents. It sets the portrait rules that let passport photos work with automated face recognition at borders. Countries build their national photo rules on top of it — which is why passport photos look so similar worldwide, but sizes and backgrounds still differ.
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Wrong background color
Using white when cream is required, or off-white when pure white is needed. Our AI detects and flags background issues instantly.
Shadows on face
Overhead or side lighting creates shadows that cause rejection. SnapID checks for even lighting on both sides of your face.
Incorrect head position
Head tilted, turned to the side, or not centered in the frame. Our AI measures exact positioning against official rules.
Eyes not visible
Closed eyes, hair covering eyes, or glare from glasses. Especially common with babies — our AI is trained to catch this.
Wrong dimensions
Each country has exact size requirements. SnapID auto-crops to the precise dimensions needed for your destination country.
Photo too old
Most countries require photos taken within 6 months. Reusing old photos is a common reason for application delays.
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What ICAO requires
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A full-face, frontal portrait. The face should take up about 70–80% of the photo height. Neutral expression with the mouth closed and both eyes open and visible. Even lighting with no shadows on the face or background, and no red-eye or glare. A plain, uniform, light background. Sharp focus and natural skin tones.
What ICAO leaves to each country
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The exact print size, head height in millimetres, background colour, and whether glasses are allowed are set nationally. The EU and UK use 35×45 mm; the US uses 2×2 in (51×51 mm); Canada uses 50×70 mm.
Related technical standards
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ICAO Doc 9303 refers to ISO/IEC 19794-5 (now succeeded by ISO/IEC 39794-5) for how the face image is encoded in the passport chip. These cover resolution, pose angles and image quality — the reason a photo can look fine to you and still fail an automated check.
How to get an ICAO-compliant photo
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Stand about 1–1.5 m from a plain light wall, face a window or soft light so both sides of your face are evenly lit, keep your head level, and use a timer or a helper rather than a selfie. Then check the photo against your country’s specific size and background rules.
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Upload Photo – Free CheckThe ICAO Photo Standard, Explained – Complete Guide
What ICAO requires: A full-face, frontal portrait. The face should take up about 70–80% of the photo height. Neutral expression with the mouth closed and both eyes open and visible. Even lighting with no shadows on the face or background, and no red-eye or glare. A plain, uniform, light background. Sharp focus and natural skin tones. What ICAO leaves to each country: The exact print size, head height in millimetres, background colour, and whether glasses are allowed are set nationally. The EU and UK use 35×45 mm; the US uses 2×2 in (51×51 mm); Canada uses 50×70 mm. Related technical standards: ICAO Doc 9303 refers to ISO/IEC 19794-5 (now succeeded by ISO/IEC 39794-5) for how the face image is encoded in the passport chip. These cover resolution, pose angles and image quality — the reason a photo can look fine to you and still fail an automated check. How to get an ICAO-compliant photo: S...
Frequently asked questions
What is an ICAO-compliant photo?
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A portrait that meets the ICAO Doc 9303 rules for machine-readable travel documents: full-face, neutral expression, eyes open, even lighting, plain background and correct face size.
Is ICAO the same as 35×45 mm?
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Not exactly. 35×45 mm is the most common print size among ICAO countries (EU, UK and many others), but ICAO itself doesn’t fix one print size — the US, for example, uses 2×2 inches.
Are glasses allowed under ICAO?
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ICAO allows clear glasses without glare or tinted lenses, but many countries (including the US and UK) ban glasses in passport photos entirely.
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