The published technical window
A digital passport photo must be JPG or JPEG, use a 3:4 portrait ratio, be 900–4500 pixels wide and 1200–6000 pixels high, and be between 250 KB and 5 MB.
RulePix checks without changing
The New Zealand profile checks the original file against all four technical rules. It does not claim to assess the person's pose, lighting, background, expression, age of photo, or identity.
Review the official content rules
Selfies are rejected, and detailed rules apply to how the photo is taken. Review the current New Zealand Passports guidance before applying.