Why some document photos must not be edited

Three wordings, three different answers

The UK asks for a photo "unaltered by computer software" and publishes no definition of what that covers. Resizing a file to the published pixel minimum is arguably not altering the photograph, and HM Passport Office has not said. So `/passport-photo-uk` resizes, states exactly what it changed - size and file weight, never appearance - and leaves the judgement with you.

Canada leaves no room. IRCC requires an original photo "not taken from an existing photo or altered in any way", and then defines alteration: cropping, editing facial features, removing blemishes, and technical corrections such as changes to colour, brightness, contrast or sharpness. Cropping is on that list. So is sharpening.

New Zealand is equally explicit and names the tools: "You cannot manipulate or digitally alter your photo using Artificial Intelligence (AI) or other digital editing tools."

What that means when your file is rejected

It depends entirely on why.

1. 1The file is the wrong size or format, and editing is permitted. Fix it. This is arithmetic and takes a minute.
2. 2The file is the wrong size or format, and editing is prohibited. Go back to whoever took the photograph and ask for a different export. A photographer can produce a file at a different pixel size from the original capture without editing the photograph - that is a different act from you cropping the one you have.
3. 3The photograph itself is wrong. Background, shadow, expression, obstruction. No authority's rules matter here because no tool can fix it. That is another photo session.

Why a checker is still worth having

Measuring is not altering. Reading a file's dimensions, byte count and format changes nothing about it, and it answers the question people actually get rejected over - a 6 MB file where the limit is 4 MB, or a JPEG that is 480 KB where the floor is 512 KB.

That is the whole design of the pages here for those authorities: they read your file, tell you which published figures it meets, and give you nothing to download. A download button on a page whose own authority prohibits editing would be a control you have been told not to use, and a note underneath would not undo it.

The trap nobody mentions

Your phone may already have edited it. Portrait modes, beauty filters and automatic skin smoothing are on by default on a number of cameras, and they are applied at capture. A photograph that looks untouched to you may have been retouched before you ever saw it.

If your authority prohibits alteration, turning those off before the photograph is taken matters more than anything you do to the file afterwards.

Frequently asked questions

Does resizing count as editing a passport photo?

It depends on the authority and you should read their wording rather than assume. Canada explicitly counts cropping and technical corrections as alteration, which covers a resize. The UK says "unaltered by computer software" without defining it, so the judgement is yours. Where an authority names editing software, treat a resize as prohibited.

Why does this site refuse to resize some document photos?

Because the authority for that document prohibits it in terms that leave no room. Offering the button anyway, with a warning underneath, would be worse than not offering it - people press buttons and skim notes. Those pages measure instead, which is the part that helps without breaking the rule.

Can I use an AI tool to improve my visa photo?

Immigration New Zealand names artificial intelligence explicitly as prohibited, and Canada's definition of alteration covers what such a tool does. An AI assessment that looks at your photograph and tells you what it sees is a different thing from one that changes it - the first is a second opinion, the second is the thing the rule forbids.