How to Check a Photo's Size, Dimensions, and Format Before Uploading

Most upload rejections come down to one of three properties: file size (in KB or MB), pixel dimensions (width × height), or format (JPG, PNG, WebP, HEIC). A fourth, aspect ratio, matters for passport-style photos.

Checking all of them before you upload turns a frustrating trial-and-error loop into a single pass.

Open the Form Photo Checker, enter the limits your form lists — maximum KB, required width and height, and accepted formats — then drop your photo in. You get a line-by-line pass/fail for each rule.

If anything fails, use Fix it to resize, compress, and re-encode in one step, then re-check the output.

The check runs entirely in your browser using the Canvas API. Your file, its name, and its metadata are never sent to a server — useful when the photo is an ID, passport, or signature.