A Google Forms file-upload question is the quietest source of upload pain there is. The form owner sets a size cap, respondents never see it until their file is rejected, and a phone photo of a document is routinely 3-6MB. The error message is generic, the fix is not obvious, and the respondent is usually filling in the form on a deadline.\n\nThe actual work is simple: bring each photo under the cap while keeping the contents readable. For document photos that means resolution stays high enough to read the text, and quality drops only as far as needed. Skwish resizes and compresses in the browser, so nothing is uploaded to a third server just to shrink a form attachment. Batch the whole folder at once and export a single ZIP.