An application form almost never asks for one image. It asks for a passport-style photo, a scan of an ID, proof of address, and sometimes a signature or a supporting document. Each one has its own rule — the photo has a dimension spec, the ID scan has a readability requirement, the proof of address just needs to be under a size cap — and they all get uploaded through the same tiny field with no guidance.\n\nThat makes a batch workflow the right shape for this job. Compress the lot in one pass with a setting that keeps document text readable, then check the per-file sizes before you attach anything. Skwish lets you resize and compress multiple files at once, shows each resulting size, and exports a single ZIP, so an application with six attachments is one operation instead of six. Everything runs in the browser — identity documents never leave your device, which matters for this kind of paperwork.