What is the most frustrating image upload requirement you face?

I built CompressResize because I kept seeing forms ask for two constraints at once: exact pixel dimensions and a tiny maximum file size. Existing tools usually handle one, upload the file, or make the workflow slower than it should be.

CompressResize processes everything locally in the browser and includes exact-KB compression, resizing, batch jobs, and JPG, PNG and WebP comparison.

Before launch, I’d love to learn which requirement causes you the most trouble: a strict KB limit, exact dimensions, a specific format, or something else?