Tiny JPEG targets are almost always signature fields. The trick is that portals often enforce a minimum too — a 4 KB scan gets rejected just like a 40 KB one. ExactKB handles both directions: it compresses down to the cap and pads up past the floor.
How it works
- Check the target. This page is preset for the spec above — adjust any number to match your exact form.
- Drop your photo. ExactKB finds the best quality and dimensions that land inside the size window — including padding files up when a form has a minimum size.
- Download. The file fits the requirement on the first try.
FAQ
My signature scan is already tiny and still gets rejected. Why?
Most likely it's below the form's minimum size. Enter the minimum KB and ExactKB will grow the file into the accepted range.
Is my photo uploaded to a server?
No. ExactKB runs entirely in your browser. Your file never leaves your device — this page even works offline.