Built for the upload box that says “max 200 KB”.
Anyone who has applied to an Indian government portal, a university admission form or a recruitment site knows the routine. The form wants your marksheet as a PDF under a set size. Your scan is 4 MB. The upload fails. So you search for a website that compresses PDFs.
Uploading your marksheet to a random compression site is exactly the thing you should not do — it carries your name, your photo and your roll number.
Zx Scanner is built so you never have to. Scanning, text recognition and compression all happen on your phone. Your documents are never uploaded anywhere in order to be processed, because there is nowhere for them to be uploaded to.

