Compress PDF to 50KB

Usually not readably. 50 KB leaves under 10 KB per page for five pages, which blurs small print. Upload only the pages the portal needs (use Split PDF to extract them), or check whether the portal allows a larger limit for multi-page documents.

Colour needs about three times as much information as grey. For a certificate or mark sheet, the colour of the paper adds nothing, so dropping it lets the same 50 KB hold far more detail in the text.

Crop away the empty margins of the scan before making the PDF, or rescan at a normal setting rather than at very high resolution with extra borders. Less empty paper means more of the 50 KB goes to the text. Our Compress Documents tool can clean up a phone photo of a page before it becomes a PDF.

It stays a standard PDF at the original page size, under 50,000 bytes, so it passes portals that count 1 KB as either 1,000 or 1,024 bytes. Portals also check the file type, which is a genuine PDF here.

Nothing is changed: you get your original file back, because re-compressing it would only lose quality.