PDF — Free

Compress PDF to 100 KB

Shrink scans and forms under 100 KB for strict portals.

Drop a file to begin. Free

Drop files herePDF · any size · up to 500 at once

01 — Steps

How to compress PDF to 100 KB

Add the PDF
Drop a scanned form, certificate or document.
Let it fit
Images are re-encoded and downsampled step by step until the file is under 100 KB.
Download
Check the ✓ and page previews, then save it.

02 — Questions

Will a multi-page scan fit in 100 KB?

Usually for one to three pages. Long scans may not; the result then shows the smallest size reached, and splitting the PDF helps.

Will it stay readable?

Byhand stops at about 600 px per image. It will not blur a scan past that just to hit a number; it tells you instead.

Is 100 KB counted as 100,000 bytes?

Yes, so the file passes limits that count 1 KB as 1,000 or 1,024 bytes.

04 — More