How it works
- Add your PDF. This page starts with the 20 KB target selected. The other sizes are in the same box.
- The tool tries 150 DPI first, then lower resolutions down to 48 DPI, and stops as soon as the file is under the target.
- If the target cannot be reached, you get the smallest result with a note. If even that is larger than your original, the tool says so and gives no file.
When this size fits
- 20 KB is very small. A single page with plain text and no photos has the best chance.
- Fewer pages help most. If you only need page 1, split it out first with Split PDF.
- Cropping white margins first can also help, since a smaller page area means fewer pixels to store.
What a test showed
- One-page A4 scan, 474 KB: the smallest result was 28 KB, so the 20 KB target was missed and you get the 28 KB file with a note.
- Ten-page A4 scan, 4.7 MB: the smallest result was 274 KB, far from 20 KB.
- Files this small usually need a single page. If the tool cannot reach 20 KB, it says so instead of hiding it.
Test numbers come from synthetic files made for this page: a one-page A4 scan (474 KB) and a ten-page A4 scan (4.7 MB), both noisy 150 DPI images. Real files behave differently, so treat them as a guide.
Limits
- Pages become JPEG images: selectable text, links, forms and signatures are lost.
- Sizes use 1 KB = 1,000 bytes. Up to 30 MiB and 100 pages per file.