How it works
- Add your PDF. This page starts with the 150 KB target selected.
- 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
- A few pages of mostly text usually have a fair chance. Photos and scans take more room.
- Because the tool stops at the first resolution that fits, the result lands under the target, not exactly on it.
- Read the result at 100% before you submit it. Lower resolutions soften small text.
What a test showed
- One-page A4 scan, 474 KB: the result was 115 KB.
- Ten-page A4 scan, 4.7 MB: the smallest result was 274 KB, so 150 KB was missed.
- If your file is already under 150 KB, no new file is made and the tool says so.
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.