Compress PDF to 150 KB
Compress a PDF to 150 KB when a form allows a little more room than the usual 100 KB: two or three scanned pages stay comfortably readable at this size.
When 150 KB is the limit
Some admission and certification portals set 150 KB per document, often for files that naturally have two pages, like a two-sided ID card, a transcript with a back page or a short reference letter. The extra 50 KB over the common 100 KB limit makes a visible difference: scans can keep a higher resolution, so small print and stamps stay legible.
What fits in 150 KB
- Two to three scanned pages at a resolution where small print stays readable.
- Both sides of an ID card or a driving license in one file.
- A typed document of 30 to 60 pages.
- One page with a large color photo at good quality.
Making the most of 150 KB
- 1Put both sides of a card on one page before scanning; one page costs less than two.
- 2Crop away the empty table or desk around a phone photo with Crop PDF; blank areas still take space.
- 3If your file starts below 150 KB, there is nothing to do: the page tells you before you click.
Questions about compressing to 150 KB
Can I aim for a size other than the presets?+
Yes. Choose Custom and type any size, for example 120 KB or 1.5 MB. The tool aims just under it.
Why does my result say "under your 150 KB target" but the size looks smaller?+
The tool stops as soon as the file fits with the best image quality it can keep, which often lands a few kilobytes below the limit.
What happens to the text in my PDF?+
Nothing. Text, fonts and layout are kept exactly; only images are resized and re-encoded.
Are my files private?+
Yes. The PDF is processed in your browser and never uploaded to a server.
My file is just above 150 KB. Will it lose much quality?+
Very little. The tool changes images only as much as needed, so a 170 KB file only loses a little resolution on its photos, and its text not at all.