JPG to PDF under 100 KB

Convert JPG photos or scans into one PDF under 100 KB for an upload form. Reorder the pages, pick A4 or US Letter, and see the size. Free, no upload.

How do I turn photos into a PDF under 100 KB?

To turn JPG photos into a PDF under 100 KB, SafeResize puts them on A4 or US Letter pages and lowers the sharpness until the PDF is 100,000 bytes or less, which passes whether a website counts 1 KB as 1,000 or 1,024 bytes.

100 KB in bytes	100,000 bytes, or 102,400 bytes when 1 KB is counted as 1,024 bytes, as Windows does
100 KB in MB	0.1 MB, or 0.0977 MB as Windows counts
The PDF you download	100,000 bytes or less, so both counts accept it. Windows shows it as 97.7 KB or less.
Each page gets, shared evenly	About 50 KB with 2 pages, or 20 KB with 5
Sharpness of each page	150 DPI first, then 120, 100, 80 and 60 DPI, stopping at the first that fits

Before you start

A single phone photo is often 2 to 5 MB, and a PDF made from it keeps that size. To fit a 100 KB limit, the pages have to shrink by well over 90%.

The tool below opens with "Under 100 KB" already chosen. Add your photos, put them in order, and press "Make my PDF". SafeResize lowers the sharpness only as far as it has to, and the result page shows the size and the sharpness (DPI) it used.

Tips

Tick "Black & white" for printed text and forms. It makes the file much smaller.

Use as few pages as you can. Every extra page takes space from the others: 100 KB shared over 3 pages is about 33 KB each.

Cut off tables, shadows and empty edges in your phone before you add the photo. Less to store means a sharper PDF at the same size.

Questions and answers

Can a PDF of several photos really be under 100 KB?

For a few simple pages, yes. Many pages or busy colour photos may not fit. The result page tells you the size, and says so if it is over the limit.

Will the text stay readable?

For one to three pages of a typical document, usually. The result page shows page 1 exactly as saved, so zoom in on small print before you upload.

Which paper size should I choose?

A4 is used in most countries. US Letter is used in the United States, Canada and a few others, such as Mexico and the Philippines. If the form does not say, A4 is the safe choice.