How to get a PDF under 100 KB
Choose your PDF
Pick the document the form is asking for. The 100 KB limit is already selected.
Press Compress PDF
We try a range of quality settings on your device and keep the sharpest version that fits.
Check and download
You'll see the final size in bytes. Open the file once to check it's readable, then upload it.
About this tool
100 KB is a tight limit, and it suits one or two pages best. A phone photo of a document is often 2 to 4 MB, so getting it under 100 KB means saving each page as a smaller image. We try sharper settings first and only go softer if we have to, so the text stays as readable as the limit allows.
We aim just under the limit, below 100,000 bytes, so the file is accepted whether a site counts a kilobyte as 1,000 or 1,024 bytes. If the PDF has a lot of pages and even the smallest readable version is over 100 KB, we'll say so and show the size we reached, instead of giving you a file that will be rejected.
Need a different limit? Use the 200 KB or 500 KB pages, or choose Exact size on Compress PDF and type any size.
Questions
How do I reduce a PDF to under 100 KB?
Choose your PDF on this page and press Compress PDF. The 100 KB limit is already set. The tool tries different quality levels on your device, keeps the best one that fits under 100 KB and tells you the exact size before you download.
Why is my PDF still over 100 KB?
Usually because it has several pages or very detailed photos. 100 KB fits about one or two pages. Split the file so each part has fewer pages, or remove pages the form doesn't need, then compress again.
Will the text still be readable?
Yes for most documents. To reach 100 KB, pages are saved as images, so the text can be read but not selected or copied. Open the result to check it before you upload it.
Is 100 KB counted as 100,000 or 102,400 bytes?
Sites differ, so we aim below 100,000 bytes. That keeps the file under the limit either way.
Is my document uploaded?
No. The compression runs in your browser on your own device. Your file is never sent anywhere, which matters for IDs and certificates.