Compress PDF to 100KB

Aim for 100 KB.

Drag and drop your PDF file here

Select a PDF to compress. Up to 100 MB.

Your file is processed on your device and is not sent to any server.

Shrinks JPEG images further: medium quality and at most 1400 pixels per side. It may show in photos and scans. The result depends on what is inside the PDF, and a particular reduction cannot be guaranteed.

How to use Compress PDF to 100KB

Select your PDF, or drag it onto the drop area. It stays on your device.
The tool opens on Maximum reduction, the strongest level, because you are aiming for about 100 KB. You can pick a gentler level if quality matters more.
Press Compress PDF. The tool re-saves the file and shrinks JPEG images inside it.
Read the result. It shows the real size and tells you whether the file is under 100 KB. Download it, or keep the original if the saving is small.

About this tool

100 KB is a common limit on application forms and portals. A short text PDF is often far below it, while a multi-page scan is usually far above it. The tool starts on Maximum reduction and reports the real size so you do not have to guess.

If your PDF came from photos, building it from images that are already small is more effective than squeezing the finished file. The JPG to PDF tool can make a PDF with a size target, and Split PDF can remove pages you do not need.

Limits and what to expect

Files up to 100 MB. The size in KB is a goal, not a promise: some PDFs cannot reach it without changing their content.
Only JPEG images inside the PDF are shrunk. Pages that are drawn as other image types stay as they are.
A digitally signed PDF loses its signature when it is compressed.

Tips

Check the limit on the form: some count 1 KB as 1,000 bytes, so aim a little under.
Remove extra pages before compressing.
For photos, shrink them first and then make the PDF.

Frequently asked questions

How do I reduce a PDF to under 100 KB?

Select the PDF and press Compress PDF on Maximum reduction. If it is still above 100 KB, remove pages with Split PDF or use fewer or smaller images.

Can every PDF be compressed to 100 KB?

No. A text-only PDF can often be very small, but a PDF made of scanned pages or many photos may stay larger because the images carry most of the size. The tool reports the real result and says if it is still above 100 KB.

Will the PDF look worse?

At the strongest level JPEG images are reduced to medium quality and at most 1400 pixels per side, which can show in photos and scans. Text and drawn lines are not reduced.

Is my file uploaded?

No. The file is read and processed in your browser on your own device. It is not sent to Paul Digital or any other server, and nothing is kept when you close the page.

Compress to a target size

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Privacy

Your file is processed in your browser on your own device. It is not uploaded to Paul Digital or any other server, and nothing is stored once you close the page.