Compress PDF to 100KB

Compress a PDF to 100 KB or under, for forms with a size limit.

Your files stay on your device — nothing is uploaded.

How to compress a PDF to 100KB

  1. Drop your PDF on the box above, or click to choose it.
  2. The tool works down toward 100 KB on its own.
  3. Wait while it processes the pages.
  4. Check the final size and download.

Why a 100KB PDF limit exists

Some upload forms cap a PDF at 100 KB, often for a short document like a single signed form, a certificate, or a one-page application. A scanned page straight from a phone or scanner is far larger than that, so the form rejects it. This tool brings the file down to size.

How it reaches the target

The tool re-draws each page as an image and lowers the quality and resolution over a few passes until the file is 100 KB or under. Because the pages become images, the text turns into a picture and is no longer selectable. For a tight target like 100 KB, small text can get soft, so this works best for a short scan rather than a dense multi-page document.

When 100KB is too tight

If your PDF has many pages or very fine print, 100 KB may not be reachable while keeping it readable. The tool will tell you the smallest size it could reach so you know where you stand. In that case, try the 200 KB tool, or split the document and send fewer pages.

FAQ

Will the text still be selectable?

No. Reaching a small target means turning pages into images, so the text becomes part of the picture. Keep the original if you need live text.

It could not reach 100KB. What now?

Your file may be too long or too detailed for that size. Try the 200 KB tool, or remove pages you do not need first.

Is 100KB enough for a readable page?

For a single short scan, yes. For dense pages of small text, a larger limit keeps them clearer.

Does it change the number of pages?

No. Every page is kept. Only the quality and resolution change to reach the size.

Are my files uploaded?

No. Everything runs in your browser and nothing is saved.

What kind of PDF can get under 100 KB?

Short ones: a one or two page scan, a form, or an ID document. To reduce a PDF to 100 KB the tool redraws each page as a compressed picture. A PDF under 100 KB with many pages will look soft, so split large files first.