Compress PDF
Shrink PDFs to fit upload limits like 200 KB or 1 MB, without losing readable text. Free, with no sign-up.
Nothing is uploaded. Your files stay private.
Popular sizes
Opens the tool with the right settings already chosen.
How to compress a PDF
Three steps, about ten seconds.
- 01
Add your PDF
Drop it in the box above, or tap to choose from your phone or computer.
- 02
Pick a target
Choose a size like "Under 200 KB" for portals, or keep the best-quality default.
- 03
Download
Check the new size and save the file. Done.
Good to know
Most of a PDF's size usually comes from the pictures inside it: scanned pages, photos and stamps. Quikdo finds those images and re-saves them at a sensible resolution and quality, while the text and layout are left exactly as they were. That's why a 5 MB scan can often drop to a few hundred kilobytes and still read clearly.
Pick a target when a portal has a limit. Quikdo tries the highest quality first and steps down only as far as needed to get under your target. If a file is still too big at the lowest setting, it usually means there are many high-resolution scanned pages. Remove pages you don't need, or rescan at a lower resolution.
PDFs that contain only text and drawings are usually small already, so they won't shrink much. Password-protected PDFs need to be unlocked before they can be compressed. Always open the result and zoom in on signatures and stamps before you submit an important document.
Frequently asked questions
How do I make a PDF smaller?
Drop the PDF in. Quikdo re-saves the pictures inside it at a lower resolution and quality, which is where most of the size is. Pick a target like 200 KB if a portal has a limit.
How do I get a PDF under 200 KB?
Choose the 200 KB target before you drop the file in. Quality is lowered only as far as needed to get under it.
How do I convert a PDF from MB to KB?
Set a target in KB, such as 500 KB or 200 KB, and compress. A 3 MB scan often ends up a few hundred kilobytes.
Can I compress a PDF without losing quality?
Typed text and drawings aren't changed, so they stay sharp. Pictures inside the PDF are re-saved, so very small targets make scans look softer. Use the largest target the portal allows.
Is this PDF compressor free?
Yes. You can compress one file at a time up to 10 MB for free.
Is my PDF uploaded to compress it?
No. Your browser does the compressing on your own device, so the PDF isn't sent to Quikdo.
Does it work on iPhone and Android?
Yes. Open this page in your phone browser, tap the drop area and pick a file from Files, Drive or your downloads.