Compress a PDF online
To compress a PDF, open the PDF tool, add your file, choose a target size such as 100 KB, 200 KB or 1 MB and press Compress. The tool re-draws the pages at the best quality that fits, and checks the result before you download. Your PDF stays on your device.
Compress a PDF →Free · no signup · your files never leave your device
How it works
- Open the PDF tool and add your PDF.
- Choose the size you need, or type your own in KB.
- Press Compress and download the smaller PDF.
Why scanned PDFs are big
A scanned page is a picture. Scanning at 600 dpi in colour can make a single page several megabytes. Scanning at 150 to 200 dpi in grayscale keeps the text readable and the file small.
Common targets
- 100 KB or 200 KB: IDs, certificates and application forms.
- 500 KB: longer documents.
- 1 MB or 2 MB: email attachments and portals with a 1 or 2 MB limit.
Need only some pages?
Split the PDF to keep just the pages you need, then compress. Fewer pages means a smaller file with no loss of quality.
Questions people ask
How do I compress a PDF to under 200 KB?
Choose 200 KB as the target in the PDF tool, or use the compress to 200 KB page.
Will the text stay readable?
Usually yes. Very long, high-resolution scans squeezed into a very small size can look soft: split them or scan at a lower resolution.
Is it safe for ID documents?
Yes: the PDF is processed in your browser and never uploaded.
Is it free?
Yes. No signup, no watermark, no limit on the number of files.