How to compress your PDF
- 1
Add your PDF.
- 2
The Strong level is preselected for the smallest result.
- 3
Click Compress and download the smaller PDF.
Strongest compression
The Strong level resizes images to about 1,000 pixels on the long side and uses heavy JPEG compression. Pages remain readable on screen, but photos look soft.
Use it when a hard limit matters more than image detail: portals with tiny caps, or sending over a slow connection.
Private by design
Your file is processed by your own browser, in memory. It is never uploaded, stored or seen by anyone, and the page’s security policy blocks it from sending data to other servers.
Frequently asked questions
How do I compress a PDF?
Add the PDF, choose a compression level (or a target size), then click Compress PDF. The result shows the before and after size.
Will compression make my PDF blurry?
Text and vector graphics are never touched, so they stay sharp. Only images are recompressed. Light keeps images close to the original; Strong is visibly softer on photos.
Why didn’t my PDF get much smaller?
PDFs made from text (exported from Word, for example) contain few images, so there is little to compress. Large savings come from scans and photos.
How small does a PDF need to be for email?
Gmail and Yahoo accept attachments up to 25 MB, Outlook.com up to 20 MB. Staying under 10 MB is safest because some company mail servers set lower limits.
Is it safe to use with confidential documents?
Yes. The file is opened by your own browser and processed in your device’s memory. It is never uploaded, so no server, including ours, ever receives a copy. That makes it suitable for contracts, IDs, medical or bank documents.
Is it really free?
Yes. There is no sign-up, no watermark, no daily limit and no paid tier hiding the useful settings. Because your device does the work, it costs us almost nothing to run.