Compress PDF
Shrink PDF file size in your browser so it fits email attachments and upload limits. Images are re-encoded and overhead is stripped without a round-trip to a server.
How to use this tool
- Upload the PDF you want to compress.
- Pick a mode: Balanced (recommended) recompresses images and keeps text selectable; Strong rasterizes for maximum savings on scans.
- Click Compress and watch the before/after size comparison.
- Download the smaller PDF once you are happy with the result.
Every tool here runs 100% inside your web browser. Your files are processed on your own device and are never uploaded to a server, so your documents stay completely private. The tools are free, with no signup, no email, no watermarks, and no page limits.
Frequently asked questions
Are my files uploaded to a server?
No. Every tool runs entirely inside your browser using JavaScript and WebAssembly, so your files never leave your device. Nothing is uploaded, stored, or sent anywhere.
How much smaller will my PDF get?
It depends on the file. Image-heavy and scanned PDFs shrink the most; text-only PDFs are already compact. The tool always shows the before-and-after size so you can decide.
Will compressing reduce quality?
Lower quality settings save more space but soften images slightly. Choose a higher setting to keep pages sharp, or a lower one when small size matters most.
Will the output ever be larger than the original?
No. If a setting cannot beat the original size, the tool keeps your original file rather than handing back a bigger one.