Compress PDF
Reduce PDF file size online while keeping the document usable.
Drop a PDF here or click to upload
A single PDF file
How to use
- 1Upload a PDF file.
- 2Choose Basic (safe, keeps text selectable) or Strong (rasterized, smaller file).
- 3Click Compress PDF.
- 4Compare the before and after size, then download.
Features
- Two compression modes to match your needs
- Before/after size comparison
- Runs entirely in your browser
Supported formats
Privacy
Your PDF is compressed in your browser and is not uploaded to our server.
About this tool
Compress PDF reduces file size either by rebuilding the PDF's internal structure (Basic, lossless) or by converting each page into a compressed image (Strong, best for scanned or image-heavy documents). Compression results vary widely depending on what the original PDF contains — not every PDF can be compressed dramatically.
Frequently asked questions
How much smaller will my PDF get?
It depends entirely on the PDF. Documents with large images can shrink significantly with Strong mode; text-only PDFs that are already optimized may barely change.
What is the difference between Basic and Strong compression?
Basic rebuilds the file structure without changing quality, keeping text selectable. Strong converts each page to a compressed image, which reduces size further but removes selectable text.
Is my PDF uploaded to a server?
No, compression happens entirely in your browser.
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