Compress PDF Online for Free
Compress PDF online with a free PDF compressor that keeps your files on your device.
Add your PDF
● Private · No uploadDrop your PDF here
Reduce file size while protecting readable detail
PDF · Up to 200 MB · Up to 100 pagesLarge PDFs may take longer on lower-powered computers and phones.Private local processing — your PDF never leaves your device.
Compression
If compression would make the file larger, the original PDF is returned unchanged.
How to use this PDF compressor
- 1
Choose a PDF up to 200 MB and 100 pages.
- 2
Select Balanced for a clear result or Smallest for stronger file-size reduction.
- 3
Compare the original and compressed sizes, then download your smaller PDF.
Why use this tool?
- A free PDF compressor with clear Balanced and Smallest choices.
- Balanced preserves selectable text when it can still deliver a meaningful saving.
- Reduce PDF size for files up to 200 MB without uploading them.
About PDF compression
Use this PDF size reducer to compress PDF files online while keeping readable detail. Balanced first recompresses compatible embedded images while preserving selectable text and vector graphics. If that saves less than 5%, it automatically switches to clear page compression at up to 180 DPI. Smallest uses stronger page compression at up to 120 DPI. Page compression removes text selection, links, forms and digital signatures. A PDF that is already smaller than every safe result is returned unchanged.
Frequently asked questions
How do I compress a PDF online?
Choose a PDF, select Balanced or Smallest, then start compression. The PDF compressor processes the file in your browser and provides the result for download.
Which compression level should I choose?
Balanced is the best starting point. It preserves selectable text when that produces a useful saving, then automatically tries clear page compression when needed. Use Smallest for scanned or photo-heavy PDFs when file size matters most.
Does PDF compression reduce quality?
Any strong image compression can remove detail. Balanced starts with structure-preserving optimization and only uses high-quality page compression when needed. Smallest uses stronger page compression and should be checked at full size before sharing.
Why did my PDF not become smaller?
The PDF may already be optimized, contain mostly text and vectors, or use image formats that cannot be safely recompressed in text-preserving modes. The tool keeps the original whenever a new file would be larger.
Are my PDFs uploaded to a server?
No. This free PDF compressor runs locally in your browser. Your PDF stays on your device and is not sent to ImageJiffy for processing.