Compress PDF Online — Reduce File Size Privately
Reduce PDF file size without losing quality using client-side stream optimization.
Select Compression Level
Compressing your PDF...
Optimizing document object streams in your browser...
PDF Compressed!
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Open directly in another tool without downloading or re-uploading:
How to Use Compress PDF
Select your PDF
Choose the PDF document you want to optimize from your computer or phone.
Pick compression preset
Choose between Low (maximum visual quality), Medium (recommended balance), or High (smallest file size).
Compress & Download
Click Compress PDF to optimize streams and download the smaller file with a full size reduction report.
Reduce PDF file size while keeping text sharp
Large PDFs are hard to email and slow to open. PDFora Compress PDF optimizes the internal structure of your file and offers Low, Medium and High presets so you can trade size against quality.
Compression runs in your browser, so sensitive files never leave your computer. You see the original size, the new size and the percentage saved before you download.
Common uses for Compress PDF
- Fit a PDF under an email attachment limit
- Meet the file size cap on a government or job portal
- Speed up sharing of scanned documents on mobile
- Save storage space for archived paperwork
Frequently Asked Questions about Compress PDF
How does client-side PDF compression work?
PDFora optimizes internal object streams, strips redundant embedded metadata, and compresses binary streams locally in your browser.
Will my document quality be preserved?
Yes! Medium compression preserves crystal clear text and crisp vector graphics while optimizing file structure.