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Compress PDF Online — Reduce File Size Privately

Reduce PDF file size without losing quality using client-side stream optimization.

Drop PDF here to compress

or click to choose file from your device

Stream-level optimization performed 100% in your browser.

How to Use Compress PDF

Choose the PDF document you want to optimize from your computer or phone.

Choose between Low (maximum visual quality), Medium (recommended balance), or High (smallest file size).

Click Compress PDF to optimize streams and download the smaller file with a full size reduction report.

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.