Compress PDF Online
Use PDF Magic to compress PDF files online directly in your browser. This free PDF compressor reduces document size by rendering and rebuilding pages with the selected quality.
Why compress a PDF?
Smaller PDFs are easier to upload, email, store and share. Compression is useful for reports, scans, forms, presentations and documents containing large images.
Common uses
Useful for email attachments, online forms, cloud storage, school work, scanned documents and website uploads.
How to compress a PDF
Select or drag a PDF into the upload area.
Choose the preferred compression quality.
Start compression and wait for processing.
Review the result and download the optimized PDF.
Compression quality
Lower values usually create smaller files but may reduce image sharpness. Text-only PDFs may not shrink significantly.
Important limitations
The PDF is reconstructed page by page. Interactive forms, selectable text, links, signatures and vector elements may be flattened.
Local and private processing
The file is read and processed in the browser. The page should load PDF.js and jsPDF from local files on the PDF Magic domain.
Frequently asked questions
Is the PDF uploaded to a server?
No. This version processes the document in the browser.
Will text remain selectable?
Not necessarily. The compression method may rebuild pages as images.
Why is the new PDF sometimes larger?
Some PDFs are already optimized, and rebuilding them may not reduce their size.
Can protected PDFs be compressed?
Only if the browser libraries can open the document without a password.