Compress PDF files
reduce size instantly
Reduce the file size of your PDF documents by removing metadata, redundant objects, and enabling stream compression — all in your browser.
Drop your PDF here, or click to browse
or click to browse — up to 100 MB
How does PDF compression work?
PDF compression refers to techniques that reduce the byte size of a PDF file without significantly affecting its visual content. There are two broad categories: lossless compression (no visual change whatsoever) and lossy compression (re-renders images at lower quality for greater size reduction).
QuickConvert's browser-based PDF compressor applies lossless optimization: it removes embedded metadata (author, keywords, creation software), redundant objects, and applies deflate stream compression to the document structure. This typically reduces file size by 5–30% depending on how the original PDF was created.
PDFs created by office software or exported from browsers often contain large amounts of embedded metadata and uncompressed streams. These files benefit most from this type of optimization. Scanned PDFs or those already optimized for web will see smaller improvements.
How to compress a PDF
- 1
Drop your PDF into the upload area or click to browse. The file never leaves your device.
- 2
Click "Compress PDF & Download". The tool optimizes the document structure and removes redundant data.
- 3
Your compressed PDF downloads automatically. The tool shows you the original size, compressed size, and percentage saved.
Why use QuickConvert?
Instant results
Compression happens in milliseconds for most PDFs. No waiting, no progress bars on small documents.
Completely private
Your PDF is processed entirely in your browser. It is never uploaded, stored, or accessible by anyone.
No visual quality loss
The lossless approach means every word, image, and graphic looks identical in the output file.
See exactly how much you saved
After compression, the tool shows original size, compressed size, and the exact percentage reduction.
Common use cases
Email attachments
Reduce PDF size to fit within the email attachment limit of 25 MB before sending.
Web uploads
Compress PDFs before uploading to websites, portals, or cloud storage to save space.
Legal & form submissions
Many online portals have strict file size limits. Compress before submitting applications or forms.
Sharing via messaging
WhatsApp, Telegram, and Slack have file size limits. Compressed PDFs transfer faster.
Frequently asked questions
Related PDF tools
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