Compress PDF
Reduce PDF file size while maintaining quality. Fast, free, and private — runs in your browser.
Drop your PDF files here
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PDF · Max 50MB per file · Multiple files supported
Compression Options
Output Format
Compressing...
Upload a file to start compression
Three Steps
Drop your PDF
Drag and drop or click to select your PDF files.
Optimize instantly
Your PDF is optimized in-browser. No server uploads.
Download compressed
Get your optimized PDF file instantly.
Why Compress PDFs?
Large PDF files are difficult to share via email, slow to upload, and waste storage space. Compressing PDFs is essential for efficient document management and sharing.
Benefits of PDF Compression
- Faster email delivery — smaller files attach and send quicker
- Lower storage costs — less space needed for document archives
- Quicker uploads — faster submission to portals and forms
- Better web performance — faster loading for embedded PDFs
- Mobile friendly — easier to view and share on phones
Frequently Asked Questions
How does PDF compression work?
PDF compression reduces file size by removing duplicate objects, compressing streams, and optimizing the document structure. Our compressor uses pdf-lib to create optimized PDFs while preserving content quality.
Will compression reduce PDF quality?
Our compressor focuses on structural optimization rather than content degradation. Text remains crisp and images maintain their visual quality. The file size reduction comes from removing redundant data and optimizing encoding.
What PDF features are preserved?
Text, images, fonts, and document structure are preserved. Some metadata may be removed to reduce file size, but the core content remains intact.
Is there a file size limit?
Each PDF can be up to 50MB. There's no limit on the number of PDFs you can compress in one session.
Are my PDFs uploaded to a server?
No. All compression happens directly in your browser using pdf-lib. Your PDFs never leave your device — not even temporarily.