Free PDF Compressor
Optimize a PDF's internal structure in your browser. Reduction varies by file and a smaller result is not guaranteed.
Drop your PDF here or click to upload
Supports PDF files up to 50MB
How to Compress PDF Online
- Click the upload area and select your PDF file
- Click Compress PDF
- Your compressed PDF downloads automatically
- Check the file size reduction in the result panel
Why Compress PDF Files?
Large PDF files can be difficult to share or upload. This tool rewrites a PDF with object streams, which can remove some structural overhead without changing the visible pages.
It does not recompress embedded photographs, so image-heavy or already optimized files may not become smaller. The tool reports when it cannot produce a smaller result; it does not promise a specific target such as 1 MB.
Compress PDF for WhatsApp
A smaller file can be faster to share, but platform limits can change. Check the current limit in the service you plan to use and confirm the optimized document remains readable.
Compress PDF for Email
If an attachment is too large, try this optimizer and compare the result. If it is still too large, use your provider's file-sharing option or a dedicated image-recompression tool. Always retain the original document.
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Frequently Asked Questions
How to compress a PDF file online free?
Upload your PDF, click Compress PDF, and your compressed file downloads automatically.
Is PDF compression free?
Yes, completely free. No login, no account, no hidden charges.
How much can I reduce PDF file size?
Reduction varies and may be small or zero. This tool does not recompress embedded images and cannot guarantee a target size.
Are my PDF files safe?
Yes. All processing happens in your browser. PDFs are never uploaded to any server.
Why should I compress PDF files?
Compressed PDFs are easier to share via WhatsApp, email and upload to government portals and job applications.