Compress PDF — Free
Reduce PDF file size without losing quality. No signup required. Secure, fast, and free.
Drop your file here
or click to browse · .pdf · Max 25 MB free
How to Compress PDF
Upload your PDF
Choose compression level
Click 'Compress'
Download the smaller PDF
Frequently Asked Questions
1How do I compress a PDF for free?
Upload your PDF to ZiaSign, choose a compression level (low, medium, high), click 'Compress', and download the smaller file. Free, no signup, no watermark.
2How much can I reduce the file size?
Typically 40-90% reduction depending on image content. Text-only PDFs see smaller reductions. Image-heavy PDFs can be compressed significantly.
3Does compression affect quality?
Text remains crisp at all compression levels. Images are optimized intelligently — quality loss is minimal and only visible at extreme zoom.
4Can I compress a PDF for email?
Yes. Use the high compression setting to get your PDF under typical email attachment limits (25 MB for Gmail, 20 MB for Outlook).
5Does the PDF compressor add a watermark?
No. ZiaSign never adds watermarks to compressed PDFs. The output is clean and professional.
6Is there a file size limit for compression?
Free users: 25 MB per file. Free account: 100 MB. Pro users: up to 300 MB per file.
Why Use ZiaSign's Compress PDF Tool?
ZiaSign's free PDF compressor reduces your file size by up to 90% while preserving text clarity and image quality. Whether you need to compress a PDF for email, reduce storage space, or speed up document sharing — our online compressor handles it intelligently. Choose from three compression levels based on your needs. No watermark, no signup, works in any browser.
Also known as: reduce pdf size · make pdf smaller · pdf compressor · shrink pdf · compress pdf online free
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