How to Compress a PDF Online — Free
Simply drag your PDF file onto the upload area above (or click to browse), choose your compression level, and click Compress PDF. Your compressed file downloads instantly. No account needed, no email required.
Which Compression Level Should I Choose?
| Level | Reduction | Best For |
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| Low | 10–20% | Archiving, printing, where quality is critical |
| Medium | 30–50% | Email attachments, general sharing (recommended) |
| High | 50–75% | Web uploads, when small size matters most |
🔒 Privacy: Your PDF is processed entirely in your browser using JavaScript. It is never uploaded to any server. This makes our compressor safe for confidential documents like contracts, medical records and financial statements.
Frequently Asked Questions
How do I compress a PDF below 1MB?
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Use our High compression setting. Most PDFs can be reduced to under 1MB. If the PDF contains many high-resolution scanned images, it may remain above 1MB even with maximum compression.
Will compressing reduce the quality of my PDF?
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At Low and Medium settings, the quality reduction is barely noticeable for most documents. High compression may slightly reduce image sharpness. Text remains fully readable at all settings.
Is there a file size limit?
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Our tool handles PDFs up to 50MB. For larger files, we recommend splitting the PDF first, then compressing each section separately.
Can I compress a password-protected PDF?
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No. Password-protected PDFs cannot be processed without first removing the password protection. Use Adobe Acrobat to remove the password, then compress here.