Reduce File Size Up to 90%
Powerful compression algorithm reduces PDF file size significantly while maintaining document quality. Choose from low, medium, or high compression levels based on your needs.
Free PDF Compressor - Reduce PDF File Size Online
Compress PDF files online free. Reduce PDF size without losing quality. Best free PDF compressor - shrink large PDF documents instantly.
PDF Compressor Features
Secure Browser-Based
All compression happens locally in your browser. Your PDF files never leave your device, ensuring complete privacy and security for sensitive documents.
Fast & Unlimited
Compress unlimited PDF files with no daily limits, file size restrictions, or watermarks. Instant processing without waiting in queues or creating accounts.
How to Compress PDF Files Online
Use our free PDF compressor to reduce PDF file size in three easy steps without losing quality.
1
Upload Your PDF File
Click the upload area or drag and drop your PDF document. Works with all PDF files up to 100MB. Your file is processed entirely in your browser for maximum security.
2
Choose Compression Level
Select low (best quality), medium (recommended balance), or high (smallest size) compression. The tool will optimize your PDF while preserving readability.
3
Download Compressed PDF
Click "Compress PDF" and download your optimized file. See exactly how much space you saved with our instant size comparison.
Why Compress PDF Files?
Discover the most common reasons people need to reduce PDF file size and how our compressor helps.
Email Large Documents
Compress PDFs to fit within email attachment size limits (usually 10-25MB). Send contracts, reports, and presentations without exceeding email server restrictions.
Save Cloud Storage Space
Reduce storage costs by compressing PDFs before uploading to Google Drive, Dropbox, OneDrive, or iCloud. Free up space for more important files.
Faster Website Loading
Optimize PDF downloads on websites and blogs. Compressed PDFs load faster, improving user experience and reducing bandwidth costs.
Archive More Documents
Store more PDF files on your device or backup drives. Compress old documents, scanned files, and archives to maximize available disk space.
PDF Compressor FAQ
Compression results vary based on PDF content. PDFs with many images can be reduced by 50-90%, while text-only PDFs may only compress by 10-30%. Our tool shows exact size reduction after compression.
Our compression algorithm is designed to minimize quality loss. Low and medium compression levels maintain excellent quality. High compression may slightly reduce image quality but keeps text perfectly readable.
You can compress PDF files up to 100MB. For larger files, consider splitting them first or using the high compression setting for maximum size reduction.
Unlike online services that upload your files to servers, our compressor works entirely in your browser. This means faster processing, complete privacy, and no file size limits from server restrictions.
No, encrypted or password-protected PDFs cannot be compressed. You must remove the password first, compress the file, then re-encrypt it if needed.
No! Compression only reduces file size by optimizing internal PDF structure and reducing image quality. All pages, text, and content remain intact.
Use low for important documents where quality matters most. Medium (recommended) balances size and quality for most uses. High compression for files where small size is more important than perfect quality.
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