Compress PDF Online
Shrink bloated PDF files to a fraction of their size without visible quality loss. Perfect for email attachments, uploads, and saving storage. All compression runs locally in your browser.
Compress PDF NowNo software required · Works in any browser
Up to 90% Smaller
Dramatically reduce file size by compressing embedded images while keeping text and vector graphics crisp.
Private Compression
Your documents stay on your device. No files are uploaded to any server during compression.
Fast Processing
Compression takes seconds, even for large documents. No waiting in server queues.
Quality Control
Choose between maximum compression or best quality. Preview the result before downloading.
How It Works
Add Your PDF
Drag and drop your PDF file or click to browse. Works with any PDF — scanned documents, reports, forms, or presentations.
Choose Compression Level
Select how much to compress. Higher compression means smaller files; lower compression preserves more image detail.
Download Compressed PDF
Preview the result and download your smaller PDF. The original file is untouched — you always keep the original.
Common Use Cases
Email Attachments Under 10MB
Most email providers cap attachments at 10-25MB. Compress large PDFs so they fit within email limits without using file-sharing links.
Faster Website Uploads
Uploading PDFs to web portals, CMS platforms, or government forms is much faster with smaller files and avoids upload timeouts.
Saving Cloud Storage Space
Compress archived PDFs before storing them in Google Drive, Dropbox, or OneDrive to save space and reduce storage costs.
Mobile-Friendly Documents
Smaller PDFs load faster on phones and tablets, improving the reading experience for recipients on mobile connections.
Superconverter vs Others
| Feature | Superconverter | Others |
|---|---|---|
| Document uploaded to server | Never | Always |
| Compression quality options | Multiple levels | One preset |
| File size limit | No limit | 50-100MB |
| Text quality preserved | Always | Varies |
| Account required | No | Usually |
Frequently Asked Questions
How much smaller will my PDF get?
It depends on the content. PDFs with many high-resolution images can shrink by 70-90%. Text-heavy PDFs with few images may only shrink by 10-20% since text is already compact. The tool shows you the exact reduction before you download.
Will compression affect text readability?
No. Text and vector graphics in PDFs are stored as mathematical descriptions, not pixels. They pass through compression unchanged. Only embedded raster images (photos, scans) are compressed.
Can I compress a scanned PDF?
Yes, and scanned PDFs often benefit the most from compression since every page is essentially a large image. You can achieve significant size reductions while keeping pages readable.
Is the compressed PDF still searchable?
If your original PDF has searchable text (not a flat scan), the compressed version retains full text searchability. Compression only affects embedded images, not the text layer.
Can I compress password-protected PDFs?
You'll need to unlock the PDF first. Use our PDF Unlock tool to remove restrictions, then compress the file. PDFs with an open password need the password entered before processing.