Compress PDF Files Online for Free
Reduce PDF file size by up to 80% without losing quality. SprinkleTools' free online PDF compressor makes large files easy to email, upload, or share — all processed securely in your browser.
Perfect for shrinking reports, presentations, and scanned documents for work, school, or everyday sharing.
Drop your file here, or browse
PDF files · Max 10 MB free
Private & Secure
Files encrypted in transit and automatically deleted after your session ends.
Lightning Fast
Cloud-powered processing means most files are ready in under 10 seconds.
100% Free
Free for files up to 10MB. No hidden fees, no watermarks on output.
Security & Compliance
SSL/TLS Encrypted
Encrypted in transit
Auto-Deleted
Files removed after session
Processed Securely
Secure cloud infrastructure
No Tracking
No ads, no data selling
How to Compress PDF
Upload your PDF files
Click the upload area or drag and drop your file. Multiple file formats are supported.
Choose your settings
Our system processes your file securely. Most conversions complete within seconds.
Download your PDF file
Your processed file is ready instantly. Click download and your file will be saved to your device.
Why use Compress PDF?
- Shrink large PDFs to meet email attachment size limits
- Reduce file sizes for faster web uploads
- Compress scanned documents that are unnecessarily large
- Prepare files for cloud storage with limited space
- Optimize PDF portfolios for sharing
When should you use this?
- Emailing a PDF that exceeds the attachment size limit
- Uploading documents to a portal with file size restrictions
- Archiving large volumes of scanned documents
- Sharing files on slow connections or mobile devices
- Reducing storage costs for document archives
Is it secure?
Files Deleted After Session
Your files are automatically deleted when your session ends. We do not store, read, or share your documents.
Encrypted in Transit
All file transfers are protected with SSL/TLS encryption, ensuring your data is secure during upload and download.
Processed Securely
Files are processed on secure cloud infrastructure. No human ever accesses your documents during processing.
No Ads or Tracking
We don't serve ads, track your activity, or sell your data to third parties. Your privacy comes first.
Frequently Asked Questions
How much can I reduce a PDF file size?
Typically 20–80% depending on content. Image-heavy PDFs compress the most, while text-only PDFs compress less.
Will compression affect the quality of my PDF?
Our smart compression minimizes quality loss. Text and vector graphics are not affected. Images may see a slight reduction at maximum compression.
How long are files kept on the server?
Files are automatically deleted at the end of your session. We never store your documents long-term.
Popular Use Cases
How to Compress PDFs for Sharing on Slack or Microsoft Teams
Slack's free plan limits workspace file storage, and Microsoft Teams has per-file upload limits. Sharing large PDF reports, slide decks, or design documents slows down channels — files take forever to upload, colleagues wait to download, and your workspace storage fills up fast.
Learn howHow to Compress Scanned Documents to Save Cloud Storage
Scanned documents are notoriously large — a single page can be 5-10MB. Storing hundreds of scanned PDFs of contracts, invoices, and records eats through your Google Drive, Dropbox, or OneDrive storage quickly. At this rate, you'll hit your storage limit in months and face either deleting files or paying for more storage.
Learn howHow to Compress PDF for Uploading to Government Portals
Government websites like USCIS, IRS, and state agencies often have strict file size limits (2-5MB). Your tax forms, applications, or supporting documents exceed the upload limit.
Learn howRelated tools
Need larger files or batch processing?
Upgrade to Pro for 100MB files, batch processing, and priority speed — starting at $9/month.