Compress PDF
Reduce PDF file size while maintaining quality
File
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Original size
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Compressed
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Upload a PDF file
Drop a PDF here or click to browse
Compression Settings
Tips
Text in the PDF becomes images after compression.
Use 'Balanced' for most documents.
Custom mode gives you full control over quality.
Suggested Next Steps
Related Tools
How to Use
Upload Your File
Drag and drop your file or click to browse. Your file stays in your browser.
Adjust Settings
Configure options to get exactly the result you need.
Download Result
Process and download your file instantly — no waiting, no server upload.
Why Use This Tool
100% Free
No hidden costs, no premium tiers — every feature is free.
No Installation
Runs entirely in your browser. No software to download or install.
Private & Secure
Your data never leaves your device. Nothing is uploaded to any server.
Works on Mobile
Fully responsive — use on your phone, tablet, or desktop.
Your Files Stay Private
This tool processes your files entirely in your browser. Nothing is uploaded to any server — your data never leaves your device.
- No server upload — 100% client-side processing
- No data stored — files are discarded when you close the tab
- No account required — use instantly without signing up
How to Compress PDFs: Reduce File Size Without Losing Quality
Key Points
- Image-heavy PDFs benefit most from compression—text-only files are already small
- Compression reduces embedded image resolution and optimizes internal structure
- Browser-based compression means your documents never leave your device
Large PDF files are difficult to email, slow to upload, and consume storage space. PDF compression reduces file size by optimizing images and internal data structures. This is especially effective for scanned documents and image-heavy presentations, often reducing size by 50-80% with minimal visible quality loss.
50-80%
Typical file size reduction
Common Use Cases
Email Attachments
Most email services limit attachments to 25 MB. Compress oversized PDFs to fit within limits without needing cloud storage links.
Website & Portal Uploads
Government forms, university applications, and job portals often have strict file size limits. Compression helps meet these requirements.
Cloud Storage Optimization
Reduce storage costs by compressing archived documents. A 10 MB report compressed to 3 MB saves significant space across hundreds of files.
Faster Document Sharing
Compressed PDFs load and download faster, improving the experience for recipients on slower connections or mobile devices.
Compression Tips
Start with medium compression and check quality—you can always compress more if the result looks acceptable.
Scanned documents (image-based PDFs) compress much more than text-based PDFs.
If quality matters, keep the original file and use the compressed version only for sharing.
For presentations with high-res photos, compression can reduce file size dramatically with barely noticeable quality difference at screen resolution.
PDF compression is performed locally in your browser. No files are uploaded to any server. Compression is lossy for images—keep original files for archival purposes.