How to Compress a PDF

Select your PDF: Drag and drop or click to browse for your file.
Choose compression level: Select between light, medium, or strong compression.
Download: Your compressed PDF is generated instantly and ready to download.

🔒 No file uploads. Compression runs entirely in your browser. Your PDF stays on your device.

Why Compress PDFs with ClientPDF?

100% private: Your file is never uploaded — compression happens locally
Adjustable quality: Choose how much to compress based on your needs
No limits: Compress as many files as you want, unlimited times
No account: No registration required
Fast: No upload/download time — instant local processing

When to Compress a PDF

Email attachment size limits (most email providers cap at 25MB)
Uploading to forms or portals with file size restrictions
Reducing storage usage for archived documents
Faster sharing and downloading of large reports
Optimizing PDFs with embedded images for web viewing

Frequently Asked Questions

Does compression reduce quality?

Light compression preserves near-original quality. Stronger compression reduces image quality to achieve smaller file sizes. Text and vector graphics remain sharp at any level.

Is my file uploaded to a server?

No. ClientPDF compresses your PDF entirely in your browser. Your file never leaves your device.

What's the maximum file size?

There's no hard limit — but very large files (100MB+) may be slow depending on your device. For best results, we recommend files under 50MB.

Compress PDF Online