How much can PDF compression reduce my file size?

Results vary by content. A PDF with many high-resolution images can shrink by 50–80%. A text-heavy PDF may reduce by 10–30%.

Which compression level should I choose?

Use Maximum for email attachments and web sharing. Balanced is great for most everyday use. High Quality keeps near-original sharpness for printing.

Can I compress a password-protected PDF?

No. Remove the password first using your PDF reader, then upload here for compression.

Is PDF compression free?

Yes, completely free. No account, no watermarks, no cost.

What file formats are supported for upload?

Only PDF files are accepted for compression. Files up to 150 MB are supported.

All PDF Tools

Compress PDF

Compress PDF — Reduce File Size Online, Free

Shrink any PDF without losing important quality. Choose your compression level, upload your file, and download a smaller PDF in seconds — no sign-up needed.

No sign-up required 3 compression levels Processed securely — not stored permanently Works on Mac & PC

Compression Level

Maximum Smallest file — web / screen viewing (72 dpi)

Balanced Good balance of size and quality (150 dpi) — recommended

High Near-original quality for printing (300 dpi)

How to Compress a PDF Online

Choose a Compression Level

Select Maximum for the smallest file, Balanced for everyday sharing, or High Quality for printing.

Upload Your PDF

Drag & drop or click to select your PDF. Files up to 150 MB are supported.

Download

Hit "Compress PDF" and download your smaller PDF file instantly.

Compression Level Guide

SCREEN

Maximum

Smallest possible file. Designed for web viewing and email. Images are resampled to 72 dpi. Best when file size matters most.

EBOOK

Balanced

The sweet spot. Resamples images to 150 dpi while keeping the file noticeably smaller. Ideal for most everyday documents and reports.

PRINTER

High

Near-original quality. Images are kept at 300 dpi for sharp, professional printing. Moderate size reduction.

Frequently Asked Questions

Results depend heavily on content. A PDF packed with high-resolution images can shrink by 50–80%. A text-only PDF may reduce by 10–30%.

Use Maximum for email and web sharing where file size is critical. Balanced works great for most everyday documents and reports. High Quality is best when you need sharp output for printing.

Text and vector graphics remain perfectly sharp at all compression levels — only embedded raster images are resampled.

No. Remove the password protection first using your PDF reader or another tool, then upload here for compression.

Yes, completely free. No account, no watermarks, and no per-page fees.

Only PDF files (.pdf) are accepted. Files up to 150 MB are supported.

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