PDF Compressor

Reduce PDF file size instantly — no uploads, no quality loss

🔒 Files never leave your browser

📄

Drop a PDF here or click to browse

Your file never leaves your browser

How to Use PDF Compressor

Upload PDF

Drag and drop or select the PDF file you want to compress.

Choose options

Toggle object streams optimization and metadata stripping for maximum compression.

Download

Download the compressed PDF and see the size reduction percentage.

Why Choose AllTools PDF Compressor?

  • ✓ 100% free, no account needed
  • ✓ Files never leave your browser
  • ✓ Object stream optimization
  • ✓ Metadata stripping option
  • ✓ Before/after size comparison
  • ✓ Compression ratio display
  • ✓ Handles large PDFs
  • ✓ Instant download

Frequently Asked Questions

How much can it reduce file size? ▼
Typically 10-50% reduction depending on the PDF content. PDFs with lots of metadata or inefficient encoding see the biggest gains.
Does compression reduce quality? ▼
No. The compression optimizes internal PDF structure without changing visible content.
Are my files uploaded? ▼
No. All compression happens in your browser. Files never leave your device.
What is metadata stripping? ▼
It removes embedded metadata like author name, creation date, and software info, which can reduce file size.
Does this work on mobile? ▼
Yes. Works on all devices with a modern browser.

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