PDF Compressor
Drop a PDF. We slap it down to size — privately in your browser. See the savings live.
- 100% free
- No sign-up
- No limits
- Instant results
What is PDF Compressor?
PDF Compressor is a free online tool that shrinks PDF file sizes by re-rendering pages at optimized quality and stripping unnecessary metadata.
Unlike cloud-based compressors that upload your documents, everything runs directly in your browser — your files never touch a server. Choose from three quality presets or fine-tune with custom settings. Perfect for email attachments, uploading to portals, and saving storage space.
How to use PDF Compressor
- 1
Upload your PDF
Click the upload area or drag and drop a PDF file. The tool accepts any PDF up to your device memory limit.
- 2
Choose quality
Select High (best quality, ~30-50% smaller), Medium (balanced, ~50-70% smaller), Low (smallest, ~70-85% smaller), or Custom for full control.
- 3
Optional: strip metadata
Check the strip metadata box to remove title, author, and keywords — saves a few extra KB and improves privacy.
- 4
Compress
Click Compress (or Ctrl+Enter). Watch the real-time progress bar showing page-by-page processing and size reduction.
- 5
Download
Review the before/after file size comparison, then download your compressed PDF.
Everything this tool
does for you
- Reduce PDF size by up to 85%
- Three quality presets: High, Medium, Low
- Custom resolution scale and JPEG quality sliders
- Real-time before/after size comparison
- Optional metadata stripping for extra savings
- Page-by-page progress tracking
- 100% client-side — files never uploaded
- No file size limits, no signup required
Related free tools
Frequently asked questions
This tool fixed one thing.
Now fix the whole site.
Our scanner runs 240+ checks across 10 audit areas, ranks every issue by the score points it costs, and hands you the code to paste.
Run a free audit- Reduce PDF size by up to 85%
- Three quality presets + custom
- Strip metadata for extra savings
- Live before/after comparison
- Files never leave your browser
- No signup or limits