PDF Compress Tool

Reduce PDF size in your browser without uploads or installs.

Upload a PDF

Select a PDF to compress

Max 25 MB for smooth performance.

All processing happens locally in your browser. No uploads.
No file selected
Smallest file size, best for sharing.
Balanced clarity and size for most PDFs.
Largest file with more detail preserved.
This tool rebuilds your PDF as an optimized, image-based file. Text may not stay selectable.
Pages 0
Original size 0 B
Compressed size 0 B
Download compressed PDF

Compress PDFs securely on your device

Calcwise PDF Compress reduces file size by rebuilding pages as optimized images. This keeps your documents private and speeds up sharing.

How to compress

  1. Select your PDF file.
  2. Pick a compression level.
  3. Download the smaller PDF.

When to use this

  • Sharing scans or image-heavy PDFs.
  • Sending documents through email size limits.
  • Reducing storage before archiving.
Note: Compression happens locally in your browser. No files are stored or transmitted.

Frequently Asked Questions

Are my PDFs uploaded?

No. Compression happens inside your browser only.

Why does compression change text?

The PDF is rebuilt as optimized images to reduce size. Text may no longer be selectable.

Does it work on mobile?

Yes. It is optimized for mobile, but large PDFs may process faster on desktop.