Compress PDF

Reduce PDF file size using object stream compression.

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Drop a PDF to compress

Max 50MB per file · 50MB total

Reduce the size of large PDF files so they fit email attachments and upload limits. Compression runs in your browser using object stream optimization, so your document is never uploaded anywhere.

How to use it

  1. Add the PDF file you want to shrink.
  2. Start the compression process.
  3. Compare the original and compressed sizes when the tool finishes.
  4. Download the smaller PDF and share it as needed.

Key features

  • Reduces PDF file size directly in the browser
  • Keeps text selectable and pages intact
  • No uploads, which suits confidential documents
  • Shows the result so you can verify the savings

Frequently asked questions

How much smaller will my PDF get?

It depends on the file. PDFs with many embedded objects and redundant structure shrink the most, while already-optimized files may see smaller savings.

Will compression lower the quality of images inside the PDF?

This tool optimizes the file structure rather than re-encoding images, so the visual quality of pages stays the same.

Why is my file still too big after compressing?

If your PDF is mostly high-resolution scans, try the Images to PDF pipeline or reduce scan resolution at the source before compressing.