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Compress PDF

Compress PDF files without uploading. Reduce file size by re-encoding pages — free, private, in your browser.

Compress a PDF privately in your browser

Shrink large PDFs for email limits or uploads without sending the file to a server. Choose quality and DPI, then download a smaller copy — processing stays on your device.

What you can do with it

Fit a PDF under an email attachment limit
Reduce a scan or export so it sends cleanly without an external cloud compressor.
Prepare files for upload portals
Many forms cap upload size — compress first, then submit the smaller PDF.

How to compress a PDF

  1. Open your PDF — it loads locally with no upload.
  2. Set quality and DPI (lower values shrink more).
  3. Download the compressed PDF.

Frequently asked questions

Is my PDF uploaded when I compress it?
No. Compression runs entirely in your browser. Your file never leaves your device.
How does compression work?
Each page is re-rendered as a JPEG at your chosen quality and DPI, then rebuilt into a new PDF. Lower quality and DPI produce smaller files.
Will text stay selectable?
No. Compressed pages become images, so text is no longer selectable or searchable. Use this when file size matters more than editability.
Does compressing modify my original file?
No. A new smaller PDF is created when you download. Your original stays unchanged on disk.