FreeGenDoc

Compress PDF

Compress a PDF

Make a PDF smaller by rebuilding it with object streams — deduplicating data and dropping unused objects. Runs entirely in your browser.

Your file never leaves your device — everything runs in your browser, with no upload and no signup.

How it works

  1. Add a PDF file.
  2. Click compress.
  3. The PDF is rebuilt more efficiently.
  4. Your smaller PDF downloads.

Is it really free and private?

Yes. The whole operation runs in your browser using pdf-lib — no file is uploaded to a server, there is no watermark, and there is no signup.

How much smaller will it get?

This method cleans up the PDF structure, which helps most on files with repeated or unused data. Image-heavy PDFs may only shrink a little, since the images themselves are not re-encoded.