PDF Compressor

Re-encode image-heavy PDF pages to shrink file size. Choose low, medium or high compression. Text-only PDFs may not shrink much.

Designed to process supported files locally in your browser.

How to use PDF Compressor

  1. Upload a PDF.
  2. Choose compression level.
  3. Compress and compare sizes.
  4. Download only if the result is smaller.

How it works

Pages are rendered and re-encoded as JPEG at a chosen quality, then rebuilt into a new PDF with pdf-lib.

Privacy

Your files are processed in your browser and are not uploaded to ToolBoxy servers.

PDF Compressor FAQ

Will every PDF get smaller?

No. Already-optimized or text-only PDFs may not shrink. The tool only offers download when the output is smaller.

Are PDFs uploaded?

No. Compression runs in your browser.

Does quality drop?

Higher compression can reduce visual quality on image-heavy pages.