Compress PDF

How to use the PDF compressor

  1. Select or drag a PDF up to 25 MB.
  2. Choose Compress PDF to rebuild the document.
  3. Check final size and download the file.

Example with a 12 MB PDF

Load a 12 MB PDF and process it.

Source PDF -> pages copied by pdf-lib -> new PDF

The interface shows size and reduction, or says no effective reduction was achieved.

Use cases

  • Test a PDF before attaching it.
  • Create a new copy of a simple PDF.
  • Check final size for email.

Notes and limitations

  • It uses pdf-lib to load the PDF, copy pages, and save a new document with default options.
  • There is one-PDF selection and a process button; no quality, resolution, or rasterization controls.
  • The limit is 25 MB. Invalid, corrupted, protected, or unsupported PDFs can fail.
  • The result can be the same size or larger. Forms, signatures, attachments, and other features may not remain identical after rebuilding.

Frequently asked questions

Is the PDF rasterized?

No. The interface copies pages into a new PDF through pdf-lib.

Can I choose quality?

There are no quality or resolution controls.

Will every PDF work?

No. Invalid, protected, or unsupported files can produce an error.