Open the PDF in a PDF editor or compressor tool
Select the compress or optimize option
Choose a compression level or output quality
Reduce image resolution if available
Remove unnecessary embedded fonts or metadata if available
Save or export the compressed PDF as a new file
Use an online PDF compressor if you do not have software
Use Adobe Acrobat, Preview, or similar built-in tools if available
Split large PDFs into smaller files if compression is not enough
Convert scanned pages to lower-resolution images before creating the PDF