Use an online PDF compressor
Use Adobe Acrobat’s Compress PDF tool
Use Preview on Mac to reduce file size
Print the PDF to a smaller size
Reduce image resolution before creating the PDF
Remove unnecessary pages from the PDF
Delete embedded fonts if possible
Save the PDF with optimized settings
Convert images in the PDF to grayscale
Use a lower-quality export setting
Split large PDFs into smaller files
Compress the PDF with software like Smallpdf, iLovePDF, or Foxit
Recreate the PDF from the source file with smaller images
Remove unused objects and metadata from the PDF