Use a PDF compressor tool
Reduce image resolution
Compress images before adding them to the PDF
Remove unnecessary pages
Delete unused fonts
Embed only required fonts
Remove comments and annotations
Flatten form fields and layers
Save as optimized PDF
Use “Reduce File Size” or “Optimize PDF” in PDF software
Convert images to JPEG instead of PNG when appropriate
Lower scan quality when creating scanned PDFs
Convert color images to grayscale if acceptable
Remove embedded media or attachments
Split large PDFs into smaller files
Recreate the PDF with smaller source files
Use a smaller page size if possible
Avoid high-resolution vector graphics when unnecessary