How to Reduce PDF File Size Online
PDFs usually get large because of high-resolution images or scanned pages. If a file is too big to email or upload, here are practical, free ways to make it smaller — all in your browser.
Remove pages you do not need
Often a PDF is bigger than necessary because it includes extra pages. Use the split tool to keep only the pages you need, which can cut the size sharply.
Keep only the pages you need:
Open the Split PDF toolCompress images before building the PDF
If you create PDFs from photos or scans, the images are the main weight. Compress each image first, then add it to your document — the resulting PDF will be far smaller.
Shrink images first:
Open the Image CompressorOther quick wins
- When scanning, choose a lower DPI (200–300 is plenty for text).
- Scan in grayscale instead of colour where colour is not needed.
- Split a very large PDF into smaller parts so each is easier to share.