Free online PDF utility
🗜️ Compress PDF Online
Try structural PDF optimization or rasterized compression for scanned PDFs, with a clear before-and-after file size comparison.
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Choose a PDF and select a compression method. Structural optimization preserves text; rasterized mode can shrink scans but flattens pages.
Rasterizing flattens pages and may remove selectable text, links, forms and accessibility information. Save your original.
How to use Compress PDF Online
Choose a PDF and select a compression method. Structural optimization preserves text; rasterized mode can shrink scans but flattens pages. Your original file remains unchanged on your device. Save the resulting download and keep a copy of your original file.
Frequently asked questions
Will compression always make my PDF smaller?
No. Already optimized or text-heavy PDFs may not shrink. We show actual output size and give you the choice.
Does image compression keep selectable text?
No. Rasterized compression turns each page into an image. Use the preserve-text method if text selection matters.