turnformatCompress PDF online: reduce file size for free
Make your PDFs smaller to email them or upload them anywhere.
Drop your files here
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Choose filesAccepts PDF · Up to 50 MB per file and 20 files at once
Compress PDF: step by step
Upload your files or drag them onto the upload area. You can process several at once.
Choose the compression level (recommended works almost always) and press “Compress”.
Download the result. Your files are deleted automatically after 60 minutes.
Compress PDF: what it's for
Most of a PDF's size is usually in its images: photos, scans and graphics at a higher resolution than needed. Compressing scales those images down, removes unused data and trims fonts to the characters actually used. Text stays sharp and selectable.
Frequently asked questions
How much smaller will my PDF get?
It depends on the content. PDFs with photos or scans often shrink to half or less; a text-only PDF barely changes. If it can't be reduced, you get the original back, never a bigger file.
Which compression level should I choose?
Recommended keeps images at 144 dpi, which look good on screen. Low (200 dpi) is better for printing, and high (96 dpi) gives the smallest file for attaching or uploading.
Is it safe to upload my files?
Your files are only used for the conversion and are deleted automatically after 60 minutes. They're never shared with anyone.
Does it work on mobile, Mac and Windows?
Yes. It works in any modern browser, on desktop and mobile, with nothing to install.