Compress PDF free online
Shrink your PDFs so they fit in emails and upload faster. Everything runs in your browser → your file is never uploaded to a server.
Compression happens in your browser — private and watermark-free. To reduce size, each page is rasterised (turned into an image), so the text is no longer selectable. Ideal for scans and image-heavy PDFs.
How it works
- Upload or drag your PDF.
- Choose the compression level.
- Download the lighter PDF.
Reduce the size of your PDFs without installing anything
A PDF that is too large won't fit in many forms and won't email well. Compressing a PDF reduces its size so you can attach, upload or share it without problems. With this tool you do it for free and in your own browser: the file is not uploaded anywhere, so it is private and safe for confidential documents.
It works especially well with scanned or image-heavy PDFs, which are the ones that weigh most: the reduction is often 50%–80%. Pick “High quality” if you want the loss to be barely noticeable, or “Maximum compression” when you just need the smallest possible file.
Frequently asked questions
How do I compress a PDF for free?
Upload your PDF, choose the compression level and click «Compress PDF». In seconds you download a lighter file — free, no watermark, no sign-up.
Is my PDF uploaded to a server?
No. Compression runs entirely in your browser; the file never leaves your device.
How much smaller does it get?
It depends on the content: image-heavy or scanned PDFs shrink a lot (50-80%); an already-optimised or text-only one may shrink little.
Does it reduce quality?
It lowers image resolution in a controlled way per level. With «High quality» it is barely noticeable; «Maximum compression» is much lighter at the cost of some sharpness.
Will the text stay selectable?
No: each page becomes an image, so the text is no longer selectable. If you need to keep it, don't compress.