Compress PDF
Shrink PDF file size right on your machine. Most effective for scanned / image PDFs.
Everything happens on your machine — no file is uploaded to any server
Compressing a PDF reduces its file size so it's easier to email, submit to a government online portal, or attach when there's a size limit — it works best on scanned PDFs or PDFs full of images.
You choose whether to prioritize quality, balance, or smaller size, preview how much is saved, then download the lighter file. All compression happens right in your browser on your device — your files are never uploaded to a server, it's free to use, and no software install is needed.
How to compress and reduce PDF file size
- 1Select a PDF
Upload the PDF you want to shrink (works best on scanned or image-heavy PDFs).
- 2Choose a compression level
Pick prioritize quality, balanced, or prioritize smaller size.
- 3Compress & download
Click Compress PDF, then download the lighter file to your device.
Frequently asked questions
Does compressing a PDF reduce quality?
There's a slight reduction depending on the compression level you choose. The tool flattens each page into an image, so it's a great fit for scanned PDFs; you can select the prioritize-quality level.
Is my PDF file uploaded to a server?
Everything runs right in your browser — your files are never uploaded to any server, keeping them completely private.
Why didn't my file get smaller after compression?
If a PDF is mostly text or vectors, image compression won't reduce its size — in that case the tool recommends keeping the original.