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How to compress a PDF
A PDF that is too large is one of the most common document headaches: it bounces back from email, won't upload to a form, or takes forever to send. Compressing the file reduces its size so it is easier to share, usually without any visible loss of quality. This guide explains why PDFs get big, how compression works and how to do it for free with easyPDF.
Why PDFs get large
Most of the weight in a PDF comes from images: scanned pages, photos and high-resolution graphics. A document made of scanned pages can easily be ten times larger than the same text typed out. Compression mainly works by re-encoding those images at a sensible resolution and quality, which can cut the file size dramatically while keeping the page perfectly readable on screen.
Steps
- Open easyPDF and choose the Compress PDF tool from the grid on the home page.
- Drag your PDF into the panel, or click Choose file to browse for it.
- If a compression level is offered, pick one: stronger compression means a smaller file, lighter compression keeps more image detail.
- Click Process and wait a moment while the file is optimised.
- Download the compressed PDF. Your original is untouched, so you can always start again.
Tips
- Match the level to the purpose. For email or web upload, stronger compression is fine. For printing, choose a lighter level to preserve image sharpness.
- Compress once. Re-compressing an already-compressed PDF gives little extra saving and can soften images. Start from the original where possible.
- Text-only documents are already small; compression helps most with scans and image-heavy files.
- If your file is above the 20 MB free limit, easyPDF PRO handles files up to 1 GB.
Is it safe?
Your file is uploaded over an encrypted connection, compressed, and then both the upload and the result are deleted automatically. We never read or keep your documents — see the Security page for details.