Compress a PDF online — without uploading it
Make a heavy PDF small enough for an email attachment or an upload form. You see the size of each compressed version before you download.
Compression runs entirely in your browser: not a single byte of the document is sent to a server. No watermark.
How to reduce the size of a PDF
Open the PDF and click "Compress". RoseLab prepares two versions and shows the size of each next to the original, so you can pick the one that fits your limit.
Image compression rebuilds every page as an optimized image. It gives the biggest reduction and is ideal for scanned documents and PDFs full of photos, but the text is no longer selectable. Light compression is lossless: it keeps text selectable and the original quality, with a smaller reduction. Try light first; if it is not enough, use image compression.
Compress PDFs for email and e-filing limits
Email providers usually reject attachments above 20–25 MB, and many court e-filing systems, university portals and job sites accept even less per file. Scans made at high resolution are the usual culprit. Compressing the PDF is faster than re-scanning, and it keeps the document readable on screen and on paper.
Because nothing is uploaded, you can compress signed contracts, ID scans and medical records without handing them to a third party.
Frequently asked questions
How can I make a PDF smaller to send by email?
Open it in the compressor, click "Compress" and download the version whose size fits your email limit.
Does compressing a PDF reduce quality?
Light compression keeps the original quality and selectable text. Image compression reduces the size much more; it stays readable but text can no longer be selected or searched.
Is my PDF uploaded to compress it?
No. Compression happens inside your browser and the file stays on your computer.
Is there a file size limit?
The free plan accepts files up to a size limit shown on the tool; paid plans accept larger files.