How to check what's taking space in a PDF
- Add your PDF.
- Select PDF File Size Checker.
- Read the breakdown, then open Compress PDF if it will help.
About this tool
Before you compress a file, find out what's making it big. You'll see how much space goes to images, fonts, text and attachments, along with the largest pictures and the heaviest pages. That tells you whether compressing will help, or whether removing one page would do more.
Common questions
How accurate is the size of each page?
It's an estimate. Something used on several pages, such as a logo or a font, is shared out between them, because a PDF only stores it once.
What is File structure?
It's the index and other bookkeeping every PDF needs. A large share can mean the file holds old data from past edits, which Compress PDF usually clears out.
Is it free to use?
Yes. There's no sign-up, and nothing is added to your file unless you ask for it.
What happens to my files?
Your files are only used to run the tool you chose, and they're deleted automatically after about 24 hours.
Do I need to install anything?
No. It all works in your browser, on any computer or phone.