About Compress PDF
Compress PDF is a free, private PDF tool that runs entirely in your web browser. Shrink a PDF's file size with a strong recompress mode for big savings, or a lossless re-save that keeps text selectable. Because everything happens locally on your device, your files and data are never uploaded to a server. No sign-up or installation required. It keeps working offline too. It is handy for reducing PDF size for email, uploads, and storage. Like every free online tool by Digital Heroes, Compress PDF is 100% free with no limits.
Frequently asked questions
Is Compress PDF free?
Yes. Compress PDF is completely free for everyone. No sign-up, no account, and no usage limits.
Is it private? Are my files uploaded anywhere?
No. Compress PDF runs entirely in your browser on your own device, so your data never leaves your computer and nothing is uploaded to a server.
Does it work offline?
Yes. This tool is a Progressive Web App. Once the page has loaded it keeps working offline, and you can install it as an app from your browser.
Do I need to install anything or create an account?
No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.
What is the difference between recompress and optimize?
Recompress rasterizes each page to a JPEG image and rebuilds the PDF. This gives the biggest savings but text is no longer selectable. Optimize losslessly re-saves the file structure, giving modest savings while keeping text and vectors intact.