Shrink a bulky PDF right on your device — strong recompress for big savings, or a lossless re-save that keeps text selectable. No upload, ever.
Lower = smaller file, softer pages. Pages are rasterized (text becomes an image and is no longer selectable).
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, there is no sign-up or installation required, and it keeps working offline. It is handy for reducing PDF size for email, uploads and storage. Like every HeroTool by Digital Heroes, Compress PDF is 100% free with no limits.
Yes — Compress PDF is completely free for everyone. No sign-up, no account and no usage limits.
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.
Yes. HeroTools 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.
No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.
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.