Frequently asked questions
Is Preys PDF really free?
Yes. Every tool on this site is free to use, with no sign-up and no watermark added by us. The site is supported by advertising.
Are my PDF files uploaded to your server?
No. Our PDF tools run inside your browser, so your files are read and changed on your own device and are never sent to us. Tools that run this way are marked Private. If we ever add a tool that has to use our server, we will say so before you choose a file.
Do you save my documents?
No. We do not save your files unless you create an account and choose to save a document. Without an account, nothing you open here is stored.
Do I need to install anything?
No. Everything works in a modern web browser on Windows, Mac, Linux, Android and iPhone. There is nothing to download or install.
Is there a limit on file size or how many files I can use?
We do not set one. The limit is the memory of your device, because the work is done on it. Normal documents are quick on most phones and computers, and very large files with big pictures may be slow on a phone.
Can I use these tools offline?
Once a tool page has finished loading, most tools keep working if you lose your connection, because the work happens in your browser. Reload the page when you are back online.
Can a PDF with a password be opened?
Not yet. A PDF that needs a password to open cannot be read by these tools. Remove the password in the program you made it with, save a copy and try again.
Which tool should I use to make a PDF smaller?
Use Compress PDF. Light compression keeps your text, and Strong compression turns pages into pictures for the biggest saving.