Your PDF tool is storing your files. Here's proof.

Upload a file to any random "free" PDF tool online.

Then check their privacy policy.

Most of them say something like:
"We may retain uploaded files for up to 24 hours"
or
"Files may be used to improve our services"

Your client's contract. Your salary slip. Your ID card.
Sitting on someone's server.

I got tired of this and built a tool where your files
never leave your browser. No upload happens at all.

80+ tools, nothing stored, no account needed.

Roast it, use it, or ignore it. Up to you.