Are online PDF tools safe?
Most of them copy your document to a server you know nothing about. Some do not. The difference is checkable in about thirty seconds.
What happens when you upload a PDF?
It is copied to a server, written to disk, processed there, and kept until something deletes it. Most services state a retention window of an hour or a day, and that window is a promise about their own systems: backups, logs and delivery caches are not usually covered by it.
For most documents that is unremarkable. For a contract, a payslip, a medical letter or anything under a confidentiality obligation, it means the file has left the boundary you were trusted to keep it inside, and no promise about deletion undoes that.
How can I tell whether a tool uploads?
Watch the network. Open your browser’s developer tools, switch to the network panel, filter to requests of type Fetch or XHR, and then run the tool on a file. An upload shows up immediately as a request carrying several megabytes; a local tool shows nothing at all.
The other check takes even less effort: turn off your connection and try again. A tool that finishes the job offline never needed a server, and a tool that stalls did.
What should a privacy policy actually say?
Where the file goes, who else can reach it, and how long it stays. A policy that names a retention window is being straightforward with you. One that talks about the security of its infrastructure without saying whether your document reaches it is answering a different question.
Free is worth reading carefully too. Processing large files on servers costs money, so a free service is paid for by something, and the honest ones say whether that is advertising, a paid tier, or the data itself.
Why does pdfhq work differently?
Every tool here runs in your browser as WebAssembly, so the file is never sent anywhere and there is no server to trust with it. That is also why the suite is free without limits: the work happens on your machine, so it costs us nothing per file.
The trade is honest. A very large document is bounded by your device’s memory rather than by a server’s, and the few conversions that need heavy desktop software are simply not offered rather than quietly uploaded.
Where to go from here
Removing the metadata strips the author names and timestamps a document carries, redaction deletes content rather than covering it, and compressing is the job most people came to an online tool for in the first place.
Redaction that actually removes text covers what to do before publishing a document, and making a PDF smaller is the job itself.