About Private Online Tools
A file workbench that does its work in your browser tab, so your documents never reach anyone else's computer.
The problem this exists for
Almost every free file tool online works the same way. You hand over the document, a server you know nothing about does the work, and you get the result back. In between, your file sat on someone else's computer. For a holiday snap that is fine. For a payslip, a contract, a medical letter or a scan of your passport, it is a strange thing to have agreed to.
The usual reassurance is a sentence promising the file is deleted after an hour. That promise is only necessary because the file was theirs to hold in the first place.
What this does instead
Every tool here runs inside your browser tab. Your file is read into memory on your own computer, edited there, and written back out as a download. It is never transmitted, because there is nowhere for it to be transmitted to: this site has no server that accepts files, and no account system that would need one.
That is not a policy decision that could be reversed in a later update. It is how the software is built.
How you can check
A privacy claim you cannot verify is just marketing, so the site is built to be checked rather than trusted:
- The libraries are served from here. The PDF and compression code and the typeface come from this domain rather than from a CDN, so using a tool does not announce you to anyone.
- A Content-Security-Policy that enforces it. The browser is told which hosts this page may talk to, and the list is analytics and nothing else. An upload to anywhere would be blocked by the browser and reported in the console, even if some future change tried it by mistake.
- Watch it yourself. Open your browser's developer tools, go to the Network tab, and edit a file. You will see the analytics ping and nothing else — no request carries your document, because no request contains it. Better still, turn your Wi-Fi off: every tool keeps working.
What it costs
Nothing, and there is no account to make. Since the work happens on your computer rather than on rented servers, running the site costs about the same whether ten people use it or ten thousand.
Who makes it
Private Online Tools is built and maintained by Javier Cristobal. If something is broken, wrong, or missing, tell me about it — it is a small project and that feedback is how it gets better.
Last updated 17 September 2026.