About robinpdf

Hi — I'm Roberto, an independent developer in Spain. robinpdf is a one-person project. There's no company behind it, no team and no investors: just me, and one conviction I couldn't shake.

Why I built it

I needed to merge two PDFs. Every tool I found wanted me to upload them to a server I knew nothing about. Read the small print on those sites and it usually says the same thing: your file is uploaded, stored "temporarily", and deleted "within a few hours". You're asked to take that on trust.

For holiday photos, fine. For a contract, a payslip, a medical report or a scan of your ID, it isn't. You shouldn't have to hand your private documents to a stranger's server just to merge two files. So I built the version I wanted to use.

Nothing is uploaded — and you can check that yourself

Every tool on robinpdf runs inside your browser. Your files are opened, processed and saved on your own device. They are never sent anywhere: not to my servers, not to anyone else's.

Plenty of sites promise privacy. The difference here is that you don't have to believe me — you can prove it in about ten seconds:

• Turn off your Wi-Fi. Open Merge PDF, disconnect from the internet, and merge two files anyway. It still works — because nothing was ever going to be uploaded.
• Open your browser's developer tools (F12) and watch the Network tab while you process a file. Your document never appears in it.

That's the whole point of building it this way. It isn't a privacy policy asking for trust; it's an architecture that makes the promise verifiable.

To be precise about one thing: a couple of tools — OCR and password protection — download a processing engine the first time you use them, so those need a connection to get going. That's program code coming down to your browser. It is never your file going up.

What that means in practice

• No sign-up, no watermark and no daily limit.
• Large files are fast, because they aren't travelling anywhere and back.
• It works on confidential documents — the kind you aren't allowed to upload.
• It works offline once the page has loaded.

How it stays free

robinpdf is free and I intend to keep it that way. It's paid for by unobtrusive advertising. Ads are the only third-party code on the site, and they never see your documents — your files are simply never part of any network request.

If robinpdf is useful to you, sharing it is the best support there is.

Get in touch

I read every message: ideas for new tools, bugs, or a translation that reads badly in your language. Write to [email protected].

— Roberto