Privacy-First PDF Tools
How It Works
Pick a tool
25+ PDF tools in one place — open one and you’re ready.
Drop your files
They open right in your browser — and stay on your device.
Save the result
Processed locally in seconds. Download and done.
Every tool works this way — instantly, locally, in your browser.
Built for Privacy
Most PDF sites upload your document to their servers. DukPdf works the other way around.
A copy of your document sits on someone else’s infrastructure, deleted on their schedule.
Processed by your own browser, start to finish — on your machine, under your control.
We send the software to your file — not your file to our servers.
Private by design
Your files are handled right on your device, so they stay yours alone.
No account needed
Just open a tool and start — we never ask who you are, and we never see what you’re working on.
Local means fast
Because everything runs on your computer, even large files and batch jobs finish fast.
Proof, live in your browser.
Open DevTools → Network tab, then run any tool. The traffic log stays empty while your PDF gets processed — visible, real-time proof that everything happens on your device.
How local processing works →DukPdf vs. Cloud PDF Tools
| Capability | DukPdf | Cloud PDF tools |
|---|---|---|
| Where processing happens | On your device | On their servers |
| Who can see your document | Only you | You + their systems |
| Copies of your file | Stay with you | Created server-side |
| Works offline | Yes, once loaded | Requires connection |
| Getting started | Instant | Signup, usually |
Built for Confidential Work
Legal
Privileged client documents stay inside your own four walls — chain of custody intact.
Redact without uploading →Healthcare
Records are processed on your machine, so PHI stays in your hands alone.
HIPAA & online PDF tools →Finance
Statements and KYC documents are handled on the device where they already live.
Is uploading statements safe? →Take it fully offline.
Everything you see here, as a native Mac app — it works entirely offline and runs huge files and batches at native speed.
Frequently Asked Questions
Are my files really never uploaded?
Really. Your files open and get processed right on your own computer, inside your browser. They are never sent to us — and you can see that for yourself in your browser’s Network tab.
How does it work without a server?
When you open a tool, DukPdf loads everything it needs into your browser. From that point on, your computer does the work itself — just like a desktop app would — and saves the result straight to your Downloads folder.
What’s the catch — how do you make money?
DukPdf Pro. The everyday tools are free with generous limits, and Pro unlocks bigger, heavier workloads. That’s the whole business: we sell software, never your data.
Is it safe for legal, medical, or financial documents?
Yes. Your documents stay on your computer the entire time, so no outside service ever handles them — which is exactly what confidential work needs.
Does it work offline?
Yes. Once a tool has loaded, you can turn off your internet and keep working. And if you want everything offline all the time, there’s the desktop app.
Do I need an account?
You can use every tool without one. An account is only needed for Pro, so your subscription can follow you across devices.
Your documents are yours. Keep them that way.
Free to use · Starts instantly · 100% on-device
Browse all 25+ tools