🔒 No server uploads · No watermark

Offline PDF tools

DukPdf's PDF tools work offline once a page has loaded. You can merge, split, compress, edit, redact, sign, and convert PDFs on a plane, a train, or in a coffee shop with no internet — and the files still never leave your device. Free, with no account required and no watermark.

Open Merge PDF →

💡

A common scenario

You are working on a long flight and need to redact, sign, and compress a contract PDF before landing, with no WiFi.

🔒

Why privacy matters here

Offline processing is the strongest privacy guarantee: there is no network connection for the tool to upload to. DukPdf runs locally in your browser, so even when you are online, the file never leaves your device. Read more on our private PDF editor page.

✓ No watermark✓ Works offline✓ Open DevTools to verify

How to offline pdf tools

Open the tool and add your file

Click the link below to open the tool in your browser. Drop in your PDF or click to select it. The file is read locally on your device.

Configure the operation

Pick a quality preset, page range, signature style, or whatever the tool needs. Every option runs in your browser — nothing is sent to a server.

Download the result

Click the action button. The result saves to your device. The original file is unchanged unless the tool explicitly modifies it.

Every step runs in your browser. No server uploads, no waiting.

Offline PDF tools — questions

Do DukPdf's PDF tools really work offline?

Yes. Each tool loads once when you open the page, then runs entirely in your browser. Once loaded, you can disconnect from the internet and the tool keeps working — the processing never needs the network.

Do I need to install anything?

No. There is no extension, app, or plugin to install. Open a tool page in any modern browser and it works.

Which tools work offline?

All of them. Merge, split, compress, rotate, protect, unlock, redact, edit, sign, OCR, convert, repair, watermark, page numbers, and metadata — every tool runs locally in your browser.

How is this different from a desktop app?

Functionally very similar: in both cases, the file is processed on your machine. The difference is that DukPdf runs in the browser, so there is nothing to install and no platform-specific build to download.

🔒 DukPdf — YOUR FILES NEVER LEAVE YOUR DEVICE

Ready to offline pdf tools? Your files stay yours.

No server uploads. No watermark. Open the tool, drop your file, and download the result.