🔒 No server uploads · No watermark

Edit a PDF free

DukPdf's Edit PDF tool lets you add text, highlights, drawings, sticky notes, and other annotations to a PDF in your browser. Free, with no server uploads and no watermark. The file never leaves your device.

Open Edit PDF →

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A common scenario

You need to add a few comments and callouts to a PDF before sending it back to a colleague, and you do not have Adobe Acrobat.

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Why privacy matters here

Cloud PDF editors upload the file. DukPdf runs editing locally in your browser, so the document never leaves your device. See how local processing works.

✓ No watermark✓ Works offline✓ Open DevTools to verify

How to edit a pdf free

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.

Edit a PDF free — questions

Can I add text to a PDF?

Yes. Pick the text tool, click anywhere on the page, and type. You can change the font size, color, and weight. The text is embedded in the PDF, not flattened to an image.

Can I highlight, underline, or strike through?

Yes. The annotate tools support highlight, underline, strike-through, and free-form drawing. Shapes and sticky notes are also available.

Will the original PDF be modified?

The original file is never modified. The edited version is saved as a new PDF, so you can keep the original intact for reference.

Is the PDF uploaded?

No. Editing runs in your browser. Open DevTools → Network tab and you will see zero upload requests while editing.

🔒 DukPdf — YOUR FILES NEVER LEAVE YOUR DEVICE

Ready to edit a pdf free? Your files stay yours.

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