Edit a PDF online

How to Edit a PDF

1

Add your PDF

Click “Select file” or drag and drop a PDF. The document opens in the editor with all pages as a navigable canvas.

2

Add text, shapes, or images

Pick a tool from the toolbar — text, rectangle, circle, line, image, or freehand draw. Click on the page to place it. Drag to move, resize, or rotate.

3

Save and download

Click “Save” to flatten your edits into the PDF. The original is never modified. Download starts automatically.

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

Why use this tool

DukPdf’s Edit PDF tool lets you add text, shapes, images, and freehand annotations directly on top of any PDF. Every edit is a visual layer on the original — your source file is never modified until you save the result. All editing happens in your browser, so the document stays on your device from the moment you open it to the moment you download the edited copy. To redact (permanently black out) sensitive content, use Redact PDF after editing. To sign the result, use Sign PDF. For a step-by-step guide, see our edit PDF guide.

When you'd use this

Fill a PDF form

Add text into fillable form fields, checkboxes, and signature boxes without printing, filling by hand, and scanning.

Annotate a document

Highlight, underline, and add margin notes to a PDF you’re reading — research papers, contracts, manuals.

Mark up for review

Add comments, circles, and arrows to a draft you’re sending back to a colleague or client.

Add a cover image

Drop a logo, photo, or signature image onto the first page of a report or proposal.

Why this matters for your privacy

☁️ CLOUD PDF TOOLS
📄 your-file.pdf
↓ uploaded over the internet
☁️ their server

A copy of your document sits on someone else’s infrastructure — deleted on their schedule, not yours.

✗ OUT OF YOUR HANDS
DukPdf
📄 your-file.pdf
⟳ stays right where it is
💻 your device

Processed by your own browser, start to finish — on your machine, under your control.

✓ STAYS ON YOUR DEVICE

We send the software to your file — not your file to our servers.

Edit PDF — questions

Can I edit existing text in the PDF?

No — the Edit tool adds new layers (text, shapes, images, annotations) on top of the original. Existing text is not editable in-place. For redacting (permanently blacking out) existing text, use Redact PDF.

Can I undo my edits?

Yes. The editor has a full undo/redo history (Ctrl+Z / Ctrl+Shift+Z). Every change is reversible until you click “Save” to flatten the result.

Will the original PDF be modified?

No. All edits are held in memory as a layer on top of the original. Your source file is never touched. Only the final “Save” produces a new PDF containing both the original and your edits.

Can I edit across multiple pages?

Yes. The toolbar lets you switch between pages. Each page gets its own set of edits. You can also copy an edit from one page and paste it onto others.

Is my PDF uploaded during editing?

No. The editor runs entirely in your browser using PDF.js. No page is sent to a server. Zero upload requests in the Network tab.

What file format does the result save as?

Standard PDF. The saved file opens in any PDF reader — Adobe Acrobat, Preview, Chrome, your phone. No proprietary format.

Tools that pair with edit pdf

→ Sign PDFAdd your signature to the result→ Add WatermarkStamp a label on every page→ Redact PDFPermanently black out content→ Add Page NumbersNumber pages after editing→ Merge PDFCombine with other PDFs→ Protect PDFLock the edited result
🔒 DukPdf — YOUR FILES NEVER LEAVE YOUR DEVICE

Ready to edit a pdf? Your files stay yours.

No server uploads. No watermark. Just open a tool, drop your files, and download the result. Your original files are never modified.

↑ Back to upload