Sign PDF
Draw or upload a visual signature and place it securely on any PDF page.
Your PDF is processed locally in your browser.
PDFSimplify processes documents on your device using client-side WebAssembly and Web Workers. No document data is transmitted to our servers or external cloud services during processing.
Visual Signature Notice
This tool adds a visual signature to your PDF document. It is not a cryptographic digital certificate / PKI signature. All drawing and placement happens 100% locally on your device.
Drop your PDF here to sign
Draw or upload your signature and place it anywhere on your document
No file size limit imposed by server • Processed locally in your browserHow Sign PDF Works in Your Browser
Captures your signature mark as a high-density vector canvas, maps coordinate positions to PDF page units, and embeds the image into the PDF stream locally.
Why client-side processing is more private:
Unlike conventional online converters, your documents never traverse external networks to third-party processing servers. Everything happens inside your local machine’s memory.
How to Use Sign PDF
Upload PDF
Select the document you need to sign.
Create Signature
Draw your signature or upload an image.
Position & Save
Drag to position on the page, resize, and export.
Key Features
Helpful Tips
- •Use a tablet or smartphone touch screen for natural handwriting signature curves.
Troubleshooting & Notes
- •This produces a visual signature mark, not a cryptographic PKI digital certificate.
Frequently Asked Questions
Is this a cryptographic digital certificate?↓
No. This tool adds a visual signature mark to the PDF page. It is not a cryptographic digital certificate or PKI signature.
Is my signature stored on your servers?↓
Never. PDFSimplify has no backend servers or databases. Your signature exists only in your browser memory during the session.
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