Sign PDF — add your signature free

Draw your signature, then drop it onto any page of your PDF and resize it. Your document never leaves your browser.

Drop a file here, or browse

Processed in your browser — nothing is uploaded.

🔒 100% free · your files never leave your browser

Use this free tool to sign PDF documents online. Draw your signature with a mouse or finger, choose the page and position, and add it to contracts, forms and agreements in seconds.

When you sign PDF files with NeuroScans, everything happens in your browser — your document and signature are never uploaded. It’s a free, private way to add an electronic signature with no sign-up.

How to Sign PDF

  1. Upload the PDF you want to sign.
  2. Draw your signature in the pad.
  3. Choose the page and where the signature should go.
  4. Click “Sign PDF” and download the signed document.

Why use NeuroScans Sign PDF?

  • Draw your signature with a mouse, trackpad or finger.
  • Place it on any page, in any corner, at any size.
  • Sign contracts, forms and agreements in seconds.
  • No upload — document and signature stay in your browser.
  • Free electronic signing with no sign-up.

When to use this tool

Signing a PDF online is perfect for returning a signed contract, completing a form, or approving an agreement without printing and scanning. Because both your document and signature stay on your device, signing is private and secure.

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100% privateFiles are processed in your browser and never uploaded.
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Always freeNo subscription, no limits, no watermark on your output.
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No sign-upNo account or install — just open the tool and go.

Frequently asked questions

How do I sign a PDF online for free?

Upload your PDF, draw your signature, pick the page and position, then click “Sign PDF”. Your signed document downloads instantly — free, no sign-up.

Is signing a PDF here legally valid?

This adds an electronic signature image to your document, which is widely accepted for everyday agreements. For regulated e-signatures, check the requirements in your jurisdiction.

Is my document uploaded when I sign it?

No. Both your PDF and your signature stay in your browser — nothing is uploaded, so signing is completely private.

Can I sign a PDF on my phone?

Yes. You can draw your signature with your finger directly on the signature pad in a mobile browser, then place it on the page.

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