Sign PDF Online (Free, Private, No Upload)

Add electronic signatures to PDF documents quickly and securely without uploading to external servers. This tool enables you to sign contracts, agreements, forms, and other documents entirely within your browser, maintaining complete privacy and control over sensitive information. Whether you need to sign employment contracts, legal agreements, permission forms, NDAs, or invoices, the signing process happens locally on your device with no data transmission to third parties. Choose from three convenient signature methods: draw your signature with a mouse, touchpad, or touchscreen for a natural handwritten appearance; type your name and select from elegant signature fonts for a clean, professional look; or upload an existing signature image from a scanned document or saved file. Beyond signatures, you can add date stamps to indicate when you signed the document, ensuring proper documentation and timestamp records. The tool preserves all PDF formatting, fields, and content while seamlessly integrating your signature exactly where you need it. This is perfect for remote workers who need to sign documents without printing, individuals who want to avoid uploading sensitive contracts to unknown servers, businesses processing routine agreements, freelancers signing client contracts, or anyone seeking a quick, private way to add their signature to PDFs. Unlike cloud-based e-signature services that store your documents and track your signing behavior, this browser-based approach ensures your signed PDFs never leave your control. The resulting signed PDF is immediately ready to download and share with confidence, knowing your signature has been applied securely and privately without compromising the original document's integrity.

How to Sign a PDF

  1. Click Choose PDF and select the document you want to sign.
  2. Create your signature by choosing one of three methods:
    • Draw: Use your mouse or touchscreen to draw your signature
    • Type: Enter your name and select a signature font
    • Upload: Use an existing signature image file
  3. Click Place Signature and click on the PDF where you want the signature to appear.
  4. Optionally add a date stamp by clicking Add Date Stamp.
  5. Click Download Signed PDF to save your signed document.

Related tools: Fill & Flatten Forms, Protect PDF, Add Watermark

FAQ

Is this a legally binding signature?

This tool creates an electronic signature (e-signature), which is legally recognized in most countries including the United States (under ESIGN Act and UETA), European Union (eIDAS regulation), and many others. E-signatures have the same legal standing as handwritten signatures for most documents. However, certain documents like wills, court orders, and some real estate transactions may still require traditional ink signatures or notarization. Consult legal counsel for specific requirements in your jurisdiction.

Is my signed PDF secure and private?

Yes, all signing happens entirely in your browser using JavaScript. Your PDF is never uploaded to any server, ensuring complete privacy for sensitive documents like contracts, NDAs, or financial agreements. The signed PDF exists only on your device until you choose to share it.

Can I add multiple signatures to one document?

Yes, you can add as many signatures and date stamps as needed to your PDF. This is useful for documents requiring signatures in multiple locations or when multiple parties need to sign the same document (though each person would need to add their own signature individually).

What's the difference between this and a digital signature?

This tool creates an electronic signature (visual representation of your signature added to the PDF). A digital signature is a cryptographic signature that includes certificate-based identity verification and tamper detection. E-signatures are sufficient for most business documents, while digital signatures are required for high-security scenarios like government submissions or regulated industries. For maximum security, consider using the Protect PDF tool to password-protect your signed document.

Can recipients verify my signature?

This tool creates a visual e-signature that recipients can see in the PDF. It does not include cryptographic verification like a digital signature would. For added authenticity and security, consider password-protecting the signed PDF to prevent unauthorized modifications, or use a dedicated digital signature service if your use case requires certificate-based verification.

What image formats are supported for uploaded signatures?

You can upload signature images in common formats including PNG, JPG, JPEG, and GIF. PNG is recommended for signatures as it supports transparent backgrounds, making the signature blend naturally with the PDF. For best results, use a high-resolution image with your signature on a transparent or white background.

Can I adjust the signature size or position after placing it?

Currently, once placed, signatures have a fixed size and position. If you need to reposition a signature, you can remove it and place a new one. Future updates may include drag-and-drop repositioning and resizing capabilities.