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MyPDF Blog
March 22, 20262 min read

Sign PDF — Add Signature to PDF Online Free

Add your signature to PDF documents online. Draw, type, or upload your signature. Free electronic signature tool — no sign-up needed.

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Sign PDF Documents Electronically

Need to sign a contract, agreement, or form? MyPDF's Sign PDF tool lets you add your signature to any PDF document — draw it, type it, or upload an image of your signature.

How to Sign a PDF

Step 1: Upload Your PDF

Open the Sign PDF tool and upload the document you need to sign.

Step 2: Create Your Signature

Choose how to add your signature:


  • Draw — Use your mouse or finger (on touch screens) to draw your signature

  • Type — Type your name and choose a signature font style

  • Upload — Upload a photo or image of your handwritten signature


Step 3: Place and Download

Position your signature on the document, adjust size if needed, and download the signed PDF.

Common Documents to Sign

  • Contracts and agreements
  • Lease agreements and rental forms
  • Tax forms and declarations
  • Employment offers and NDAs
  • Medical consent forms
  • School permission slips
  • Insurance documents
  • Purchase orders

Tips

  1. Position precisely — Zoom in to place your signature exactly on the signature line
  2. Use transparent background — When uploading a signature image, use PNG with transparent background
  3. Flatten after signing — Use Flatten PDF to make the signature permanent
  4. Protect after signing — Password-protect the signed document to prevent tampering

Frequently Asked Questions

Are electronic signatures legally valid?

In many jurisdictions, electronic signatures are legally binding under laws like ESIGN (US), eIDAS (EU), and similar regulations. For high-value legal documents, consult your legal advisor.

Can I sign multiple pages?

Yes. Place signatures on any or all pages of your document.

Is my signature stored?

No. Your signature is applied to the PDF and then all data is deleted from our servers after 15 minutes. We never store your signature.

Is it free?

100% free — no account, no watermarks, no limits.
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