Sign PDF
Add digital signatures to PDF documents for free. Sign PDFs with text or image signatures securely online.
How to Sign a PDF — Step by Step
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1
Upload your PDF
Click the upload area or drag your PDF onto it. Verify the document is the final version before signing — edits are easier before a signature is embedded.
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2
Create your signature
Draw your signature with your mouse or touchscreen, type your name in an italic style, or upload a PNG/JPG image of your handwritten signature.
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3
Position and apply
Drag the signature to the correct location on the page. Choose which page(s) to sign, then download the signed PDF.
Visual Signatures vs. Cryptographic Digital Signatures
This tool adds a visual signature to your PDF — a drawn, typed, or image-based mark that appears on the page the way a handwritten signature looks. It is widely accepted for everyday agreements, internal approvals, forms, and letters where a visible record of acknowledgement is needed.
A cryptographic digital signature is different: it uses a certificate to verify the signer's identity and detect any changes to the document after signing. For legal contracts requiring strong identity verification or tamper-evident records, consult a purpose-built e-signature platform.
Once signed, protect the document by adding a password with Protect PDF to prevent others from editing the signed version. If the file is large, compress it with Compress PDF before sending. Read the complete signing guide for more detail on preparing documents and what to do after signing.
Frequently Asked Questions
Is the sign PDF tool free to use?
Yes, our sign PDF tool is completely free. Add digital signatures to your PDFs with no registration and no watermarks on your signed documents.
Can I use my own signature image?
Yes, you can upload your own signature image (PNG or JPG). Alternatively, you can type your name to create a text-based signature.
Are my signed PDFs legally valid?
This tool adds visual signatures to PDFs. For legally binding digital signatures with certificates, consult with legal professionals about your specific requirements.