Free PDF Digital Signature Add Electronic Signatures
Add digital signatures to PDF documents for authenticity and security. Create legally binding electronic signatures with certificate validation and authentication features.
Legally Binding
Create signatures that meet legal requirements and standards
Certificate Validation
Advanced certificate validation and authentication
Custom Appearance
Customize signature appearance, position, and metadata
PDF Digital Signature
Add digital signatures to PDF documents for authenticity and legal compliance using your digital certificate.
Drag & drop PDF file here, or click to select
Maximum file size: 100MB
Drag & drop certificate file here, or click to select
Supports .p12 and .pfx files
🔐 Digital Signature Benefits
How to Add Digital Signatures
Upload PDF
Upload your PDF document that needs digital signature authentication.
Create Signature
Draw, type, or upload your signature image and configure appearance settings.
Position & Apply
Position your signature on the document and apply with certificate validation.
Download
Download your digitally signed PDF with legal authentication and security.
Frequently Asked Questions
Are digital signatures legally binding?
Yes, digital signatures created with our tool meet legal requirements in most jurisdictions. They provide authentication, non-repudiation, and integrity verification for your documents.
What's the difference between digital and electronic signatures?
Digital signatures use cryptographic technology to verify authenticity and detect tampering, while electronic signatures are simply digital representations of handwritten signatures.
Do I need a digital certificate?
For basic signatures, no certificate is required. For advanced signatures with legal compliance, you can use your own certificate or we can help generate one for enhanced security.
Can signatures be verified later?
Yes, digital signatures can be verified at any time to confirm the signer's identity and ensure the document hasn't been modified since signing.
Is my signature data secure?
Absolutely. All signature processing is done locally in your browser. Your signature data and documents are never uploaded to our servers, ensuring complete privacy.