Add Signature to PDF

Draw and add your signature to PDF documents

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About PDF Signing

Add your handwritten signature to PDF documents. Draw your signature using your mouse or touchscreen, then place it anywhere on any page. Perfect for signing contracts, forms, and letters.

Benefits of PDF Signing

Draw your signature naturally
Place signature on any page
No account or software needed
All processing in your browser

Sign your PDF documents with professional, handwritten signatures instantly. Our digital signer allows you to draw your signature using any input device and apply it permanently to your files. Ideal for remote work, legal compliance, and paperless workflows. Every signature is processed locally on your machine, ensuring your biometric signature data and sensitive documents are never sent over the web.

Electronic signing is the digital equivalent of signing a paper document by hand. It allows you to legally authorize and validate documents such as contracts, invoices, and NDAs without the need for printing, physical ink, or scanning. Unlike digital signatures that require complex cryptographic certificates, electronic signatures are visual representations of your consent that are embedded directly into the PDF content stream as transparent image objects.

Business Contracts & NDAs

Sign legal agreements and non-disclosure documents remotely to speed up negotiations and onboarding processes.

Real Estate & Rental Agreements

Quickly sign lease agreements or sales contracts on-the-go using a tablet or smartphone for a natural handwriting feel.

School & Government Forms

Complete permission slips, applications, and official government declarations without needing access to a printer or scanner.

Our tool uses the HTML5 Canvas API to capture high-resolution stroke data from your mouse or touchscreen. This data is converted into a transparent PNG and merged into the PDF using the pdf-lib library. By modifying the PDF's internal page object tree, the signature becomes a permanent part of the document rather than a temporary annotation. This client-side approach ensures that your signature and document stay in your browser's local memory.

Our PDF signer is optimized for all modern browsers including Chrome, Firefox, Safari, and Edge. It includes specialized touch-event handling for mobile devices and tablets, providing a smooth signing experience with fingers or styluses. Compatible with Windows, macOS, iOS, and Android.

Frequently Asked Questions

Is an electronic signature legally binding?

In many countries, including the US (under the ESIGN Act) and the EU (under eIDAS), electronic signatures are legally recognized for most common business transactions. However, for certain high-stakes documents like wills or real estate deeds, you should consult local legal requirements.

Is my signature stored on your servers?

No. We do not store your signature or your documents. The entire signing process happens within your browser's RAM. Once you close the tab, your signature data is cleared for your security.

Can I sign on my iPad or mobile phone?

Yes! Our tool is mobile-responsive. You can use your finger or a digital stylus to draw a precise signature directly on your touchscreen device.