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Sign PDF files

Apply drawn, typed, or image-based visible electronic signatures to documents in seconds.

or drop PDF here
100% In-Browser & Zero-Upload Privacy
Instant High-Performance Processing
Max 80 MB • Free Forever
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How to Sign PDF Online for Free

Follow these quick, easy steps to process your files securely inside your web browser.

Step 1

Upload Agreement

Select the PDF contract requiring your signature.

Step 2

Create Signature

Draw your signature with mouse/touch or type your name.

Step 3

Place on Document

Drag the signature to the designated signature line.

Step 4

Download Signed PDF

Click "Sign & Download" to export your completed contract.

Why Use BizAiPro Sign PDF?

3 signing options: Draw freehand, Type styled signature, or Upload photo
Add signing dates, printed names, and company titles
Position signature precisely on any page with resize handles
100% confidential — agreements remain in browser memory

Frequently Asked Questions about Sign PDF

Is an electronic signature legally binding?

In many jurisdictions under the ESIGN Act and eIDAS, visible electronic signatures are recognized for standard commercial agreements.

Are my files and documents uploaded to any server?

No. BizAiPro processes your documents 100% locally in your web browser using client-side WebAssembly and modern JavaScript. Your files never leave your computer.