# Sign PDFs Online Easily

URL: https://pdf.net/sign-pdf
Description: Sign PDFs and other documents on any device with ease using our online PDF signature tool. Convenient, secure, and hassle-free.

Add your signature to any PDF document in seconds. Our handy PDF signature tool works on any device—no software downloads needed.

## How to Sign a PDF File

1. Upload your file
2. Add your electronic signature to it
3. Download the signed file

## FAQ

### Are eSignatures legally binding?

Yes, electronic signatures are legally binding in most countries worldwide, recognized under major regulations including the ESIGN Act in the United States, eIDAS in the European Union, and similar laws across other regions. When properly executed with authentication measures and audit trails, eSignatures carry the same legal weight as handwritten signatures.

### How secure is my document after signing?

Your document is well-secured after signing. pdf.net uses HTTPS encryption to keep your signed documents private and protected.

### Are there any limitations on the file size?

Yes, there is a 500 MB file size limit to the documents you can upload to pdf.net. If you want to add your electronic signature to PDF files that are larger than 500 MB, we recommend compressing the document first to reduce its size.

### Do I need to install any software to use the signature tool?

No, you don’t need to install any software to use our PDF signature tool; you can simply sign PDFs online by uploading your documents and adding your signature.

### How do I import my signature into a PDF?

To import your signature into a PDF, simply upload your document to pdf.net, then choose how you’d like to add your signature—draw it with your mouse or touchscreen, type it out, or upload an image of your handwritten signature.

### What types of documents can I sign?

You can sign contracts, agreements, <pdfFormsLink>forms</pdfFormsLink>, invoices, applications, consent forms, and many other types of PDF documents.

### Can I sign password-protected PDFs?

If you know the password and the document allows editing, you may be able to sign the PDF. Restrictions depend on the document’s security settings.

### Can I upload an image of my handwritten signature?

Yes. If you already have a scanned signature image, you can upload it to your PDF document.

### Can I add multiple signatures to a PDF?

No, you can’t add multiple signatures to a PDF at once. If you want to add multiple signatures, you have to repeat the process for adding PDF signatures.

### Can I request signatures from others?

Yes, pdf.net lets you <requestSignatureLink>request signatures</requestSignatureLink> from other people. Simply upload your document, add the required signature fields, and share it with the recipients via email or link. They can sign online from any device, no account or software needed.

### Can I use pdf.net on a Mac, Linux, or smartphone?

Yes, you can use pdf.net on a Mac, Linux, or smartphone to sign PDF documents. Our online PDF signer offers the same functionality, regardless of the device type.