# Sign PDF for e-commerce sellers

_Updated July 2026 · Arthize · https://arthize.com/for/ecommerce-sellers/sign-pdf_

Arthize lets e-commerce and retail sellers sign a PDF in a private workspace — free, with no watermark. Signing a PDF lets you draw, type or add a digital signature and fill form fields, so you never print, sign and rescan a document again.

## Why e-commerce sellers sign a PDF

A seller merges a month of invoices into one file for the accountant, converts a supplier's PDF price list to Excel, and compresses the product catalogue for a marketplace upload.

**Built for invoices.** Whether it's invoices, packing slips, catalogues, Arthize's sign pdf keeps the work inside your private workspace. Order and customer data is confidential; private processing avoids leaking it to a free tool.

## What matters when you sign a PDF

A clear electronic signature is legally valid for everyday agreements in most countries.

Cryptographic digital signatures bind the signature to the document for higher assurance.

You can fill form fields and sign in the same tool without printing.

## How to sign a PDF

1. **Open the sign tool** — Sign in and open the sign-and-fill tool.
2. **Create your signature** — Draw it, type it in a signature font, or use a digital certificate.
3. **Place it and fill the form** — Drop the signature where it belongs and fill any fields, dates or checkboxes.
4. **Download the signed PDF** — Save the signed document with no watermark.

## FAQ

### How do e-commerce sellers sign a PDF for free?

Signing a PDF lets you draw, type or add a digital signature and fill form fields, so you never print, sign and rescan a document again. On Arthize it's free with no watermark, and the file is deleted after the job — which is why e-commerce and retail sellers can use it for invoices without a confidentiality risk.

### Is it private to sign a PDF sensitive invoices?

Yes. Order and customer data is confidential; private processing avoids leaking it to a free tool. Files are processed inside your private Arthize workspace and deleted after the job.

### How do I sign a PDF online for free?

Signing a PDF lets you draw, type or add a digital signature and fill form fields, so you never print, sign and rescan a document again. On Arthize it's free with no watermark and processed privately.

### Is an electronic signature on a PDF legally valid?

Signing a PDF lets you draw, type or add a digital signature and fill form fields, so you never print, sign and rescan a document again. On Arthize it's free with no watermark and processed privately.