# Sign PDF for startups

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

Arthize lets startup founders and teams 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 startups sign a PDF

A founder exports the pitch deck to PDF, merges it with financials into a data-room file, and sends a SAFE for e-signature — without paying for enterprise document software.

**Built for pitch decks.** Whether it's pitch decks, cap tables, contracts, Arthize's sign pdf keeps the work inside your private workspace. Fundraising materials and cap tables are highly confidential; private processing is critical.

## 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 startups 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 startup founders and teams can use it for pitch decks without a confidentiality risk.

### Is it private to sign a PDF sensitive pitch decks?

Yes. Fundraising materials and cap tables are highly confidential; private processing is critical. 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.