# Password Protect PDF for contractors

_Updated July 2026 · Arthize · https://arthize.com/for/contractors/protect-pdf_

Arthize lets construction and trades teams password-protect a PDF in a private workspace — free, with no watermark. Protecting a PDF encrypts it with a password, so only people with the password can open the file — the encryption travels with the document.

## Why contractors password-protect a PDF

A contractor merges a bid, permit and change order into one project file, signs a document from their phone on site, and compresses a photo-heavy progress report to email the client.

**Built for bids.** Whether it's bids, permits, change orders, Arthize's password protect pdf keeps the work inside your private workspace. Bids and client contracts are commercially sensitive; a private workspace keeps them secure.

## What matters when you password-protect a PDF

Password protection encrypts the PDF so it can't be opened without the password.

The encryption travels with the file, unlike a folder lock that stays on your computer.

A separate permissions password can restrict printing or copying.

## How to password-protect a PDF

1. **Open the protect tool** — Sign in and open the Protect tool.
2. **Add your PDF** — Upload the document you want to encrypt.
3. **Set a password** — Choose a strong open password and, optionally, a permissions password.
4. **Download** — Get an encrypted PDF that requires the password to open.

## FAQ

### How do contractors password-protect a PDF for free?

Protecting a PDF encrypts it with a password, so only people with the password can open the file — the encryption travels with the document. On Arthize it's free with no watermark, and the file is deleted after the job — which is why construction and trades teams can use it for bids without a confidentiality risk.

### Is it private to password-protect a PDF sensitive bids?

Yes. Bids and client contracts are commercially sensitive; a private workspace keeps them secure. Files are processed inside your private Arthize workspace and deleted after the job.

### How do I password-protect a PDF?

Protecting a PDF encrypts it with a password, so only people with the password can open the file — the encryption travels with the document. On Arthize it's free with no watermark and processed privately.

### Is a password-protected PDF actually encrypted?

Protecting a PDF encrypts it with a password, so only people with the password can open the file — the encryption travels with the document. On Arthize it's free with no watermark and processed privately.