Protect PDF with a Password – Free Online Tool

Protect PDF with a password

Lock any PDF so it opens only with your password. Free, no sign-up.

AES encryptionUp to 20 MBWorks on mobile
1Choose your PDF
Tap to select a PDFor drag & drop it here · max 20 MB
PDF
2Set a password
Use 8+ characters with numbers and symbols.

Uploading…

Your PDF is protected

It will ask for your password every time it is opened.

Download protected PDF
🔒Your file is sent over an encrypted connection only to lock it, and is not kept by Revgrow360. Save your password safely — a lost password cannot be recovered.
Protect Pdf – Revgrow360
Protect Pdf: at a glance

Good to know: password-protected PDFs use encryption defined in the PDF standard. Read more about PDF encryption on Wikipedia or browse our free hotel tools.

How to password-protect a PDF

  1. Click Select PDF file and choose the document.
  2. Type a strong password (at least 8 characters, with letters, numbers and a symbol).
  3. Click Protect PDF, wait a few seconds, then download the protected file.

Anyone who opens the new file will need the password. Keep your original unprotected copy in a safe place, and share the password through a different channel than the file itself, for example send the file by email and the password by phone or WhatsApp.

When hotels should protect PDFs

  • Guest documents: registration cards, ID copies and invoices that contain personal details.
  • Contracts and rate agreements with travel agents and corporate clients.
  • Payroll and HR files: salary slips, appointment letters and staff records.
  • Financial reports shared with owners, partners or your accountant.

India's Digital Personal Data Protection Act expects businesses to take reasonable security safeguards for personal data. A password on sensitive PDFs is a simple first step.

How your file is handled

To add the password, your PDF is sent over an encrypted (HTTPS) connection to a third-party PDF processing service, and the protected copy is returned to you for download. Do not upload documents you are not allowed to share with a processing service.

Frequently asked questions

Can I remove the password later?

Yes. Open the file with the password in a PDF editor and save a copy without security, or keep your original unprotected file.

What if I forget the password?

We cannot recover it. Store passwords in a password manager and keep the original file.

Is this tool free?

Yes, it is free to use with no sign-up.

Need more document tools? Try our JPG to PDF converter, PDF to image converter and all free hotel tools.