How to Protect a PDF From Editing and Copying (Free)
Prevent others from editing, copying or modifying your PDF. Free methods for adding permissions and passwords to PDF files.
Types of PDF Protection
PDF protection comes in two forms:
Open password (User password) — prevents anyone from opening the document without the password. The strongest form of protection.
Permissions password (Owner password) — allows opening but restricts what the reader can do: editing, copying text, printing, etc.
For most use cases, an open password is the most effective protection.
How to Protect a PDF From Editing on Breklo
Breklo's Password Protect PDF tool adds both an open password and editing restrictions in one step:
1. Go to Password Protect PDF
2. Upload your PDF
3. Enter a password
4. Click Protect PDF
5. Download the protected PDF
The protected PDF:
- Cannot be opened without the password
- Cannot be edited or modified
- Cannot have text copied from it
- Can still be printed (printing remains enabled)
How Effective Is PDF Protection?
PDF protection prevents casual editing but is not unbreakable. Determined users with the right software can sometimes bypass permissions. For truly sensitive documents, consider:
- Using a strong, unique password
- Sharing only with trusted recipients
- Not including sensitive data in PDFs if possible
For business and personal use, password protection is more than sufficient to prevent accidental or casual modification.
Protecting PDFs in Microsoft Word
When saving a Word document as PDF, you can add protection in the export dialog:
1. Go to File → Save As → PDF
2. Click Options (Windows) or More options (Mac)
3. Check Encrypt the document with a password
4. Enter a password
Protecting PDFs in Preview on Mac
1. Open the PDF in Preview
2. File → Export as PDF
3. Click Permissions
4. Check editing and copying restrictions
5. Set a permissions password
What About Watermarking?
If you need to track who shared a document, adding a visible watermark is more effective than password protection. Watermark tools add text or images to each page that remain visible in screenshots and printouts.
Try these free tools
Frequently asked questions
Can I prevent someone from copying text from my PDF?
Yes. Adding a permissions password with copying disabled prevents standard text copying in PDF readers. Note that screen screenshots can still capture text visually.
What is the difference between an open password and a permissions password?
An open password prevents anyone from opening the document without it. A permissions password allows opening but restricts actions like editing, copying and printing. For strong protection, use an open password.
Can someone bypass PDF password protection?
Strong passwords with AES encryption are very difficult to bypass. However, permissions-only protection (no open password) can be removed with some PDF tools. For maximum security, use an open password.
Does protecting a PDF affect its file size?
Only very slightly. The encryption adds a small amount of data to the file structure.
Can I add protection to a PDF that is already password protected?
You would need to open it first (with the existing password), then re-save with the new protection settings.
Is PDF password protection free on Breklo?
Yes, completely free with no limits and no signup required. Processing happens in your browser.