Protect PDF File
Add a password to your PDF files to encrypt them and prevent unauthorized access. Keep your sensitive documents safe and secure.
The Ultimate Tool to Password Protect PDF Files
Secure your sensitive documents with the strongest encryption. Our free online PDF protector allows you to add a password to any PDF file, preventing unauthorized access and ensuring your information remains confidential. It's fast, easy, and completely secure.
How to Encrypt a PDF in 3 Simple Steps
Click the 'Select PDF file' button, or drag and drop your document into the upload area. You can also import a file directly from Google Drive or Dropbox.
Enter a strong password in the designated field, then type it again to confirm. A secure password is your best defense for protecting the document's contents.
Click the 'Protect PDF' button. Our tool will instantly encrypt your file with the password. Your new, secure PDF will then download automatically to your device.
Why Choose Our PDF Protection Tool?
- ✔Strong AES Encryption: We don't just lock your PDF; we encrypt it. Your file is protected with strong AES encryption, making it incredibly difficult for anyone to access without the correct password.
- ✔Unbreakable Security & Privacy: Your privacy is our top priority. All processing happens in your browser, and your files are never sent to our servers. They are permanently deleted from memory after processing.
- ✔No Limits, Completely Free: Protect as many PDF files as you need, for free. There are no watermarks, no file size limits, and no registration required to use the full power of our tool.
- ✔Works on Any Device: Our PDF protector is a browser-based tool that works on all modern operating systems, including Windows, Mac, Linux, Android, and iOS. Secure your files from anywhere.
Your PDF Security Questions, Answered
Is this tool really secure? Are my files safe?
Yes, it's extremely secure. Unlike other online tools, our PDF protector processes your files directly in your web browser. This means your PDF never leaves your computer and is never uploaded to our servers, offering the highest level of privacy and security.
What happens if I forget the password?
The password you set is the only key to unlock your document. Due to the strong encryption we use, there is no way to recover a forgotten password. Please make sure to store it in a safe place.
How strong is the encryption?
Our tool uses AES (Advanced Encryption Standard), which is the same encryption standard used by governments and security institutions worldwide. It is considered virtually unbreakable by brute force.
Can I remove the password later?
Yes, you can use a "PDF Unlocker" tool to remove the password. However, you will need to know the correct, current password to do so. Without it, the file cannot be decrypted.