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We protect your file with strong 128 - bit AES encryption. This will make it impossible to open or remove the protection without the correct password. So, don’t forget it!

We don’t keep your password or your file on our server. For more information please read our privacy policy.

Encrypt and Protect PDF with Ease

Entire File Protection

CocoDoc adds value to the privacy and the security of your files. Whenever a file is uploaded on the servers, they go through secure SSL connections. These files are only stored temporarily, and the servers permanently remove them within an hour.

Easy-to-use Password Protection

Choose a strong password for your PDF, and CocoDoc uses modern encryption methods to keep the imported file safe. We recommend that you use a strong and secure password. The password can be a non-dictionary word containing 7 characters or more along with uppercase letters, lowercase letters, numbers, and symbols.

Support all Platforms

We believe that security should not be limited to a single medium. It is why we have made our web application compatible with a wide range of platforms that include Windows, Linux, and macOS. It ensures you can encrypt files from anywhere through any compatible device.

Reliable PDF Password Protection

A secure and strong password should be used to prevent unauthorized access to your important data within the file. Our password encryption ensures that no one can crack your password within a realistic timeframe using a regular computer.

Password-protection in the Cloud

Encrypt your files with ease as no additional software is required to secure your files. Everything is done on the cloud. Simply upload your file from any device, add a secure password to your PDF, and your encrypted PDF will be ready to download.

Works in the Cloud

Securing your file through strong encryption techniques doesn’t require any software to be installed on your device. CocoDoc is browser-based. Moreover, the encryption process happens entirely on the cloud. Once it completes the process, the password is instantly deleted from the cloud. Besides, the file is also removed after an hour.

How to Add Password to PDF?

Follow the steps below to learn how to add password to PDF document:

  • Upload your PDF using the simple drag and drop feature. You can also upload your files by browsing for the file through your PC.
  • Select a secure password to encrypt your file. It’s recommended to use 7 character words, both uppercase and lowercase, along with numbers and symbols for a very strong password.
  • Press the ‘Encrypt’ button to start the encryption process. The encryption of your PDF happens on the cloud, so no additional software is required.
  • Now simply press the download button to obtain your secure encrypted pdf.
Protect PDF

FAQs

How to Create a Strong Password to Protect PDF?

Password fields allow passwords that can include all sorts of alphanumeric combinations. Choose one that is a non-dictionary word and has uppercase letters, lowercase letters, symbols, and numbers.

How to Encrypt a PDF Online for Free?

All you need to do is upload your file through CocoDos’s simple drag and drop feature and then encrypt your file by pressing the encrypt button. All of the encryption processes take place on the cloud, so no additional software is required.

Is it Possible to Edit a Secured PDF?

Secure PDF documents cannot be altered unless you are the owner. There is a feature of CocoDoc to remove the password from the PDF, which is secure and efficient.

Which Version of Windows and MacOS Is Supported by This Tool?

CocoDoc is a web-based tool, which allows you to operate it from any browser without the requirement for installing any software. Moreover, it means that CocoDoc will work on all active versions of Windows(Windows XP/7/8/8.1/10), and macOS X(from OS X 10.5 to OS X 10.15).

Learn with CocoDoc

How to Encrypt a PDF

If you want to learn how to encrypt your PDF, give this article a read!

How to Unlock PDF Online

We have ways to unlock PDF and access the locked content. Use CocoDoc to unlock PDF online within minutes. Other methods include the Acrobat option.

How to Remove Watermark From PDF

A watermark in a PDF file is a common way of protecting documents against copyright theft. However, it can be a distraction when reading.

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