Protect your PDF files with a password
Block access to your PDF documents with our online module. It enables you to add a password and encrypt your PDF file to protect it.
The 2-in-1 way to protect PDF files
Password
To lock your PDF file, we first enable you to create the password of your choice. For optimum protection of your PDF, we advise you not to select an existing password and also to have a password with at least 7 characters, including a number, a capital letter and a special character (dash, question mark, etc.). That way, you limit the risk of any ill-intentioned person discovering the password for your PDF.
Encrypted PDF
Once imported on to our platform, your PDF file is encrypted using two advanced encryption protocols: ARC4 (128-bit ARC-FOUR Encryption Standard) and AES (256-bit Advanced Encryption Standard). With your PDF document doubly protected in this way, it becomes virtually impossible for a third party to view the file if they don’t know the password.
Online assistance
Don’t know which password to choose? Locking function not working? Can’t open your protected PDF? Whatever the problem, you can contact our experts by e-mail. Available 24/7, they will advise and guide you to help you block your PDF documents effectively and securely.
Data protected
To guarantee the security of your PDF documents, PDF Smart never records the passwords you choose to block access to your documents. So don’t forget the password that you have registered in our online tool! Also, your locked PDF file is not kept on our servers. That way, you can be sure that your privacy is protected.
Pixellation
To protect your PDF files even more effectively, you can pixellate them by converting them to an image format (JPG, PNG, etc.). That way, the layers of your PDF document are flattened, preventing a third party from altering the information in the file. You can then encrypt your document and add a password.
7-day trial
If you have lots of PDF documents you want to lock, the ideal thing would be to activate your period. For 7 whole days, you can then block as many PDF files as you like. You will also have access to all our other online PDF tools during this period, giving you a simple way to compress, convert or modify your files.
Discover the PDF editor's features
Edit your PDFs easily and efficiently with our intuitive, user-friendly tool.
1
Edition
Want to edit the content of your PDF? Our tool allows you to do so in just a few clicks while preserving the original layout.
2
Security
Looking to enhance the security or authentication of your PDF? Sign, lock, or apply a password to safeguard the confidentiality of your documents.
3
Conversion
Easily switch between file formats! Convert a Word document to PDF or vice versa effortlessly with PDFSmart, maintaining high quality throughout.
All our tools available to use
How to lock a PDF file online
1. Import the PDF document to be protected.
2. Add a password to your PDF file.
3. Download your locked and encrypted PDF document.
PDF Smart: your PDF management platform
PDF Smart gives you the benefit of a professional solution for blocking your PDF documents. Dual encryption protocol, add a secure password, privacy rules, etc. – everything you need to ensure the protection of your PDF files, stopping them from being viewed by unauthorised persons.
Our expertise in PDF management also enables us to offer you numerous other tools. From our platform, you can unlock a PDF protected by a password, modify your documents online or convert them into the format of your choice.
