PDF & # 39; s seem the internet closest to a paper document. They are standard, they look the same on every system, regardless of which fonts you have installed, and they are usually not something users can edit. But if you want to keep them safe, you need to know how to protect a PDF with a password.
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Fortunately, PDF & # 39; s support password-protected encryption that is built directly into the format. Whether you use Windows or MacOS, there are a few different methods to password-protect a PDF and this guide will take you step by step.
If you are more interested in making changes to your PDF, we also have a great list of the best PDF editors, as well as a guide for merging PDF & # 39; s.
Password protection of a PDF with Adobe Acrobat
Click on the button Sign-up at the bottom of the button the forms. The download starts from there.
Step 2: If you have not yet installed Adobe Acrobat Reader, you must install the DC Pro version. Otherwise it will easily upgrade what you have already installed to the enthusiast version. If you are asked if you want to buy or just continue with your trial period, choose the option to continue.
Step 3: After starting Adobe Acrobat Pro DC, make sure that you are logged in with the link in the top right corner. Then click on the menu File in the top left corner and select Open . Choose the PDF file that you want to protect with a password from the respective storage location and click the Open button.
Step 4: Click on the menu again File when viewing the open document, followed by Properties and then click on the Security .
Step 5: Click on the drop-down menu next to Security method, and then select Password protection from the list of options.
Step 6: A window appears asking for a password. Check the box next to Require a password to open the document and enter the desired password in the corresponding text field.
If you send this password to others, it is probably best to choose one that you do not use for other services – which is generally good advice. Recent versions of Adobe will even judge how hard your password will be to guess, so try choosing a password that gets a strong rating. Preferably one that contains a combination of lowercase, uppercase and numbers.
If you are concerned about forgetting this password, you can always use a password manager.
Restrict edits and printing with Adobe Acrobat
Protecting a password from a PDF document is not necessarily a comprehensive way. With the menu Document protection of Adobe Acrobat DC you can, for example, protect certain tasks such as editing and printing with a password. Here's how to do that exactly.
Step 1: Open the PDF document as you normally would and open the security panel as previously described.  Step 2: Select Change settings to access the menu Password protection . Hence the box next to Restrict editing and printing and enter a password in the box to the right of Change permissions Password .
Here is an overview of the available editing restrictions.
- Insert, delete, and rotate pages: Allows the person with access to the document to remove parts of the document, add pages, and turn the pages.
- Post comments, fill in form fields and sign existing signature fields : Allows the person to leave comments on the document, fill in sections with boxes to add text, and electronically sign the document.
- All operations except extracting pages & # 39; s: This allows others to make necessary changes to the document, except for shortening.
That's it! Now your PDF is password protected. When opened, this password prompt appears automatically.
Protecting a password with a PDF with PDFMate
Not everyone wants to deposit a healthy part of their salary every time they want a password to protect a document. Fortunately, there are alternatives to Adobe's premium suite, as long as you don't mind opting for a third-party tool with bare functions and aesthetics of design.
Once installed, PDFMate Free PDF Merger allows you to combine specific pages and encrypt entire documents without the lavish price tag. This allows you to set authorization passwords in a similar way to Adobe Acrobat and Reader, which means that you can set specific access codes for tasks such as editing, copying and printing – although the interface is much less attractive.
Step 1: Go to the PDFMate Free PDF Merger website, click on the green button Free Download at the top of the page and follow the installation instructions on the screen. Start the application when it is complete.
Step 2: Click the Add Files button with the addition sign in the upper-left corner and double-click the PDF document that you want to protect your password.
Step 3: Your PDF will automatically appear in the list of files. Select the check box next to Open password and enter your password in the corresponding text field. You can also check the box next to Permission Password which allows you to enable password protection for editing, copying and printing by checking the appropriate tasks below.
Step 4 : Select Build in the lower right corner of the application window when you have finished adding your password. Then a folder will automatically be opened with your new password-protected PDF. Presto!
Password Protecting a PDF in MacOS
Your Mac comes with Preview, a piece of software that can open most documents and image formats. It also offers some basic editing options, which is why we have called it the hidden Paint app on every Mac. It appears that the same program can encode any PDF in just a few steps.
Step 1: Start Preview Click on the menu File in the upper left corner and select Open . Then choose the PDF file that you want to protect with a password from the respective storage location and click on the Open button.
Step 2: Once you have finished editing the PDF document that you want to protect with a password, click again on the menu File and select Export from the drop-down menu. Then give a name and select a storage location for the resulting file, check the box immediately to the left of Encrypt and enter your desired password in the space provided. Check your password if prompted.
Step 3: Open your newly modified PDF in Preview to ensure that your PDF is protected. A password prompt screen will appear indicating that your PDF document is password protected. Then enter the correct password and enjoy the privacy of your new PDF!