Free Online PDF Unlocker

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File extension .pdf
Internet media type application/pdf
Description: PDF stands for Portable Document Format and uses the .pdf file extension. It was invented by Adobe in 1993. For many years it has been one of the most commonly used file formats. The main aim of the PDF is to send important information to another person quickly and easily. PDFs can combine text and multimedia within one document, they work with nearly all hardware and operating systems.


Technical Details: PDF is a 7-bit ASCII file with a fixed layout. PDF uses the PostScript language, which makes it possible to display a range of text fonts, graphics and other media in a single, universal file. Some PDF documents have an encryption feature that will keep them from being read until whoever is opening the document provides a password.
Developed by ISO
Initial Release: 15 June 1993
Useful links:

Unlock PDF files in seconds with a secure tool

Follow the steps below to unlock a PDF online

Do you deal with a great number of confidential documents? Are they locked with a password for security? Typically, you have to enter a password every time you need to access a document. To save yourself the trouble of re-entering passwords, simply unlock a PDF file with our tool. It comes with AES-128 encryption and allows you to instantly and securely remove a document’s password in five simple steps. No account is needed. Here’s how to proceed. 

How to unlock a secured PDF

  1. Upload a file or drag-and-drop it into the highlighted area. 
  2. Enter its password to unlock the PDF
  3. Click on the eye icon to show or hide the password.
  4. Hit Unlock Now to proceed.
  5. Download the unlocked file by clicking the Download button.  

The PDF unlocker is not the only feature our solution has to offer. If you need to make any other changes to a document, you can do so by exploring the advanced toolset for creating, editing, optimizing, signing, and annotating documents in one place. It also allows you to create fillable forms and templatize frequently used documents. With our tool, you get a one-stop solution for your daily PDF tasks.

Get a video walkthrough on how to unlock a PDF

Learn how to easily remove a password from a protected document with our PDF remover feature and access files in a more timely and convenient way. There’s no need to create an account or provide your email address.

The Ultimate Features Comparison Chart

There are hundreds of solutions on the internet that specialize in online document management. Check out the comparison table below to find out why millions of users choose AltoUnlockPDF.

View & edit
Split PDF βœ” βœ” βœ”
Merge PDF βœ” βœ” βœ”
Combine & Reorder βœ” ❌ ❌
Extract Pages βœ” ❌ ❌
Compress PDF βœ” βœ” ❌
Rotate PDF βœ” βœ” ❌
No software downloads βœ” βœ” ❌
Cloud storage Unlimited No info No info
Price Free Free 7-Day Trial paid Free 7-Day Trial paid
Encryption and security βœ” βœ” βœ”
Support 24/7/365 No info βœ”
No ads βœ” βœ” βœ”

Customer Reviews β€” Trusted by great people

⭐ ⭐ ⭐️ ⭐️️ ⭐️

The best time-saver ever! I receive tons of emails with documents and Altounlocker easily removes all the restrictions from them, so I can edit the files the way I need to.



⭐ ⭐ ⭐️ ⭐️️ ⭐️

I like everything about AltoPDF and its unlocker tool is no exception. I don’t like lots of apps on my phone, which makes AltoPDF’s free online version perfect for me.



⭐ ⭐ ⭐️ ⭐️️ ⭐️

Such a great solution! It removes encryption from docs and at the same time protects me as the owner of the file. All I need is my device and Internet connection!



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How To Unlock PDF Document

Decrypt PDFs with less effort deploying our versatile and full-featured tool. It will make the process effortless and bring you instant high-quality results.

How to Remove a Password from PDF Files Online

One of the fastest ways to unlock a document is by doing so via an online service.

This is actually an advantage since you do not need to install software, register or even pay for registration. Such services are easily accessible from this browser on any internet-connected device.

It may be the template you locked yourself for the purpose of sharing by email or you might have a file from a third party. Regardless, although some websites offer files in PDF format, they are not always available for preview. What usually happens is when one downloads it for a set price, the owner needs to provide a set password to it. 

There are step-by-step instructions for processing your files:

  1. Open the web service in your browser.
  2. Add documents from your device or cloud storage.
  3. Wait until the file uploads and add a password in the corresponding area.
  4. To avoid mistypes, click on the eye icon and then symbols will be visible. This way you will be sure that everything is in proper order.
  5. Click on Unlock Now and save the document.

The locked document can come from your friend, co-worker or any other person. Anyway, do not forget to ask them to provide you with a password, otherwise, there will be no way to read or edit it. With our service, all restrictions can be easily removed from a document and you will be able to edit or rearrange the pages. The interface of our service is easy to use and any new user can process documents with it in just minutes.

BackgroundHow to Remove a Password from PDF Files Online

How to Remove a Password From PDF files with Google Π‘hrome

Google Chrome is a powerful editor, that can easily be installed on every device. Thanks to its multi-platforming and the wide variety of additional functions in combination with extensions, it is an extremely useful and dynamic browser. Any user can customize it according to personal needs, adding a specific background, selecting the style of font and adding personalized extensions for any purpose. For example, the Alto Unlock for Chrome is a perfect free tool when it comes to unlocking documents. Here is how you can process documents with this extension:

  1. Add Alto Unlock to the browser using Web store.
  2. Open the extension and add the document from the preferrable type of storage.
  3. Remove protection from the document by inserting its password.
  4. Save the unlocked PDF.

The Alto Unlock extension for Chrome is very useful for those who use the unlocking function rarely and often. It is simple in installation and use, enriching the browser with one more feature, available at any time. It takes no device’s memory, as extension integrates with Chrome, not in the device. The solution unlocks any file in half of a minute and decrypts it making available all information the file contains. It will be available for review, editing and sharing with other users.

BackgroundHow to Remove a Password From PDF files with Google Π‘hrome

How to Unlock PDF Files with Windows

Unfortunately, Windows itself does not have pre-installed tools to remove protection from templates. To do so, a user needs to install software containing a password removing option. Also, it’s possible to use an online-based service and process the template with it. You can select either a paid or free solution. It might have numerous functions or concentrate on one specific function only. It’s up to you whether to choose a paid or unpaid option. Here’s an example of how you can edit a template using Acrobat Pro installed on a Windows computer:

  1. Open the document in the software.
  2. Go to Permission Details and choose Security.
  3. Remove the password.
  4. Save the document to the preferable folder and it will be available for editing.

PDFs are very widespread among Windows users, almost the same as Word documents. That’s why everyone should decide what service to use for editing, signing, rearranging pages, locking and unlocking. Because once you decide it, it will be easier to process your files and you will not need to search again for the appropriate solution. Those who are used to working without an internet-connection should install special software. People who are often online can select cloud-based services.

BackgroundHow to Unlock PDF Files with Windows

How To Unlock PDF Files With Preview on Mac

All computers and laptops on the Mac operating system have the preview option for PDFs. It was developed so users wouldn’t have to purchase or install additional software. 

And in this instance, there is no need to use online apps. One can simply read the document’s content, rearrange its pages or combine several templates in one. It's also easy to remove protection from the template. But you need to know the correct password.

The instructions for removing a password are given below:

  1. Right-click on the needed document.
  2. Select Open with and choose Preview out of the list of available programs.
  3. Next, you will see a new window and a lock, followed by an input field. 
  4. Insert the needed combination and your sample will open.
  5. Click on File and save the document as password-free.

Do not forget to include a folder for saving the sample. It will be stored in the directory you have chosen. This tool helps you easily unlock files anytime, even if there is no internet connection available. Your file will be available for making changes, signing and page rearrangement. The document can also be easily shared with any user and you will not need to remove its security features again.  

BackgroundHow To Unlock PDF Files With Preview on Mac

How To Remove a Password From PDF Files with Adobe Reader

Adobe software is already relatively widespread. This is largely due to the fact that they originally created what is known as PDF format. This application is developed for different devices. The free mobile version of the Acrobat Reader unlocks password-protected files. The desktop software has this feature only in the paid version. It's just easier to install the mobile app for free and unlock files with it.

Acrobat is good for those who work with PDFs on a regular basis and have enough memory in their devices to work with this solution. To unlock a document with this application, follow the steps given below:

  1. Install the application to your device and register.
  2. Import the encrypted file.
  3. Go to Permission Details and the pop-up window will appear.
  4. Open the Security tab and remove the password.
  5. Save the PDF document and it will be available for editing.

As you can see, those who installed the Pro version of Acrobat can easily update security settings and unlock their PDF documents in a few minutes. This is ideal if you can't get connected to the internet. You can then edit the document and add your signature to it. It's also possible to delete or rearrange template pages. Finally, share the sample with other users by attaching it to an email. 

BackgroundHow To Remove a Password From PDF Files with Adobe Reader


Can I unlock files with PDF Password Remover Portable?

You can download the Password Remover Portable to use it for unencrypting the file instantly. If you are looking for a one-off solution, and don’t want to pay for software, use to deal with your documents. Go online, load the files to Alto and convert once it’s convenient for you.