Free Online PDF Unlocker

Instantly unlock any encrypted PDF document online. No downloads required.
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How It Works?

Upload a PDF

Unlock any PDF by uploading it to our platform. Choose an encrypted document on your computer or cloud storage, or just drag and drop it into the box.

Remove All Restrictions

Unlock a protected PDF in one click. Once the document is uploaded, click the ‘Unlock PDF’ button and remove all restrictions.

Use it for Free

Our app allows you to unlock your PDF documents without having to download any expensive software. Save time and money using AltoUnlockPDF.

Secure Data Transfer

Rest assured that we keep your files private and delete them from the server once they’ve been unlocked and downloaded.

Unlock PDFs on Any Device

AltoUnlockPDF runs on any Internet-connected desktop or mobile device. Our web-based app is compatible with Windows, Mac OS and Android.

Process Files in the Cloud

The app doesn’t take up any free space on your hard drive. Quickly unlock any encrypted PDF online even while on the go.

Characteristics

File extension .png
Internet media type image/png
Description: PNG pronounced ping is a format for storing bitmapped (raster) images on computers. It was created originally to replace the GIF file format when it was announced that the companies who created the GIF format wanted royalties. PNG uses indexed colors and lossless compression (like a .GIF file), but without those copyright limitations; it cannot be animated like a GIF image.
Technical Details: PNG images are in many ways better than .GIF as they also include an 8-bit transparency channel, which allows the colors in the image to fade from opaque to transparent; GIF images only support fully opaque or fully transparent pixels. PNG supports palettes of 24-bit RGB colors, RGB images or greyscale or RGB images. PNG was intended to be able to transfer images on the Internet, not professional graphics, and so does not support other colour spaces (such as CMYK).
Developed by PNG Development Group (donated to W3C)
MIME Type: application/pdf
Useful links: Further information on PNG Files. How can I open a PNG file?

Customer Questions and Answers

Question:
How Users Rate AltoMerge?
Answer:
There is no need to buy expensive software in order to combine your files. AltoMerge is completely free. Rearrange, delete or stop upload process of documents. You can add more documents if needed.
By Zombri on November 27, 2017
Question:
How Users Rate AltoMerge?
Answer:
There is no need to buy expensive software in order to combine your files. AltoMerge is completely free. Rearrange, delete or stop upload process of documents. You can add more documents if needed.
By Zombri on November 29, 2017
Question:
How Users Rate AltoMerge?
Answer:
There is no need to buy expensive software in order to combine your files. AltoMerge is completely free. Rearrange, delete or stop upload process of documents. You can add more documents if needed.
By Zombri on November 30, 2017
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How Do Users Rate AltoUnlock?

Our service faciliates the work of over two million people editting PDF documents online every year.

4.5
1,356Votes

How to Unlock PDF Document?

If a PDF document is password protected, you’ll have to enter the password each time you want to view the document. Password protecting a document is necessary for many reasons. For controlling access to the information specified in the document. Say, for example, your file is on a publicly-accessible source but contains confidential data that only certain individuals should have access to. In this case, you share the password you have specified for the document with a limited number of people. Another reason could be that establishing limited access to the document means protecting it from any possible changes. If you’re sending a contract to your stakeholders, you’ll want it to be printed and signed but not altered. You can let your partner peruse the document and be sure that it remains in its original form. One more case is locking forms that are used for filling via a link. Any user may accidentally or deliberately alter a form if it’s not locked.

Although locking files is definitely considered to be very useful, what are you going to do if something changes? You want to provide access to your document’s content and coding is no longer needed. Specifying a password is now one more unnecessary step. Accessing PDFs in a secure location is inconvenient. It goes without saying, that protected files are unavailable for editing or formatting. The solution is simple: just remove the password-protection. Now you have the ability to use a powerful brand new tool to unlock PDF files.

How to guide: How to unlock a PDF online

  1. Open AltoUnlock in your web browser.
  2. Within the app, click Choose File and upload a PDF or simply drag-and-drop it into the box.
  3. Import a document stored online by clicking one of the cloud storage service icons below.
  4. Wait for the upload to finish.
  5. Create a password for your PDF, then click Unlock Now! Your unlocked file will be ready in seconds.
  6. Choose what else you’d like to do with the resulting PDF.
  7. Click Work on your PDF to edit it online (i.e. redact, sign, or share it with another user).
  8. Click Download Now to save the PDF file to your computer or phone.

Get the Freedom to Access a PDF In Seconds.

AltoUnlockPDF gives you the ability to remove password-protection in a few clicks. Use any internet connected device to instantly upload a PDF to the server. To avoid the useless jumble of words and expressions, here is a list of the main features of this service:

  • This service runs in a browser, so it is equally convenient to unlock PDF on Mac OS, on Windows or Linux. It doesn’t matter whether you use a desktop or smartphone.
  • AltoUnlockPDF is a web-based program, that doesn’t require any additional software to download or install. Space on your hard drive will remain free.
  • All tools you need to manage your documents exist on cloud storage and are available anytime and anywhere. Use your smartphone or tablet. Working while on-the-go is the new normal.
  • All documents uploaded to the server are highly protected. Safety is important and that means keeping all your information private. All files are deleted once they’ve been unlocked and downloaded.
  • AltoUnlockPDF lets you forget about downloading expensive software. The service saves you time and money and provides its users the ability to complete all operations for free.

Get Started Right Now

To begin unlocking and editing PDF contracts, agreements, invoices, medical or tax forms, follow these steps:

  1. Select a password-protected document on your computer or cloud storage. Drag and drop it into the box and click the orange button to start the process.
  2. Enter the password.
  3. When you’ve finished, download your document which is no longer locked.

If you’ve unlocked PDF file for editing, open your PDF editor and click anywhere on the document to start adding text. Change the font, size and color of your text to your preference.