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Securely Sign PDF on Android: Efficiency at Your Fingertips

Are you stuck in a situation where you must sign a pdf document? Are you looking for a trustworthy app to sign PDFs on Android?

Sometimes, we are stuck in a situation where there's no way around - and you have to use an app to sign your PDFs on the go. You need to have a third-party application that is easy to use so that next time, you don't have to rush to your office to sign official documents.

Don't worry! This article aims to show you how to sign PDF on Android using UPDF for Android - a trusted and easy-to-use app. Let's get straight into it!

Part 1: How to Sign a PDF on Android

Do you want to learn how to sign your PDF documents on the go? We understand it is not always possible to stay in the office to sign the documents.

Luckily, it is easy to sign the documents using the UPDF for Android application.

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Introducing UPDF, your go-to Android application to sign your PDF files in just a few touches. With the help of its annotation feature, you can now add your legal signatures to your official files.

Step-by-Step Guide to Using UPDF for Android to Sign PDF:

UPDF is one of the most convenient tools to not only sign PDF files but also it is an effective tool to edit, manage, and organize PDF files. Using the UPDF Android tool is a straightforward process. All you have to do is to follow these simple steps, and you are all done!

UPDF gives you two options to sign your PDF files on Android. Whether in the office or not, you can sign your files effortlessly using the UPDF tool.

Method 1: Use "Pencil" to Write the Signature on a PDF

Adding a signature using "Pencil" on the UPDF Android app is as simple as 1-2-3. Have a look:

Step 1: Open the PDF File

Open the UPDF app on your Android phone and open the desired PDF file where you wish to add the signature.

Step 2: Enter "Edit Comment" Mode

Once you have opened the PDF file, locate the "Edit Comment" option and click it in order to have access to edit the PDF file on your phone. Once you enter this section, pick "Pencil" to add your signature.

Step 3: Add Signature on Android use Pencil

Now you have selected the "Pencil," you can easily draw your signature in the PDF file. Moreover, you can also adjust the thickness and color of your pencil.

Method 2:  Add Signature Picture to PDF

You can add signature pictures to PDF files using the UPDF for Android tool. Follow these simple steps:

Step 1: Open the PDF File

Open the UPDF for Android application and the targeted PDF file to add the signature.

Step 2: Go to "Edit" Mode

Once you have opened the PDF file, enter the "Edit" mode to add the image of your signature.

Step 3: Import the Signature Image

After entering the Edit mode, tap the tiny picture icon to import your signature picture from your Camera, Album, or Files.

Part 2: How to Sign PDF with Adobe on Android

Another popular tool to edit and manage PDF documents is Adobe Acrobat. Using various options, you can play around with this tool to sign your PDF files. You can either add your signature using the "Add Signature" option or simply write your initials as your signature.

Moreover, you can also draw your signatures to add an artistic touch. And this tool also offers various other options to modify the signature's color and style.

Use the following steps to add the signature to the PDF file in Adobe:

Step 1: Tap on the "Files"

Open the Adobe tool and locate the "files" icon at the bottom of your screen to access your phone's saved PDF files. Tap "Files" and import files from your Gmail or Google Drive.

Step 2: Import the PDF File

Import your desired PDF file to Adobe, and open it. Once you open the file, tap the option "Fill & Sign" from the lower panel on your Android screen.

Step 3: Add Signature

Now, look for the signature icon at the lower right corner of your screen (a nib-like sign) and choose "Add signature" or "Add initials" as per your choice.

Part 3: Which One is the Best PDF Signer on Android

With so many PDF signer applications available, choosing the right one depends on how easy it is. Adobe Acrobat is one of the most famous tools available, serving its users for many users.

However, the tool lacks simplicity, making it complicated for users to stick to it for the longer term. As people these days look for effective yet simple options to sign PDF on Android; therefore, many of them are switching to UPDF.

Comparison Between Adobe Acrobat and UPDF

Adobe Acrobat serves its users with two versions: its Standard version, and the Pro version. The following chart compares the features and prices of UPDF, Adobe Acrobat Standard, and Adobe Acrobat Pro versions.

Adobe Acrobat Standard DCAdobe Acrobat Pro DCUPDF
SystemsWindows OnlyWindows, Mac, Android, iOSWindows, Mac, iOS, Android
Adding ImageYesYesYes
Sign ElectronicallyYesYesYes

UPDF for Android is a feature-rich PDF reader and organizer that provides a beautiful and intuitive user interface, allowing you to manage PDF documents on your Android devices. With its versatile set of tools and functionalities, UPDF offers numerous benefits for users:

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Key Benefits of UPDF for Android:

  • PDF Management: UPDF allows users to perform various document management tasks effortlessly. You can copy, move, duplicate, rename, print, delete, compress, email, and share PDFs with ease.
  • PDF Editing: The app's text editing feature makes it remarkably simple to modify content within PDFs. Whether you need to correct a typo or update information, UPDF for Android simplifies the editing process.
  • Extensive Annotation Tools: UPDF provides a wide array of annotation tools, including sticky notes, highlights, strikethroughs, underlines, drawings, and customizable stamps and stickers. These tools empower users to mark up and enhance PDFs, making collaboration and feedback efficient.
  • PDF Signing Made Easy: UPDF simplifies the process of adding legally binding signatures to your official documents. Its annotation feature allows you to sign PDFs effortlessly, making it an ideal tool for professionals on the go.
  • Split-Screen Support: With Split-Screen mode, UPDF enables multitasking, allowing you to work on PDFs side by side with other apps, enhancing productivity.

Part 4: FAQs about Signing PDF on Android

What Android App Can I Use to Sign PDF Documents?

Several Android apps exist that can be used to sign PDF documents. However, if you are looking for easy-to-use software that you can use to sign your PDF files in no time, then download the UPDF App right now.

It enables its users to organize, manage, and edit PDF files without obstacles. All you have to do is download the app and get started with its easy user interface.

Why Won't My PDF Allow Me to Add a Digital Signature?

Occasionally, PDF files may only allow digital editing and signatures. To do that, you can edit the permissions on your document and then add the digital signatures effortlessly.

How Do I Create a Handwritten Signature for a PDF on Android?

With the help of the UPDF app, you can easily add your handwritten signature. First, create your handwritten signature using finger. Once you've created the signature, use this tool to add it to your PDF documents.

How Can I Sign a PDF for Free on Android?

Actually, there is no completely free PDF signer in the marker. If you want to sign, edit, manage, and organize PDF files in a snap, you can download the UPDF tool for a free trail. Using it is easy and offers a good user experience.


In conclusion, signing PDF documents on Android has never been easier thanks to the user-friendly and feature-rich UPDF app. Whether you need to add a legally binding signature to an official document or annotate and collaborate on PDFs, UPDF has you covered. Its efficient annotation tools, PDF editing capabilities, and seamless organization make it an indispensable tool for professionals on the go.

While other options like Adobe Acrobat exist, UPDF stands out for its simplicity, affordability, and cross-platform support. By choosing UPDF, you can streamline your workflow, go paperless, and manage your PDFs effortlessly. So why wait? Download UPDF now and take control of your PDF documents with efficiency at your fingertips.

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