Modify signature in PDF on Smartphone phone

How to modify signature in PDF on Smartphone with DocHub

DocHub offers a seamless online platform for document management, allowing you to modify your PDF signatures conveniently from your smartphone. Whether you’re using a Samsung Galaxy S25 Ultra, Apple iPhone 15 Pro, Xiaomi Redmi 13, Vivo X Fold3, or Motorola Razr 40 (Razr 2023), our editor simplifies signing and editing your documents for free. With deep integration with Google Workspace, you can enjoy a smooth workflow and efficient document handling.

Follow the steps to modify your signature:

Open your favorite web browser and visit the DocHub website. Log in to your account using your credentials.
Once logged in, locate the PDF document you wish to modify. You can easily upload a new PDF or select one from your Google Drive.
After opening the document, navigate to the signature section. This area allows you to edit existing signatures or create a new one.
To modify your signature, select the option to edit it. You can draw your signature directly on the screen or upload a pre-saved image of your signature.
Once you are satisfied with your modifications, ensure to save your changes. You can then preview the document to check that the signature appears as intended.
Finally, download the updated PDF to your device, print it, or share it directly via email or link.

Start enhancing your document management experience today with DocHub!

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Editing a PDF is as simple as working in a Word document. You can add text, drawings, highlights, and redact or annotate your document without affecting its quality. No rasterized text or removed fields. Use an online PDF editor to get your perfect document in minutes.

Smooth teamwork

Collaborate on documents with your team using a desktop or mobile device. Let others view, edit, comment on, and sign your documents online. You can also make your form public and share its URL anywhere.

Automatic saving

Every change you make in a document is automatically saved to the cloud and synchronized across all devices in real-time. No need to send new versions of a document or worry about losing information.

Google integrations

DocHub integrates with Google Workspace so you can import, edit, and sign your documents directly from your Gmail, Google Drive, and Dropbox. When finished, export documents to Google Drive or import your Google Address Book and share the document with your contacts.

Powerful PDF tools on your mobile device

Keep your work flowing even when you're away from your computer. DocHub works on mobile just as easily as it does on desktop. Edit, annotate, and sign documents from the convenience of your smartphone or tablet. No need to install the app.

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Instantly share, email, and fax documents in a secure and compliant way. Set a password, place your documents in encrypted folders, and enable recipient authentication to control who accesses your documents. When completed, keep your documents secure in the cloud.

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How to modify signature in PDF on Smartphone

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To e-sign a PDF file, first download the SmallPDF Google extension from the Chrome Web Store. Once added, click on the extension in your Google extensions bar. Select the PDF file you want to sign and upload your signature file (saved on your computer) to add it to the document. Click "post" to save the signed PDF.

Got questions?

Here are some common questions from our customers that may provide you with the answer you're looking for. If you can't find an answer to your question, please don't hesitate to reach out to us.

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How do I edit a PDF on my smartphone?

Use docHub as your Android PDF editor. The Acrobat online tool helps you transform your PDF quickly and accurately, just how you want it. The Acrobat Pro tool offers more smart and searchable features along with a wider array of customizable options.

How do I rotate my signature in docHub fill and sign mobile?

0:56 1:29 How to rotate signature in docHub fill and sign using docHub YouTube Start of suggested clip End of suggested clip And find here edit PDF. Now select this signature. And edit this you can rotate or increase orMoreAnd find here edit PDF. Now select this signature. And edit this you can rotate or increase or decrease the size of signature. When you can rotate.

How do I add a signature in docHub Mobile App?

Create a signature Open a file that is not shared or password-protected. Tap Tap. Tap Create Signature or Create Initials and do one of the following: Tap Draw to hand draw a signature. Tap Image to choose an image on your device. Tap Camera to use your camera to capture an image of your signature. Tap Done.

How do I change my signature in docHub app?

Open the PDF document or form in Acrobat or Acrobat Reader, and select Fill Sign from the Quick action toolbar. From the signature dialog, select the cross (X) sign beside the previously added signature. Select the X sign. To add a replacement signature to the document, select Add Signature.

How do I change my signature in docHub Mobile?

Open a PDF in the docHub Reader mobile app, and tap anywhere in the PDF to open the menus if they are hidden. Tap and . If no signature has been previously stored on the device, select Add Signature, or to replace an existing signature, select the minus sign () next to the saved signature to remove it.

Why cant I edit a PDF after signature?

Resolution Open the PDF document in docHub. Select the Prepare Form tool. Select the form field(s) to unlock. Open the form field properties window. Uncheck Locked checkbox in bottom-left corner. Uncheck Read Only checkbox. Re-check Locked checkbox and select Close

Does docHub work on mobile?

Yes, Acrobat Sign mobile app is a free app for Android or iOS devices. The app lets you conduct complete business transactions on the go.

See why our customers choose DocHub

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"Simplicity, familiarity with the menu and user-friendly. It's easy to navigate, make changes and edit whatever you may need. Because it's used alongside Google, the document is always saved, so you don't have to worry about it."

Pam Driscoll F
Teacher

A Valuable Document Signer for Small Businesses.

"I love that DocHub is incredibly affordable and customizable. It truly does everything I need it to do, without a large price tag like some of its more well known competitors. I am able to send secure documents directly to me clients emails and via in real time when they are viewing and making alterations to a document."

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I can create refillable copies for the templates that I select and then I can publish those.

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Modify signature in PDF on Smartphone mobile device

How to modify signature in PDF on Smartphone with DocHub

Follow the steps to modify your signature:

PDF editing simplified with DocHub

Drive efficiency with the DocHub add-on for Google Workspace

How to modify signature in PDF on Smartphone