PDF Editing Issues

How to Sign and Complete PDF Forms on Android using Adobe Acrobat

Huma Ashraf Ch Oct 19, 2026 868 views

Question details

The user needs to know how to fill out form fields and apply an electronic certificate or signature to a PDF document using an Android device.

How to Sign and Complete a PDF Form on Android

Product: Adobe Acrobat Reader
Device & OS: Android
Scenario: Completing a PDF document that contains interactive data fields or requires adding text, checkmarks, and signatures while working on a mobile device.
Observed behavior: Successfully inputting data into Acroforms and utilizing Fill & Sign tools to complete and sign the document on a mobile platform without structural editing capabilities.

Before you start

Ensure you have the latest version of your PDF reader installed from the Google Play Store and that the PDF document you need to sign is not password-protected against modifications.

Solution 1Recommended

Complete and Sign Forms using Adobe Acrobat Reader

Utilize the built-in Acroforms and Fill & Sign features in Adobe Acrobat Reader for Android to successfully fill in data and apply your signature.

The Acrobat Reader mobile app supports two main form types. Acroforms allow you to directly enter data and check boxes within predefined fields. The Fill & Sign feature allows you to place text, checkmarks, and signatures on documents that lack interactive fields.

While you can easily fill in Acroform fields on your Android device, you cannot edit the structure or remove these fields without using a desktop editor.

Open the PDF document

Launch the Adobe Acrobat Reader app on your Android device and navigate to the files tab to open the PDF form you wish to complete.

Fill interactive Acroform fields

If the document contains interactive fields, simply tap directly on the highlighted boxes to type in your data or select checkboxes.

Use the Fill & Sign tool

For forms without predefined interactive fields, tap the 'Tools' menu and select 'Fill & Sign'. Select a form element (such as text, a checkmark, or a signature) from the toolbar.

Place elements and save

Tap anywhere on the PDF document to place your selected element. Once all information and signatures are added, tap the checkmark icon in the top corner to save your completed form.

Complete and Sign Forms using Adobe Acrobat Reader

Mobile Editing Limitations: You cannot change the size, position, or properties of existing Acroform fields on a mobile device; you can only input data into them.

Powerful PDF Editor for Mobile

Easily Fill and Sign PDFs on Android with WPS Office

WPS Office features a robust and user-friendly mobile PDF editor that allows you to seamlessly fill out forms, add electronic signatures, and annotate documents directly from your Android smartphone or tablet.

1. Open your PDF in WPS Office: Launch the WPS Office app on your Android device and open the PDF file you need to sign.
2. Access the PDF Edit tools: Tap on the 'Tools' icon at the bottom of the screen and navigate to the 'PDF Edit' or 'Annotation' tab depending on your needs.
3. Fill and add your signature: Use the 'Fill & Sign' option to type text into blank areas, or tap 'Signature' to draw and place your electronic signature exactly where it belongs.
4. Save and share the completed form: Tap the 'Save' icon to finalize your document, then share the signed PDF securely directly from the WPS interface.

Seamlessly fill out standard PDF forms on your mobile device without any hassle.Create and insert secure electronic signatures with just a few taps.Fully compatible with standard Adobe PDF formats, forms, and annotations.Lightweight, all-in-one free office suite that handles Word, Excel, PowerPoint, and PDF files.

microsoft office alternative - wps office

Frequently Asked Questions

Can I edit the actual form fields on my Android phone?

No, while you can fill out data in interactive Acroform fields on a mobile device, you cannot edit, move, or remove the fields themselves. Modifying the form's layout requires a desktop PDF editor.

Why am I unable to type directly into my PDF document?

If the PDF doesn't have built-in interactive Acroform fields, you won't be able to type directly into it by simply tapping. Instead, you must use the 'Fill & Sign' tool to manually overlay text boxes onto the blank lines.

Are electronic signatures added via Android apps legally binding?

In most jurisdictions, electronic signatures applied via standard PDF applications like Adobe Acrobat or WPS Office are legally binding for general personal and business transactions, though specific highly-regulated industries may have stricter certificate requirements.

How do I ensure my signature cannot be altered after sending?

After applying your signature, it is recommended to save a flattened copy of the document or share the final saved version as a read-only file. This embeds the signature into the document layout, preventing easy alterations.

PDF Troubleshooting