PDF Editing Issues

How to Create and Use a Dynamic Stamp in Adobe Acrobat

John Wilson Oct 23, 2026 869 views

Question details

The user needs to create dynamic stamps containing editable form fields for variable information like invoice numbers, dates, and names.

How to Create and Use a Dynamic Stamp in Adobe Acrobat

Product: Adobe Acrobat
Device & OS: not provided
Scenario: Adding custom stamps to PDF documents that require the user to input specific variable data at the time of stamping.
Observed behavior: Adding standard form fields using the Prepare Form tool does not automatically make those fields editable when the document is used as a custom stamp.

Before you start

Ensure you are using Adobe Acrobat Pro, as Acrobat Reader does not support the advanced custom JavaScript authoring required to configure dynamic stamp workflows.

Solution 1Recommended

Configure the Dynamic Stamp Workflow with Custom JavaScript

Use Adobe Acrobat's custom stamp creator and apply specialized JavaScript to form fields so they prompt for data entry when stamped.

A standard PDF form placed inside a stamp will not allow data entry by default. To make a stamp truly dynamic, you must configure the stamp's JavaScript and field names correctly using Acrobat's dynamic stamp workflow.

When properly set up, the embedded JavaScript triggers a popup dialog box requesting the required information (like an invoice number) exactly when the stamp is placed on the page.

Create the visual stamp

Design the static background of your stamp in a program like Word or Illustrator, and save it as a PDF file.

Import as a Custom Stamp

Open Adobe Acrobat, navigate to Tools > Stamp > Custom Stamps, and click Create. Browse to your saved PDF to import it, then assign it to a specific category and give it a name.

Locate the background stamp file

Acrobat generates a background file for your stamp. Navigate to your user AppData folder (usually under AppData\Roaming\Adobe\Acrobat\[Version]\Stamps on Windows) and open the newly generated PDF file.

Add form fields

With the stamp file open, click Tools > Prepare Form. Add text fields where you want the dynamic data (like dates or names) to appear.

Apply Custom JavaScript

Right-click the text field, select Properties, and go to the Calculate tab. Select 'Custom calculation script', click Edit, and paste the required JavaScript (e.g., using app.response to prompt the user) to capture and display the input.

Configure the Dynamic Stamp Workflow with Custom JavaScript

Follow Naming Conventions: Review Adobe Acrobat Users' dynamic stamp guidance for exact JavaScript syntax and required field naming conventions, as incorrect script formatting will prevent the input prompt from appearing.

WPS PDF Editor

Easily Add Custom Stamps and Edit PDFs with WPS Office

If configuring complex JavaScript for dynamic stamps in Acrobat feels too technical, WPS PDF offers a highly intuitive alternative. You can easily apply custom image stamps, insert dates, and fully edit PDF text without any programming knowledge.

1. Open your document: Launch WPS Office and open the PDF file you need to review or stamp.
2. Access the Stamp tool: Navigate to the Comment tab on the top ribbon and click on the Stamp icon.
3. Add a custom stamp: Select 'Click to Add Custom Stamp' to upload your own design, signature, or company seal.
4. Insert variable text: Place the stamp on your document, then use the Edit tab to quickly insert a Text Box over or near the stamp to manually type your invoice number or date.

User-friendly interface for adding custom image and text stamps to any documentEasily insert text boxes to manually type variable data like dates and invoice numbersHigh compatibility with standard PDF formats generated by Adobe AcrobatLightweight and free PDF editing tools for Windows, Mac, and mobile devices

microsoft office alternative - wps office

Frequently Asked Questions

Why aren't my form fields editable after creating a custom stamp in Acrobat?

A standard PDF form placed inside a stamp will not allow data entry by default. The stamp flattening process disables standard form interactivity. You must use Acrobat's specific dynamic stamp workflow and custom calculation JavaScript to trigger a prompt dialog when the stamp is placed.

Where does Adobe Acrobat save my custom stamp files on Windows?

Acrobat typically saves custom stamp files in your user directory. You can find them by navigating to C:\Users\[YourUsername]\AppData\Roaming\Adobe\Acrobat\[Version]\Stamps. You will need to open the PDF in this folder to add your JavaScript form fields.

Can I add a dynamic date to an Acrobat stamp without writing JavaScript?

No, Adobe Acrobat requires JavaScript to make a stamp truly dynamic. To pull the current system date automatically, you must add a small snippet of JavaScript code to the calculation properties of the stamp's text field.

Is there an easier way to add custom images and text to a PDF?

Yes, if you do not need automated popup prompts, you can use user-friendly PDF editors like WPS PDF. WPS allows you to quickly insert custom image stamps and place editable text boxes for dates or names alongside them without touching any code.

PDF Troubleshooting