How to Make Image to PDF app on Thunkable?

Converting images to PDF is a useful way to combine multiple images into a single document, making it easier to share and view. In this tutorial, we will show you how to create an image-to-PDF app for Android using Thunkable, a visual programming platform that allows you to create mobile apps without writing any code.

How to Make Image to PDF app on Thunkable?

Before you begin, you will need to sign up for a Thunkable account and create a new project.

Step 1: Add Components to the Design Interface

The first step is to add the necessary components to the design interface. These components include a button, an image component, and a file component. To add a component, simply drag and drop it onto the design interface.

Step 2: Link Your App to a PDF Conversion API

There are several PDF conversion APIs available, including the Adobe Document Cloud API and the Aspose.PDF API. In this tutorial, we will be using the Aspose.PDF API. To use this API, you will need to sign up for an API key. Once you have an API key, you can enter it into your Thunkable project by going to the “Connections” tab and clicking on the “API Key” component.

Step 3: Add Blocks to Handle the PDF Conversion Process

Next, you will need to add blocks to your project to handle the PDF conversion process. When the button is pressed, the image component should be passed to the PDF conversion API, and the resulting PDF should be saved to the file component.

To do this, you will need to use the “When Button1.Click” block, which is triggered when the button is clicked. Inside this block, you will need to use the “PDF.Convert Image” block, which passes the image to the PDF conversion API and returns the resulting PDF. Finally, you can use the “Save File” block to save the PDF to the file component.

Step 4: Test Your App

Once you have added all of the necessary blocks, you can test your app to ensure that it is working properly. To do this, simply click the “Test” button in the top menu. This will open a simulator where you can interact with your app as if it were running on a real device.

If everything is working as expected, you should be able to select an image, click the button, and see the resulting PDF saved to the file component. If there are any issues, you can use the debug tools in Thunkable to troubleshoot them.

Step 5: Export Your App

When you are satisfied with your app, you can export it to your Android device for further testing. To do this, click the “Export” button in the top menu and follow the prompts to export your app as an APK file. Once the export is complete, you can transfer the APK file to your device and install it like any other app.


In this tutorial, we have shown you how to create an image to PDF app for Android using Thunkable. With a PDF conversion API, you can easily convert images to PDF format, making it easier to share and view them. By following the steps outlined above, you can create your own image to PDF app and start exploring the many possibilities of PDF conversion technology.

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