> For the complete documentation index, see [llms.txt](https://docs.onum.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.onum.com/pipelines/actions/transformation/field-transformation/field-transformation-operations/utils/to-upper-case.md).

# To upper case

## Description

This operation converts all characters in a string or text to their uppercase equivalents.

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## Data types

These are the input/output expected data types for this operation:

### Input data

`String` - Strings to be converted.

### Output data

`String` - Strings where all lowercase letters (`a-z`) have been converted to their uppercase counterparts (`A-Z`).

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## Example

Suppose you want to **convert** all the characters of a series of strings in your input data **to uppercase**:

1. In your Pipeline, open the required [Action](/pipelines/actions.md) configuration and select the input **Field**.
2. In the **Operation** field, choose **To upper case**.
3. Give your **Output field** a name and click **Save**. The characters in your input strings will be converted to uppercase.

For example:

{% code overflow="wrap" %}

```
Hello World! -> HELLO WORLD!
```

{% endcode %}

{% hint style="info" %}
You can try out operations with specific values using the **Input** field above the operation. You can enter the value in the example above and check the result in the **Output** field.
{% endhint %}