> ## Documentation Index
> Fetch the complete documentation index at: https://reportana.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# upper

### Introduction

The `upper` filter is used to convert all characters in a string to uppercase. This filter is useful when you want to standardize text in uppercase format.

### Example of Use

Example of how to use the `upper` filter to convert a string to uppercase:

```twig theme={null}
{{ 'Hello, World!'|upper }}
```

### Output Example of the Code

<img src="https://mintcdn.com/reportana/rrUbVfAgCraOJwnY/upper-en.png?fit=max&auto=format&n=rrUbVfAgCraOJwnY&q=85&s=0b421945fb76b3be213c3544da3a43f5" alt="Result of `upper` Filter" width="852" height="233" data-path="upper-en.png" />