Convert to uppercase: upper

The upper filter converts all characters in a string to uppercase. This is useful when you need to display text in all capitals for emphasis, or when normalizing text for comparison purposes. For example, you might want to display a status message in uppercase on a dashboard, or convert a value to uppercase before comparing it against a known constant.

Usage

Here’s how to use this template function. Copy any example and adjust it to your setup.

{{ "hello world" | upper }}

HELLO WORLD

Function signature

The signature is a technical summary of this template function. It shows the name of the function, the values (called parameters) it accepts, and what type of data each parameter expects (for example, a piece of text or a number).

Function parameters that have a = with a value after them are optional. If you leave them out, the default value shown is used automatically. Function parameters without a default are required.

upper(
    value: str,
) -> str

Function parameters

The following parameters can be provided to this function.

Good to know

• Non-letter characters like digits and punctuation pass through unchanged.
• For case-insensitive comparisons, convert both sides with the same filter (upper or lower) rather than mixing them.

Try it yourself

Ready to test this? Open Developer tools > Template, paste the example into the Template editor, and watch the result update on the right. Edit the values to see how the function adapts to your own entitiesAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more].

More examples

Real scenarios where this function comes up in automations and templates. Copy any example and adapt it to your setup.

Display a status label in uppercase

Show a sensor state in all capitals for a prominent display.

{{ states("sensor.alarm_status") | upper }}

ARMED

Normalize text for comparison

Convert to uppercase to ensure a case-insensitive match.

{% if states("sensor.mode") | upper == "AUTO" %}
  System is in automatic mode
{% endif %}

System is in automatic mode

Still stuck?

The Home Assistant community is quick to help: join Discord for real-time chat, post on the community forum with your template and expected result, or share on our subreddit /r/homeassistant.

Related template functions

These functions work well alongside this one:

• Convert to lowercase: lower - Converts all characters in a string to lowercase.

• Capitalize first character: capitalize - Capitalizes the first character of a string and lowercases the rest.

• Convert to title case: title - Converts a string to title case, capitalizing the first letter of each word.