---
title: "Alternating Case action for ActionClip"
canonical_url: "https://actionclip.app/actions/alternating-case"
document_type: "standalone_action"
official: true
action_count: 1
catalog_schema_version: 1
catalog_revision: "2026-09-04.1"
catalog_published_at: "2026-09-04T10:30:00Z"
---

# Alternating Case action for ActionClip

Switch letters between uppercase and lowercase.

## What it does

Switch letters between uppercase and lowercase. It runs locally and handles the selected text without contacting a service.

## Action details

| Field | Value |
| --- | --- |
| Category | Text Editing & Formatting |
| Action type | JavaScript |
| Default result | Replace selected text by default |
| Internet | Not required |

## Action and outcome

| Action | Outcome |
| --- | --- |
| **Alternating Case** — Selected text: Action Clip | AcTiOn ClIp |

## How to switch letters between uppercase and lowercase with ActionClip

1. Select the text you want to use.
2. Choose **Alternating Case** from ActionClip.
3. In editable text, ActionClip replaces the selection immediately. In read-only text, it opens the result for review and copying.

## Requirements

No setup required.

## Privacy

Runs locally in ActionClip’s JavaScript sandbox. Selected text does not leave your Mac.

## Action script

````javascript
function run(selected_text) {
  var upper = true;
  return Array.from(selected_text.toLocaleLowerCase()).map(function (character) {
    if (!/\p{L}/u.test(character)) return character;
    var result = upper ? character.toLocaleUpperCase() : character;
    upper = !upper;
    return result;
  }).join("");
}
````

## Links

- [HTML listing](https://actionclip.app/actions/alternating-case)
- [Download action definition](https://actionclip.app/actions/alternating-case.actionclip)
- [Browse Text Editing & Formatting actions](https://actionclip.app/marketplace#marketplace-textTools)
- [All Marketplace listings](https://actionclip.app/marketplace)