> For the complete documentation index, see [llms.txt](https://docs.inputflow.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.inputflow.com/form-editor/validation-and-error-messages.md).

# Validation & Error messages

Inputflow allows you two different input validation methods:

1. Required field validation, for very simple forms
2. Advanced validation with custom error messages

The following two videos, teach you exactly how to set these up:

### 1. Required field validation, for very simple forms

{% embed url="<https://youtu.be/6_tgAaIJSRI>" %}

### 2. Advanced validation with custom error messages

{% embed url="<https://youtu.be/tRvO3r4q1EA>" fullWidth="false" %}