> For the complete documentation index, see [llms.txt](https://docs.myshell.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.myshell.ai/create/pro-config-mode/advanced/advanced-input-validation.md).

# Advanced Input Validation

## Input Field Validation Rules

You can enhance your input form by setting validation rules on input fields. These rules help ensure data integrity and improve user experience.

### Example: Increasing Character Limit

Some LLMs support up to 128K tokens. If you want to increase the character limit of your input message field from 1500 to 3000 characters, you can modify the configuration as follows:

```json
"input_message": {
  "type": "text",
  "user_input": true,
  "validations": {
    "required": false,
    "max_length": 3000
  }
}
```

### Available Validation Fields

| Name            | Type    | Applicable Input Types                | Description                                          |
| --------------- | ------- | ------------------------------------- | ---------------------------------------------------- |
| required        | boolean | Any                                   | Determines if the input field is mandatory for users |
| max\_number     | number  | integer, number                       | Sets the maximum numeric value users can input       |
| min\_number     | number  | integer, number                       | Sets the minimum numeric value users can input       |
| max\_length     | number  | text                                  | Limits the maximum length of the input string        |
| max\_file\_size | number  | image, text\_file, file, audio, video | Restricts the maximum file size for uploads          |


---

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