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

# instagram.media.alt_text_max_graphemes

> Instagram alt text caps at 2200 graphemes — same as the caption.

## What it checks

`countGraphemes(item.altText) <= 2200`.

## Why 2200

Instagram doesn't publish a distinct alt-text cap in the Graph API; in practice the field accepts up to the same 2200-grapheme limit as the caption. We use the same number rather than guessing tighter.

## Failure response

```json theme={"system"}
{
  "error": {
    "code": "preflight_failed",
    "rule": "instagram.media.alt_text_max_graphemes",
    "platform": "instagram",
    "message": "Instagram alt text is capped at 2200 characters."
  }
}
```

## Remediation

Tighten the description.

## Related

* [`instagram.text.max_graphemes`](/preflight/instagram-text-max_graphemes)