> For the complete documentation index, see [llms.txt](https://help.littledata.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.littledata.io/event-editor/event-preview.md).

# Preview events

The event preview shows the exact payload Littledata will send to your destination, built from a real historical event from your shop. It reflects your current [field mappings](/event-editor/field-mappings.md) including unsaved changes, so you can verify a customization does what you intended before it touches production.

### Open the preview

{% stepper %}
{% step %}

#### Go to the Events tab

Open the [Events tab](/event-editor/getting-started.md) for the destination.
{% endstep %}

{% step %}

#### Edit the event

Click the **three-dot menu** on the event row and select **Edit**.
{% endstep %}

{% step %}

#### Go to Event preview

The preview loads a recent example of this event type from your shop, with all your mappings applied, saved or not.
{% endstep %}
{% endstepper %}

### Pretty and raw views

**Pretty** formats the payload for readability, best for scanning whether a field carries the value you expect.

<figure><img src="/files/TlV0repJlylLKVC4ZXSt" alt=""><figcaption></figcaption></figure>

**Raw** shows the exact JSON your destination will receive, best for checking structure, nesting, and exact key names.

<figure><img src="/files/48mx8AygHBFlEe3pr9X7" alt=""><figcaption></figcaption></figure>

### What to check

* **Your edited mappings return real values.** If a source path is wrong, you'll see it here as an empty or unexpected value instead of finding out in your destination's reports.
* **Custom parameters land under the right keys**, in the right section of the payload.
* **Metafields come through.** If you've mapped a [custom data source](/event-editor/custom-data-sources.md), confirm the value appears.

{% hint style="info" %}
The preview is built from a stored historical event, not a live one, so very recent changes on your store (like newly added metafield values) may not appear yet. [Trigger conditions](/event-editor/trigger-conditions.md) are also not evaluated in the preview: it shows what the payload will look like when the event is sent, not whether a given event would be sent.
{% endhint %}