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# Is Stock Sync able to preview sync without any updates?

|| Available on: ✔️ Add ✔️ Update ✔️ Remove

Stock Sync allows you to preview the differences between your store data and the feed file by enabling **Preview Sync** on the feed details page. This feature is currently available **only for Shopify**.

You do **not** need an active subscription to run or view a Preview Sync.

To learn how Preview Sync works, follow the steps below:

![](https://storage.crisp.chat/users/helpdesk/website/-/b/2/1/9/b219050a5836c000/ezgifcom-video-to-gif-converte_sh4qof.gif)

1. Set up the **feed according to your requirements**, then start the process on the feed detail page.

2. Before you start the process, please make sure that you have selected the **preview sync** option to run process. Here's how it works in different feeds:

| Feed Type | Preview Sync | Actions |
| ---- |
| **Add Feed** | Check the credits required before adding the supplier. | Download the **change log** from Preview Sync to **view the total number of products** and **credits** required. |
| **Update** **Feed** | Preview updates without making changes to your store, and view stock alerts when the out-of-stock strategy is enabled. | Download the **change log** to **view quantity updates** and the **low stock report** for **unmatched variants turn to zero**. |
| **Remove Feed** | Preview updates without making changes to your store, and view stock alerts when the out-of-stock strategy is enabled. | Download the **change log** to see which **products or variants will be removed**. |

3. Please confirm the message to run the process. After running the process, compare the store and feed in the changes log. To access the log, click **View More** > **Change Logs**

![](https://storage.crisp.chat/users/helpdesk/website/b219050a5836c000/screenshot-2024-09-04-at-11554_pfc26a.png)