---
title: >-
  Online Store 2.0: Detect theme errors with Theme Check - Shopify developer
  changelog
description: >-
  Shopify’s developer changelog documents all changes to Shopify’s platform.
  Find the latest news and learn about new platform opportunities.
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    https://shopify.dev/changelog/online-store-2-0-detect-theme-errors-with-theme-check
  md: >-
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    displayName: Tools
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  createdAt: '2021-06-25T16:43:36-04:00'
  postedAt: '2021-06-29T00:00:00-04:00'
  updatedAt: '2024-02-02T10:05:01-05:00'
  effectiveAt: '2021-06-29T00:00:00-04:00'
---

June 29, 2021

Tags:

* Tools

# Online Store 2.0: Detect theme errors with Theme Check

Theme Check scans themes for errors and highlights Shopify theme and Liquid best practices. You can run these checks as a part of the Shopify Liquid Visual Studio Code extension. Theme Check identifies several types of issues within your theme code, including:

* Liquid syntax errors
* Missing templates
* Unused variables and snippets
* Unknown and deprecated tags
* Excessive snippet nesting
* Performance issues

[Learn more about Theme Check](https://shopify.dev/themes/tools/theme-check).