> For the complete documentation index, see [llms.txt](https://docs.datasaur.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.datasaur.ai/advanced/extensions/grammar-checker.md).

# Grammar Checker

**Grammar Checker** is an extension that detects grammatical errors in text data. It highlights potential issues and helps users review and correct text more efficiently.

<figure><img src="/files/j441Qc7vknHx21vKrQyR" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
**About LanguageTool**

[LanguageTool](https://languagetool.org/) is an open-source proofreading tool that supports English, Spanish, and many other languages. Datasaur uses the open-source version of LanguageTool.\
\
For more information, see the [LanguageTool rules documentation](https://community.languagetool.org/rule/list?lang=en).
{% endhint %}

## Enable Grammar checker

1. Open **Manage extensions** and enable the **Grammar Checker** extension.
2. Click **Check document** to start checking for grammar issues.
3. Click **Clear results** to remove detected results.

## How it works

* **Grammar checker** scans the entire document.
* Detected issues appear in the extension panel and are underlined in red in the text editor.

  <figure><img src="/files/TT51lmptLVauKz4ffZGD" alt=""><figcaption></figcaption></figure>
* Clicking an item in the grammar mistakes list jumps to the related line.

  <figure><img src="/files/KBoSmlpWNQQfzok4BcXu" alt=""><figcaption></figcaption></figure>
* Modified lines are automatically rechecked when changes are made.


---

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