> For the complete documentation index, see [llms.txt](https://docs.coupler.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coupler.io/functionality/preview-data/preview-data-and-data-sets.md).

# Preview data and Data sets

Preview your imported data in Coupler.io before running an export. Verify data structure, check for issues, and review up to 500 rows per source.

Preview data and transformation (Data sets) allow you to have more control over your data, helping you to ensure its accuracy and consistency, which is essential for successful data analysis and reporting.

### Preview data

This preview feature allows users to view their data before exporting it into the spreadsheet or table, giving them the opportunity to detect any issues or inconsistencies before it is exported.

#### How to preview data? <a href="#how-to-preview-data" id="how-to-preview-data"></a>

{% @arcade/embed url="<https://app.arcade.software/share/SUA2YjQOypKYZT0Ygq0G?ref=share-link>" flowId="SUA2YjQOypKYZT0Ygq0G" %}

1. Once you complete the source configuration, you’ll see the option to preview and transform your data
2. When you click on it, Coupler.io returns a window with two or more tabs (depending on how many sources you have enabled). The **Preview results** tab will show the data values that will be imported into your destination file. If the data does not need any transformation, you could click on Proceed and continue setting up your importer.


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