> 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/workspace-management/file-transformer/running-file-transformer.md).
# Run File Transformer
This feature allows you to check whether the file transformer you built is working properly or not.
### Run import file transformer
After creating a file transformer, you can test it by following these steps:
1. Upload a file in the **Input** section.
2. Click **Run**.
3. View the result in the **Output** section.
### Run export file transformer
After creating an export file transformer, you can test it by following these steps:
1. In the **Input** section, click **Select sample** and choose a sample. You can select a file from an existing project or use a sample template.
2. If you select **File from existing project**, a dialog will appear for file selection. Select a project on the left, then choose one file on the right side.
3. If you don't have any existing projects in the workspace, choose **Sample templates**. A dialog will appear for template selection.
4. After you select a file, the input will be displayed in JSON format.
5. Click **Run**, then view the result in the **Output** section.
