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Use file upload when you already have a prepared set of test cases and want the fastest path to a structured dataset version. PromptLayer accepts CSV and JSON files so you can turn offline examples, QA sheets, or exported test cases into reusable evaluation inputs. JSON or CSV files are accepted for the dataset input file.

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Create a Dataset in the UI

If you’re starting in the PromptLayer app, this is the fastest path to upload a prepared dataset file.
  1. Go to the workspace where you want to store the dataset.
  2. Click New and create a Dataset.
  3. Click Upload data.
  4. Choose a CSV or JSON file from your computer.
  5. Review the imported rows and click Save Dataset when you are ready to publish the version.

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Create Datasets Programmatically

You can also create datasets from uploaded CSV or JSON files through the API. This is useful when you want to automate evaluation setup, sync prepared test cases from another system, or integrate dataset creation into your own workflow.

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File Formats

PromptLayer accepts CSV and JSON files for dataset uploads.

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CSV

In CSV format, the column headers define the columns and each record is a separate row. 
name,age,location
John Doe,30,New York
Jane Smith,35,Los Angeles
Michael Johnson,40,Chicago

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JSON

In JSON format, each row is a separate object. The object keys define the column names, and the values should be the values you want in the dataset. 
[
  {
    "name": "John Doe",
    "age": 30,
    "location": "New York"
  },
  {
    "name": "Jane Smith",
    "age": 35,
    "location": "Los Angeles"
  },
  {
    "name": "Michael Johnson",
    "age": 40,
    "location": "Chicago"
  }
]