Free CSV to Pydantic Converter — generate a typed BaseModel from CSV columns in your browser

What Is CSV to Pydantic Conversion?

CSV to Pydantic conversion turns the columns of a CSV file into a typed Pydantic BaseModel describing one row. Each header becomes a field, and the converter infers the field type from the column values — whole numbers become int, decimals become float, true/false becomes bool, and the rest stay str. The result is a validation-ready model, perfect for loading and checking CSV data in data and ETL pipelines.

How Type Inference Works

CSV cells are untyped text, so the tool scans all rows of each column and assigns the narrowest fitting Python type:

  • int — every non-empty value is a whole number.
  • float — every value is numeric and at least one is a decimal.
  • bool — every value is true or false (any case).
  • str — the fallback for mixed, text, or empty columns.

How to Use the CSV to Pydantic Converter

  • Paste CSV with a header row into the input, or load the example.
  • Click Convert to Pydantic to generate the model.
  • Copy it into your Python project and validate rows with it.

Common Use Cases

Validate a CSV import row-by-row, build a typed model for a data-ingestion or ETL job, parse spreadsheet exports into Pydantic objects, or document the expected shape of a dataset — all in your browser, with nothing uploaded.

Frequently Asked Questions

Does it infer int, float and bool, or just str?

It infers types. Fields become int, float or bool when every value in the column qualifies; otherwise the field is str.

Does the model represent one row or the whole file?

One row. Validate each parsed CSV record against the model, e.g. [Row(**r) for r in reader].

Is it Pydantic v1 or v2?

The generated model uses standard BaseModel field syntax that works with both Pydantic v1 and v2; adjust validators or config to your version if needed.

Is my CSV uploaded to a server?

No. Conversion runs entirely in your browser — your data never leaves your device.