Generate a starting type from your CSV headings
When a project receives records from a spreadsheet export or API, a TypeScript interface can make those fields easier to work with in an editor. This converter uses the CSV headings to make a type definition and produces a sample array of objects that follows it.
Column headings are converted to valid camelCase property names. Blank or repeated headings are adjusted so the generated interface does not contain duplicate properties. Review the names if your codebase uses a different naming style.
Understand the generated value types
The generated records preserve CSV cell contents as strings. This is deliberate: CSV does not declare whether a value is an integer, date, identifier, or boolean, and converting a value such as 0015 into a number would remove its leading zero. Edit the interface and parse values in your application when you know the intended type.
The output represents the rows in this file. It does not infer optional fields, unions, nested objects, or validation rules. If a row is shorter than the header, missing fields are represented with empty text.
Convert your file to TypeScript
- Choose a CSV, TSV, or delimited text file.
- Generate the interface and object array.
- Review property names and string types in the code preview.
- Copy the code or download a TypeScript source file.
Questions about CSV to TypeScript
Does the tool infer numbers and dates?
No. Values remain strings so source formatting is preserved. Convert them to the application types you expect.
How are invalid headings handled?
Headings are normalized into valid property identifiers, and duplicates are made unique with a suffix.
Does the first row become a record?
No. The first row is used for the interface fields; following rows become objects in the example array.
Can I use this as runtime validation?
No. A TypeScript interface is checked during development and does not validate incoming data at runtime. Add a runtime validator if your app needs one.
Is my CSV uploaded?
No. The converter runs in your browser.
Related code converters
Generate JavaScript objects with CSV to JavaScript Array or convert records into Python dictionaries with CSV to Python Dictionary. Browse all CSV tools.