Shape a CSV table into a JSON response object
Many APIs return more than a bare list. An endpoint response may place records inside a named property and include useful context, such as the number of rows and the fields available. This converter creates that response-shaped structure from a CSV with column headings.
Each data row becomes an object. The heading in each column becomes its property name, and each cell becomes a string value. The records are placed in a top-level array property, named data by default, alongside a meta object that contains rowCount and the list of column names.
What the generated JSON contains
For a CSV with id,name followed by 1,Asha, the data array contains an object like {"id":"1","name":"Asha"}. The metadata describes the generated list; it does not create pagination links, API routes, or database types. Values stay as text so identifiers such as 0012 keep their original formatting.
Choose a property name that fits your endpoint
Use a simple name such as data, records, or items. The name must be a valid JavaScript-style identifier: it can start with a letter, underscore, or dollar sign, and can continue with letters, numbers, underscores, or dollar signs. The converter also uses unique property names for repeated or blank headings so each row remains a valid JSON object.
Convert and review the response
- Upload a CSV, TSV, or delimited TXT file, or paste the table.
- Review the parsed source table and enter a name for the data array property.
- Generate the JSON and check the preview, including the record count.
- Copy the JSON or download it as
api-data.json.
Quoted fields, embedded separators, and escaped quotation marks are handled as CSV text. The source file remains unchanged. Conversion happens in your browser; files up to 50 MB are supported.
Questions about CSV to API JSON
Does the first row become a data record?
No. The first parsed row supplies the object property names. Remaining rows become objects inside the chosen array property.
Are number-looking values converted to numbers?
No. Cell values remain strings, preserving formatting such as leading zeros. You can convert types in your API or data-processing code if needed.
What metadata is included?
The generated meta object contains the data row count and the list of column property names.
Can I change the array property from data?
Yes. Use a simple identifier such as records or items.
What happens to duplicate column headings?
Repeated headings are made unique by adding a suffix, so a JSON object never has duplicate property names that overwrite each other.
Does this create a live API endpoint?
No. It generates JSON content shaped like an API response. You can then use that JSON in your application or endpoint.
Is my CSV uploaded?
No. The file is read and converted in your browser.
Related conversion tools
For a plain array of row objects, use CSV to JSON. To turn JSON records back into a spreadsheet-friendly file, use JSON to CSV. Browse all CSV tools.