CSV to JSON

Convert CSV rows into structured JSON for APIs, scripts, and data imports.

About CSV to JSON

Spreadsheets speak CSV, but most APIs and JavaScript code speak JSON. This converter bridges the two by turning each CSV row into a JSON object whose keys come from the header row.

Upload or paste your CSV. The first line is read as field names, and every following line becomes an object in a JSON array. The parser respects quoted fields and common delimiters, so addresses and notes that contain commas stay intact.

Use it to seed a database, to feed test data into an application, to move a contact or product list into a web app, or simply to read tabular data in a format your code already understands. The output is standard JSON you can paste straight into a script or save to a file.

Frequently asked questions

Where do the JSON keys come from?

From the CSV header row. Each column heading becomes a property name on every object.

What if my CSV has no headers?

Add a header row first, otherwise the first data row will be used as the keys.

Are numbers kept as numbers?

Values are emitted as strings to avoid misreading codes like ZIP or phone numbers; convert types in your code if needed.

Does it handle semicolons or tabs?

Yes, common delimiters are detected, and you can clean the file first with the CSV Formatter.

How large a file can I convert?

Typical exports convert quickly; very large files simply take a little longer to process.