CSV to JSON Converter
Turn CSV data into structured JSON.
About the CSV to JSON Converter
Convert CSV data into structured JSON in your browser. Paste or upload a CSV and get clean JSON with automatic header detection and basic type inference — no upload, your data stays local.
How to use it
- 1Paste your CSV or upload a .csv file.
- 2The first row is treated as headers; rows become JSON objects.
- 3Copy or download the resulting JSON.
From spreadsheet to structured data
CSV is the lowest common denominator for exporting data — every spreadsheet and database produces it — but it's awkward to work with in code because it's just rows of text. JSON, by contrast, is the native format for JavaScript, APIs and most modern tooling. This converter reads your CSV, treats the first row as field names, and turns each remaining row into a JSON object keyed by those names, inferring numbers and booleans along the way. That turns a raw export into data you can drop straight into an app, a config file or an API request.
Common uses
- Converting a spreadsheet export into JSON to seed an app or database.
- Transforming CSV data into objects for use in a JavaScript project.
- Quickly reshaping tabular data into a format an API expects.
Frequently asked questions
- Is my data uploaded to a server?
- No. Parsing and conversion happen entirely in your browser.
- How are data types handled?
- Values that look like numbers or booleans are inferred as such rather than left as strings, so the resulting JSON is ready to use programmatically. Everything else stays as text.