JSON to CSV Converter

Flatten an array of JSON objects into downloadable CSV rows.

The JSON to CSV Converter flattens an array of JSON objects into plain CSV rows you can open in a spreadsheet or load into a database. It reads the top-level objects and turns each key into a column, filling in empty values where a record is missing a field. Use it to export API results, sample structured data, or hand off machine-readable records to non-technical teammates. The output preserves the field order and quotes values that contain commas, so the file stays well-formed. The result is a plain text file you can save and open anywhere, which makes it the bridge between a JSON API and the spreadsheet workflows many teams still run on every day. The value of this conversion shows up whenever the people who need the data do not work in JSON. An API returns a list of records, and someone wants it in a spreadsheet so they can sort, filter, and chart it without asking an engineer for every view. Turning each top level object into a row and each key into a column produces exactly that, and quoting any value that contains a comma keeps the file well formed even when the data is messy. Where a record holds a nested object the tool flattens it so each leaf becomes its own column, which keeps the spreadsheet usable instead of dropping the structure into an unusable cell. The field order is preserved from the first record, so the columns come out in a predictable sequence rather than an alphabetical jumble. What you get is plain text that opens in any spreadsheet program or loads into a database import step with no intermediate scripting, which is why this is the shortest path between a JSON service and a report a stakeholder can actually read.

Private by design. Every tool runs 100% in your browser — your code, text, and tokens never leave your device. Nothing is uploaded or stored.
CSV output

CSV appears here.

Frequently Asked Questions

How are nested objects handled?

Top-level arrays of flat objects map cleanly; deeply nested fields are flattened or skipped, so preview before exporting.

Why flatten to CSV?

Spreadsheets and many pipelines expect rows and columns; CSV is the lowest-friction interchange.

Is my data uploaded?

No. Conversion happens locally in your browser.

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