JSON to CSV Converter

How it works

How to use the JSON to CSV

1. Paste JSON

   Usually an array of objects, such as an API response. Nested objects become columns like address.city.

2. Pick a delimiter

   Comma for most tools, semicolon for European Excel, or tab for TSV.

3. Download the CSV

   Save it as a .csv file or copy it into a spreadsheet. Use Swap to go from CSV back to JSON.

How nested JSON becomes CSV

CSV is flat, JSON is not. Nested objects are flattened into dot-notation columns (customer.address.city) and arrays into indexed columns (tags.0, tags.1). Alternatively, choose As JSON text to keep nested values as JSON inside a single cell. Values containing delimiters, quotes or line breaks are quoted according to RFC 4180.

In the other direction, the converter auto-detects the delimiter, turns numeric and boolean strings into real JSON types, and rebuilds nested objects from dotted headers.

Built for developers

Why developers use it

• Private by design

  Runs 100% in your browser. Nothing you paste is uploaded, logged or stored on a server.

• Instant results

  Output updates as you type, with precise error locations when something is wrong.

• Works offline

  Once loaded, the tool keeps working without a connection. Install it as an app if you like.

• Free, no sign-up

  No accounts, no limits, no watermarks.

FAQ

Frequently asked questions

Keep going

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