JSON ↔ CSV Converter

When to convert JSON ↔ CSV

• Export API data: API returns JSON, your boss/client needs Excel/CSV — convert fast, no code needed.
• Import into Google Sheets / Excel: pasting CSV is easier than parsing JSON.
• Database migration: dump JSON from MongoDB → CSV for MySQL/PostgreSQL import.
• Data cleaning: convert back and forth to inspect structure.
• Sharing datasets: CSV is smaller and opens in any text editor.

Features

• Auto-convert: type JSON on the left, CSV appears on the right after 200ms.
• Flatten nested objects: {"user":{"name":"a"}} → column user.name.
• Custom delimiter: comma (default), semicolon (European Excel), tab, pipe.
• Quote all values: forces every cell to be wrapped in " — safe for fields with commas or newlines.
• Auto type parsing: CSV → JSON automatically converts "123" → 123, "true" → true.
• Download .json / .csv: click ⬇ to save the file.

CSV gotchas

• European Excel uses semicolon ; instead of comma — good for data with decimal commas.
• Cells with commas / newlines: the tool wraps them in " automatically (RFC 4180).
• Cells with quotes: doubled to "" per RFC 4180.
• BOM for Excel: if non-ASCII characters look wrong, re-save the file with UTF-8 + BOM in a text editor.