JSON to CSV Converter

How to use the JSON to CSV Converter

Convert a non-empty JSON array of objects into CSV using the union of object keys as the header row.

Convert an array of similarly shaped JSON objects into CSV with controlled headers, quoting, and spreadsheet-formula protection. The safety option remains available because text beginning with formula characters can execute when opened in spreadsheet software.

The selected file is processed in browser memory. Keep an original copy and inspect the downloaded result before using it as an authoritative or archival document.

1. Paste a JSON array whose items are objects.
2. Fieldlet gathers all top-level keys into CSV columns and escapes commas, quotes, and line breaks.
3. Copy the result or download a UTF-8 CSV file.

Last reviewed for accuracy: 2026-08-30

Worked examples

How the result is produced

The converter forms a header set, serializes each value, doubles embedded quote characters, and quotes fields containing separators, quotes, or line breaks. Formula protection is applied to string cells before download.

• CSV has no universal native type system
• Fields with commas, quotes, or newlines require quoting
• Values beginning with =, +, -, or @ can be risky in spreadsheets

CSV is a transport format, not a typed database

CSV preserves rows and textual cells but does not carry JSON's object nesting or reliable value types. Review identifiers, dates, nulls, and nested values before relying on the export.

• Keep leading-zero identifiers as text.
• Choose how null and missing values should appear.
• Inspect protected formula-like strings in the destination spreadsheet.

Limitations and common mistakes

• Nested arrays and objects need a selected flattening or serialization policy.
• Spreadsheet applications differ in delimiter, encoding, formula, and date interpretation.

Common questions