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JSON to CSV Converter

Flatten a JSON array of objects into a spreadsheet-ready CSV, with a header row, RFC-4180 quoting, and your choice of delimiter (comma, tab, semicolon, pipe).

ツール要約

このツールは構造化された入力を受け取り、サーバーへアップロードせずにブラウザで決定的な出力を返します。

ツール名
JSON to CSV Converter
入力の目的
変換・検証・分析するソースコンテンツを入力してください。
出力の目的
コピー・再利用・デバッグに適した正規化された出力を受け取ります。
入力例
[{"id":1,"name":"Alice","role":"admin"},{"id":2,"name":"Bob","role":"user"}]
出力例
id,name,role 1,Alice,admin 2,Bob,user

Paste a JSON array of objects above and click Convert to CSV.

ツールの紹介

Flatten a JSON array of objects into a spreadsheet-ready CSV, with a header row, RFC-4180 quoting, and your choice of delimiter (comma, tab, semicolon, pipe).

ツール概要

CSV remains the path of least resistance for moving tabular data between tools. This converter accepts a JSON array of objects (keys become column headers) or a JSON array of arrays (rows written as-is). Cells containing the delimiter, double quotes, or newlines are wrapped in quotes with internal quotes doubled, per RFC 4180. Nested objects and arrays are serialized back to JSON so they survive the round trip.

ユースケース

  • Export API responses into Google Sheets or Excel
  • Seed a database import from a JSON fixture
  • Ship analytics data to stakeholders who live in spreadsheets
  • Create CSV test data from JSON samples

入力／出力の例

入力の目的
[{"id":1,"name":"Alice","role":"admin"},{"id":2,"name":"Bob","role":"user"}]
出力の目的
id,name,role
1,Alice,admin
2,Bob,user
Cells containing the delimiter are automatically quoted (RFC 4180).
入力の目的
[{"product":"Widget, Blue","price":19.99,"inStock":true},{"product":"Gadget","price":42,"inStock":false}]
出力の目的
product,price,inStock
"Widget, Blue",19.99,true
Gadget,42,false
Nested arrays are serialized back to JSON inside the cell so nothing is lost.
入力の目的
[{"name":"Alice","tags":["admin","ops"]},{"name":"Bob","tags":["user"]}]
出力の目的
name,tags
Alice,"[""admin"",""ops""]"
Bob,"[""user""]"

よくある質問

Is this JSON to CSV converter free?+
Yes. Unlimited conversions, no sign-up, no row limit, and everything runs in your browser.
What shape must my JSON have?+
Either an array of flat objects (keys become column headers) or an array of arrays (each inner array is a row). Mixed shapes will produce a validation error.
How are nested objects or arrays handled?+
They are serialized back to a JSON string inside the cell so no information is lost. If you need one column per nested field, flatten the JSON first or pre-process with jq.
Does it escape fields with commas, quotes, or newlines?+
Yes. Cells containing the delimiter, a double quote, or a newline are wrapped in quotes with internal quotes doubled, following RFC 4180.
Can I output tab-separated or semicolon-separated values?+
Yes. Change the delimiter option to Tab, Semicolon, or Pipe — ideal for Excel in European locales or TSV workflows.

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