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JSON → CSV 変換

JSON to CSV converter: convert JSON array to CSV with custom delimiters and header export for data processing, one-click copy, offline and multilingual.

使い方

JSON 配列（オブジェクトの配列）を貼り付け、区切り文字を選択。CSV がリアルタイム生成。

Overview

JSON to CSV is a Developer tool. Convert JSON array to CSV with custom delimiters and header export for data processing, one-click copy, offline and multilingual. It runs 100% in your browser with no upload, so you get instant results with privacy. Whether you need a quick answer or batch processing with precise control, you can enter, validate and export in seconds. The UI is responsive on mobile, tablet and desktop and supports one-click copy.

Use cases

  • Daily use of JSON to CSV: Paste a JSON array of objects, choose a delimiter. The CSV is generated live. — enter and get instant results without manual lookup.
  • One-click copy keeps results ready to save, check or share with family and pros.
  • Use JSON to CSV offline or on poor network — all calculations stay local and private.
  • Test regex with highlights
  • Escape code for string literals

How to use

  1. 1 Paste a JSON array of objects, choose a delimiter. The CSV is generated live..
  2. 2 Pick action and options
  3. 3 Fix highlighted errors
  4. 4 Copy or export

Highlights

  • Local & private: processing stays in your browser
  • Live validation with tolerant parsing
  • One-click copy and export for docs, code or sheets
  • Batch and offline support under poor network

Notes

  • Strict JSON disallows comments/trailing commas
  • Watch greedy vs lazy regex
  • Disable live validation for large files

FAQ

Offline?
Yes, parsing is local.
Why invalid?
Trailing commas, single quotes or BOM often cause it.
How is JSON to CSV different?
It runs locally with a focus on speed and privacy, plus tolerant parsing for “json to csv” and one-click copy for reuse.
Can I use results in official reports?
Use it as a working draft and cross-check with authoritative sources; keep the exported log and parameters for traceability.
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すべての計算はブラウザ内で実行され、データはアップロードされません。