CSVデータをJSON形式に即座に変換する無料オンラインツール。ブラウザ内で実行されます。
CSV → JSON コンバーター is a free online データ tool that works right in your browser — whatever you enter is processed locally and never sent to a server. No installation, no signup; works on both phone and desktop, ready to use instantly.
データツールは CSV、JSON、SQL などの構造化フォーマットに対応しています。ピボットテーブル、チャート生成、クリーニング、分析機能で日常のデータ作業をサポートします。
We found that most online data tools require uploading CSV and JSON files to their servers. We built this tool to process everything locally in your browser — your datasets never leave your device.
Data analysts, spreadsheet users, and backend developers working with tabular data. When you receive a file in one format but need it in another, or when you need to transform records for a database import, this data tool bridges the gap without a full ETL pipeline.
はい、完全無料で登録不要です。
はい、モバイルブラウザでタッチ操作に対応しています。
データ
ブラウザのメモリに依存します。通常10万行までのCSV/JSONデータをスムーズに処理できます。
ToolPure supports CSV, JSON, XML, YAML, TSV, and Excel (XLSX) formats. You can convert between any of these formats, with automatic type detection for dates, numbers, and booleans.
The data tools can handle up to 500,000 rows in CSV format and 100,000 rows in JSON format. Processing uses Web Workers to maintain UI responsiveness with large datasets.
Yes, you can filter data by column values, sort by multiple columns, and remove duplicates before exporting. The tools also support pivot table generation and statistical summaries (sum, average, min, max, count).
Yes. CSV → JSON コンバーター is a pure front-end tool: whatever you type or paste is processed only in your browser's memory and never sent to a server. It disappears as soon as you refresh or close the page.
🔒 Privacy & Security：All processing happens locally in your browser. Files are never uploaded or stored.
🔒 Privacy: All processing happens locally in your browser. Your files and data never leave your device — no upload, no server, no tracking.