オンラインCSV/Excel JSON変換ツール
CSV、Excel（XLSX、XLS、ODS）、またはTSVデータをクリーンで構造化されたJSON形式に変換します。バッチ処理、自動エンコーディング検出、高度なフォーマットオプションをサポートします。
入力CSV
フィールドマッピング（オプション）
以下の新しい名前を入力して、出力JSONキーの名前を変更します。
データプレビュー（最初の10行）
How to Use
Drag and drop one or multiple CSV files into the upload area, or simply paste your CSV content into the text field.
Adjust parsing settings like separators and encoding. Use advanced options to handle null values or convert date formats.
Check the data preview to ensure correct parsing. Rename any fields in the "Field Mapping" section if needed.
Click "Convert to JSON Now" to see the result. You can then copy it to your clipboard or download it as a .json file.
Advanced CSV to JSON Conversion
Our Online CSV to JSON Converter is designed for developers and data analysts who need a reliable, fast, and feature-rich tool for data transformation. Unlike simple converters, we provide deep control over how your data is processed.
Batch Processing
Upload multiple CSV files at once. Our tool will parse them all and combine the records into a single JSON array, saving you time on repetitive tasks.
Smart Type Detection
Automatically detect numbers, booleans, and null values. You can also customize how empty cells are treated in the output JSON.
Why use JSON?
JSON (JavaScript Object Notation) is the standard format for data exchange on the web. It's easy for humans to read and write, and easy for machines to parse and generate. By converting your CSV data to JSON, you make it ready for use in web applications, APIs, and modern databases like MongoDB.