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Online Converter: Convert Excel (XLSX, XLS) file to JSON Lines (NDJSON) format
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Convert Excel spreadsheets to JSON Lines (JSONL/NDJSON) format for data pipelines, machine learning workflows, and streaming applications. Transform your XLSX and XLS files into the line-delimited format preferred by modern data tools.
Ideal for preparing spreadsheet data for ML model training, log ingestion systems, or any application that processes records one at a time.
Each row in your Excel spreadsheet becomes a JSON object on its own line. Column headers become object keys, and cell values become the corresponding values with appropriate types (numbers, strings, dates).
The converter processes the first worksheet in your Excel file. For multi-sheet workbooks, save each sheet separately if you need to convert them all.
Formulas are converted to their calculated values. The JSONL output contains the data values, not the formula expressions.