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Convert locally through a measured streaming pipeline, with direct-to-disk output where the browser supports it.
Convert CSV, TSV, PSV, JSON, NDJSON, JSONL, YAML, XML, XLSX, XLS, and ODS in your browser. Files never leave your device. Choose a worksheet and header row for workbooks. Outputs are CSV, JSON, NDJSON, or XML. Formula results use cached values; formulas are never executed.
Preparing the local converter…
Need your users to import files into your product?
Add mapping, validation and accepted-batch delivery to the experience.
Try the data importer →Try with sample data
Use the CSV, TSV, PSV, JSON, NDJSON, JSONL, YAML, or XML buttons in the file area above to load a real example instantly.
Need format detection first?
Inspect formats and structure without converting. Go to detection
Capabilities include conversion, detection, transformation, and streaming telemetry.