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Multiway Converter

Upload a dataset to begin

Supported formats: .csv,.xlsx,.xls,.xlsm,.xlsb,.tsv

Free users: Up to 1MB per file.
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AboutMultiway Converter

Convert between Excel (XLS, XLSX), JSON, CSV, and TSV formats instantly in your browser. Free universal file converter that handles large datasets, preserves UTF-8 encoding, auto-detects delimiters, and keeps your data private with local-only processing. No file size limits.Category: Conversion & Export
Converting Excel inventory to CSV for ShopifyTransforming CSV data to JSON for web appsBatch converting daily reports
The Multiway Converter tool is compatible with:ExcelGoogle SheetsJSON APIsLegacy Systems.Use this when the target format is a moving target, e.g. pulling from an Excel export and needing both a CSV_TO_JSON payload for an API and an XLSX copy for finance; run the file once here instead of chaining single-purpose converters.
Stop struggling with incompatible file formats. The Multiway Converter is your all-in-one tool to transform data between Excel, CSV, JSON, and more. Unlike simple "Save As" functions, this tool handles encoding issues (UTF-8), delimiter detection, and large file sizes directly in your browser. Perfect for developers needing JSON for APIs or analysts needing Excel for reporting.

Frequently Asked Questions:

Is there a file size limit?

No, it's built to handle large datasets directly in the browser without a hard file size cap.

Does my data get uploaded to a server?

No, all conversion happens locally in your browser, nothing is uploaded.


Built for teams juggling exports from multiple systems that never agree on a file format.