LeapRowsLeapRowsBeta
  1. Home
  2. Free Online File Converter Tools

Free Online File Converter Tools

Convert CSV and Excel (XLSX) files instantly in your browser. Powered by DuckDB-WASM, handles up to 1 million rows with no server upload.

CSV Converter Tools

Convert CSV files to JSON, Parquet, TSV, XLSX and more. Reverse conversions also supported.

4 tools

Excel (XLSX) Converter Tools

Convert Excel XLSX files to CSV, JSON, or Parquet format. Handles up to 1 million rows.

4 tools

JSON Converter Tools

Convert JSON files to CSV and other formats. Paste or upload, no server required.

4 tools

Parquet Converter Tools

Convert Apache Parquet files to CSV, JSON, Excel, or TSV format. Browser-based with DuckDB-WASM.

4 tools

LeapRows Beta

A blazing-fast CSV analysis platform that runs entirely in your browser. Data analysis, simplified and accelerated.

Product

  • Dashboard
  • Pricing

Free Online Converters

  • CSV Converter Tools
  • Excel Converter Tools
  • JSON Converter Tools
  • Parquet Converter Tools

Support

  • Contact

© 2026 LeapRows. All rights reserved.

|Terms of ServicePrivacy PolicyRefund PolicyLegal NoticeOSS Licenses
日本語English

* Excel is a registered trademark or trademark of Microsoft Corporation in the United States and/or other countries.
* Other company and product names mentioned may be trademarks of their respective owners.