Excel to Parquet Converter

Convert an Excel (.xlsx) sheet to a Parquet file online. Column types are detected, and the file never leaves your browser.

Quick answer: Convert JSON, CSV, Parquet and Excel – one file or a whole folder.

Related: JSON, CSV, Parquet and Excel Converter · JSON to CSV Converter · CSV to JSON Converter · CSV to Parquet Converter · Parquet Guides and Free Parquet Tools

How to use the Excel to Parquet Converter

Convert JSON, CSV, Parquet and Excel – one file or a whole folder.

The Format Converter moves data between JSON, CSV, Parquet and Excel without code or an install. It reads your file in the browser, flattens nested JSON into columns, keeps or guesses column types, and writes the format you choose. Use it to open API data in Excel, load a spreadsheet into an app, shrink a big CSV into Parquet, or look inside a Parquet file. Nothing is uploaded, so it is safe for customer and business data.

  1. Pick From and To
  2. Drop or paste your data
  3. Convert and download

Tips

Example

Input: report.xlsx

Output: report.parquet

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Who uses Data Utility

Frequently asked questions · Data format benchmark

Frequently asked questions

Why convert Excel to Parquet?

Parquet is smaller and faster to load in tools like pandas, Spark, DuckDB and BigQuery.

Are numbers and dates kept as types?

Yes. Turn on type detection and numbers, dates and booleans are written as real column types.

How big can a file be?

It depends on your device. A few hundred MB usually works.

Which conversions does the Format Converter support?

Any direction between JSON, CSV, Parquet and Excel (.xlsx), for one file or a whole folder. Nested JSON is flattened into columns such as address.city. For Excel, the first sheet is read; old .xls files are not supported.

Why did my number or date change after converting?

Types are detected from the values. Turn off "Detect types" to keep everything as text, which also keeps leading zeros in IDs and phone numbers.

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