XLSX file format

Microsoft Excel

What a XLSX file is, and everything you can convert it to and from.

What is a XLSX file?

Excel's format storing sheets, formulas and charts as XML.

spreadsheet · lossless · data, calculations and shared spreadsheets

Convert XLSX to

XLSX → CSV XLSX → JSON XLSX → ODS XLSX → PDF XLSX → TSV XLSX → YAML

Convert to XLSX from

CSV → XLSX ET → XLSX FODS → XLSX JSON → XLSX ODS → XLSX TSV → XLSX XLS → XLSX YAML → XLSX YML → XLSX

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Last updated July 2026