What This Tool Does
This is a free excel parser online that reads an actual .xlsx Excel file, the real binary spreadsheet format, and lets you export any sheet as JSON or CSV. It's different from a paste-based CSV converter: instead of copying cells out of Excel and pasting them as text, you upload the .xlsx file itself, and every sheet in the workbook is parsed and available to browse.
How to Parse an Excel File
Click the upload zone or drag an .xlsx file onto it, the file is parsed immediately and a preview table appears. If the workbook has more than one sheet, tabs let you switch between them, each with its own preview and export. Choose JSON or CSV from the format dropdown, then copy or download the result.
JSON vs CSV Export
JSON export treats the first row as column headers and outputs an array of objects, one per data row, keyed by those headers, columns with a blank header get a fallback name like col1. CSV export outputs the sheet as-is, including the header row, with values containing a comma or quote automatically wrapped in quotes.
Why Upload the File Instead of Pasting Data
Copying and pasting cells from Excel only carries over the visible text, losing multiple sheets, and can behave inconsistently across spreadsheet apps and operating systems. Uploading the actual .xlsx file reads the real underlying spreadsheet structure directly, so every sheet, and the exact cell values, come through reliably.
Common Uses for an XLSX Parser
Converting an Excel export from an accounting or CRM tool into JSON for an API or script, pulling a specific sheet out of a multi-sheet workbook without opening Excel, and checking what data is actually inside an .xlsx file before importing it somewhere else are all common reasons to parse an Excel file online. As an xlsx parser online, it works equally well as an xlsx to json converter or a way to convert xlsx to csv online, letting you parse excel file in browser with no install, read xlsx file online, and treat it as excel to json no upload, excel spreadsheet to json, and xlsx to csv converter free all in one place.