Spreadsheet Converter
Free online spreadsheet converter. Convert Excel (XLSX/XLS), CSV, TSV, JSON and ODS between each other — Excel to CSV, Excel to JSON, CSV to Excel, JSON to Excel and more. Everything runs in your browser, so your data is never uploaded.
Drop a spreadsheet or data file
or click to choose · XLSX, XLS, CSV, TSV, JSON, ODS — converted in your browser
Frequently asked questions
Is the spreadsheet converter free and private?+
Yes. It runs entirely in your browser using SheetJS — your files and data are never uploaded, with no limits or watermarks.
Which formats can I convert?+
Excel (XLSX, XLS), CSV, TSV, JSON and ODS — in any combination. Excel→CSV, Excel→JSON, CSV→Excel, JSON→Excel, and more.
Does it keep my columns and formatting?+
Column data and the first sheet are preserved. CSV/TSV/JSON are plain data formats, so styling (colors, fonts) isn't carried over — only the values.