Excel ↔ CSV Converter
Change the file format, keep the details. Convert one Excel worksheet to CSV, or turn a CSV into Excel with identifiers safely stored as text.
- 1Choose file
- 2Preview data
- 3Download
A simple switch of format
No uploadsDrop your Excel workbook here
.xlsx, .xls, .csv or .tsv · one file, up to 10 MB · 50,000 rows, 200 columns, 1 million cells
Your spreadsheet stays on this device. The file type selects the conversion direction automatically.
Column types — Text by default; change amount columns if needed
Text preserves leading zeros, dates, long IDs, and formula-like text exactly. Number is for amounts with a decimal point and optional thousands commas. Values with leading zeros or more than 15 significant digits must stay Text.
Review your data
Download your converted file
Adds an apostrophe to text starting with =, +, − or @. The preview shows any added prefixes. Numeric Excel cells are unaffected.
CSV stores one sheet’s values, without styles, merged cells, charts, or formulas. Opening a CSV directly in Excel may make Excel guess cell types; use Text import to retain identifiers, or choose XLSX for typed text cells. Digits already rounded in the source workbook cannot be recovered.