CSV to Excel
Convert CSV files to Excel XLSX spreadsheets
Drop one or more CSV files
🔒 Files never leave your device
How it works
- 1Upload CSV
Drop or select one or more CSV files.
- 2Convert
Each CSV becomes an .xlsx workbook.
- 3Download
Save the Excel file(s) to your device.
About CSV to Excel
Convert CSV to Excel (.xlsx) in your browser. Preserves numbers, dates and delimiters. No uploads. CSV to Excel on DashConvert runs entirely inside your browser using modern JavaScript APIs — no server ever sees your files. That means faster conversions, complete privacy, and no upload limits.
Whether you need to convert csv files to excel xlsx spreadsheets for work, study, or personal use, this tool is free to use as many times as you need. There are no watermarks, no sign-up, and no ads inside your documents.
Frequently asked questions
Which delimiters are supported?
Comma, semicolon and tab are auto-detected.
Read more
XLS to XLSX: why your old Excel files break in modern tools (and how to fix them)
You inherit a shared drive full of .xls files from 2008. Half of them refuse to open in Excel 365 or Google Sheets. Here's what changed, and how to convert them without losing formulas.
CSV to JSON: nested arrays, typed fields, and mapping real-world data
Converting a flat CSV to a flat JSON array is trivial. Doing it so an API actually accepts the result — with typed numbers, nested objects, and normalized keys — takes a bit more thought.
CSV vs JSON vs Excel: which data format should you use when?
Three formats, three use cases, endless confusion. A practical guide to picking the right one for spreadsheets, APIs, and everything in between.
How to convert Excel to PDF the right way (no cut-off columns)
Excel to PDF sounds simple until you get a PDF where a wide table's last three columns landed on their own separate page. Here's how to actually control the layout.