Convert an Excel spreadsheet to a plain CSV file, instantly. 100% free, no sign-up — nothing ever leaves this browser tab.
Excel to CSV takes the first sheet of your workbook and converts it into a plain-text CSV file — the universal format most software, scripts, and import tools expect. Everything happens in your browser using the SheetJS library, so your spreadsheet data is never uploaded anywhere.
This is the tool people reach for when a system only accepts CSV uploads, or when they need to hand off data to a script, database import, or another tool that doesn't understand .xlsx files. Formatting, formulas, and multiple sheets are simplified down to plain rows and columns — exactly what a CSV is meant to hold.
No installs, no accounts — just your browser doing the work.
Scroll up (or tap the button above) to load the tool instantly — no account or install needed.
Add your file, text, or numbers into the tool above.
Sensible defaults are already selected — tweak anything you need.
Your result is generated locally and ready in seconds — no waiting room.
Every row and column is preserved exactly — no rounding, no reformatting.
Your spreadsheet is read directly in this browser tab and never uploaded.
Conversion happens the moment you drop the file — no server queue.
Because Excel to CSV runs locally, teams handling sensitive data — finance, HR, legal, operations — can use it without the compliance questions that come with uploading documents to a third-party server.
Only the first sheet in the workbook is converted. Split other sheets into separate files first if you need them too.
No — CSV has no concept of formulas, so cells are converted to their calculated values.
No. Excel to CSV runs entirely in your browser using the SheetJS library.