Excel to CSV

Formulas are exported as their last calculated value, not the formula. Only the first sheet comes across, and cell formatting is gone.

Runs in your browser // nothing is uploaded

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What survives the conversion

Derived from what each format is able to store, not from what the conversion promises.

Kept

Row and column values

Lost

Formulas
Multiple sheets
Cell formatting
Column types

Settings used

First worksheet read with SheetJS and written as RFC 4180 CSV.

When not to convert

Not for a workbook with multiple sheets or live formulas. You will lose both.

About these formats

Data

What is a CSV file?

CSV is plain text where each line is a row and values are separated by commas. It is the most portable tabular format in existence and has no types, no formulas and no sheets. Its weakness is ambiguity: quoting, encodings and delimiters vary between tools.

Read the format guide

Common questions

Does converting Excel to CSV lose anything?

Yes. Formulas, Multiple sheets, Cell formatting, Column types cannot be carried into CSV and are dropped. Formulas are exported as their last calculated value, not the formula. Only the first sheet comes across, and cell formatting is gone.

Are my files uploaded when I convert Excel to CSV?

No. The conversion runs in your browser tab, so the file is never transmitted and the page works offline once loaded.

What settings does Filoven use for Excel to CSV?

First worksheet read with SheetJS and written as RFC 4180 CSV.

When should I not convert Excel to CSV?

Not for a workbook with multiple sheets or live formulas. You will lose both.

Related conversions

CSV to Excel

Not if the file feeds a script or a data pipeline. Those want CSV.

JSON to CSV

Not for deeply nested data. The result will either be lossy or unreadable.

CSV to JSON

Check ID and postcode columns before trusting the output in a downstream system.

This page uses the CSV ⇄ Excel, which handles other formats too.

Last updated 2026-08-03