Excel to CSV Converter | Free XLSX to CSV Online Tool

Excel to CSV converter turns any .xlsx or .xlsm worksheet into clean CSV, with sheet picking, custom delimiters and ISO dates. Free, private and runs in your browser. Designed specifically for developers and professionals, this free online converter runs entirely in your browser to process tasks quickly and securely. Enjoy unlimited usage with no data tracking and no registration required.

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csv and spreadsheet tools

file converters

converters

Excel Workbook Input

Drop an .xlsx workbook here or click to browse

.xlsx and .xlsm files stay on your device, nothing is uploaded

Worksheet

Delimiter

Dates as ISO (YYYY-MM-DD)

Quote every field

CSV Output

About Excel to CSV Converter

Convert an .xlsx or .xlsm workbook to CSV in your browser, pick any worksheet, choose the delimiter and get UTF-8 output that imports cleanly into Postgres, MySQL, pandas or any script that reads CSV.

Key Features

Reads every worksheet in the workbook and converts the one you pick, or all of them as a ZIP
Comma, semicolon, tab and pipe delimiters with RFC 4180 quoting for commas, quotes and line breaks
Turns Excel date serials into ISO dates instead of numbers like 46248
Handles shared strings, inline strings, booleans and sparse sheets up to 250,000 rows

Use Cases

Prepare a spreadsheet for a COPY or LOAD DATA INFILE import into Postgres or MySQL
Feed a finance or analytics export into a pandas, R or Node script that expects CSV
Convert a client workbook on a locked down machine where Excel is not installed

Related Keywords

excel to csv converter

xlsx to csv online

convert excel to csv free

spreadsheet to csv

xlsm to csv converter

excel to tsv converter

Your workbook never leaves your device

The .xlsx file is unzipped and parsed entirely in your browser with JavaScript, so payroll, revenue and customer spreadsheets are never uploaded to a server.

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Frequently asked questions

What is Excel to CSV Converter used for?

Excel to CSV converter turns any .xlsx or .xlsm worksheet into clean CSV, with sheet picking, custom delimiters and ISO dates. Free, private and runs in your browser.

Is Excel to CSV Converter free to use?

Yes. Excel to CSV Converter is completely free with no usage limits, and there is no paid tier required to use it.

Do I need an account to use Excel to CSV Converter?

No. Excel to CSV Converter works immediately in your browser with no signup, login, or email address required.

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