Convert XLSX to CSV online in seconds — free, with no sign-up. CSV is lossless and ideal for exporting and importing raw data between tools. Your files are encrypted and deleted automatically after 24 hours.
XLSX
Microsoft Excel — Excel's format storing sheets, formulas and charts as XML.
CSV
Comma-Separated Values — Plain-text tabular data that opens in any spreadsheet or database.
How to convert XLSX to CSV
- 1Upload your XLSX file
Click “Choose a file” or drag and drop your XLSX file onto the page — no sign-up or email needed.
- 2Convert to CSV
CSV is already selected as the output. Open Options to fine-tune quality if you like, then click Convert.
- 3Download your CSV file
Your CSV file is ready in seconds — click Download to save it. Files are automatically deleted after 24 hours.
XLSX vs CSV
| XLSX | CSV | |
|---|---|---|
| Full name | Microsoft Excel | Comma-Separated Values |
| Type | Spreadsheet | Spreadsheet |
| Compression | Lossless | Lossless |
| Best for | data, calculations and shared spreadsheets | exporting and importing raw data between tools |
Frequently asked questions
Does converting XLSX to CSV lose quality?
Converting XLSX to CSV preserves your text, images and most formatting. Very complex elements — macros, live formulas or unusual fonts — may not carry over perfectly, but the content stays intact.
What's the difference between XLSX and CSV?
Microsoft Excel (XLSX) is lossless and best for data, calculations and shared spreadsheets. Comma-Separated Values (CSV) is lossless and best for exporting and importing raw data between tools. Convert XLSX to CSV when you need a spreadsheet for exporting and importing raw data between tools.
Is the XLSX to CSV converter free?
Yes — converting XLSX to CSV is completely free. There's no watermark, no sign-up and no email required, and you can convert as many files as you like.
Are my XLSX files private and secure?
Yes. Your uploads are encrypted in transit, processed privately, and automatically deleted within 24 hours. We never share, sell or look at your files.
Can I convert XLSX to CSV on iPhone, Android, Mac or Windows?
Yes. The converter runs entirely in your browser, so it works on any device — iPhone, iPad, Android, Mac, Windows or Linux — with nothing to download or install.
How long does it take to convert XLSX to CSV?
Most files convert in a few seconds. Larger files take a little longer, and your upload speed is usually the limiting factor. There's no queue and no waiting for an email.
What else can I convert XLSX files to?
Besides CSV, you can convert XLSX to JSON, ODS, PDF, TSV, YAML and more — see the full list of XLSX conversions below.
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Last updated July 2026