XLSX to CSV Converter
Convert Excel spreadsheets to CSV in your browser. CSV is ideal when you need data pipelines, exports, and lightweight tabular exchange, while XLSX is better known for formulas, multiple sheets, and rich spreadsheet features.
- Files never uploaded
- Instant, on-device
- Free & no sign-up
Drop XLSX files here, or browse
XLSXCSV · files stay on your device
up to 50 MB per file · up to 20 files per batch
How to convert XLSX to CSV
- Step 01
Add your XLSX file
Drop one or many XLSX files onto the converter, or browse from disk. Stay within the on-device size limits shown under the drop zone — oversized files are rejected so your tab does not freeze.
- Step 02
Run the conversion
Start the XLSX → CSV conversion. Parsing and rendering happen in your browser tab, which keeps contracts and spreadsheets off remote servers.
- Step 03
Download CSV
Download your new CSV file immediately. Multiple outputs pack into a single ZIP archive.
Why convert XLSX to CSV
CSV strips a workbook down to plain delimited rows that databases, Python scripts, and most ETL tools ingest without an Excel license. It is the interchange format for tabular data.
When to use this tool
- You are importing sheet data into a database or analytics tool.
- A teammate needs the numbers without opening Excel.
- You want a durable, simple archive of one table.
Good to know
- Only cell values are kept — formulas, charts, and formatting are dropped.
- Multi-sheet workbooks typically export one logical table at a time.
- Watch locale decimal and delimiter settings if you collaborate internationally.
- Browser limit: about 50 MB per file, up to 20 files per batch. PDFs are capped at 50 pages; large sheets at about 100,000 rows.
- Need a bigger file? For bigger PDFs or workbooks, use Adobe Acrobat, LibreOffice, Microsoft Office, or a desktop batch tool, then convert a trimmed copy here if you only need a quick private pass.
File size limits for XLSX to CSV
Browser limit: about 50 MB per file, up to 20 files per batch. PDFs are capped at 50 pages; large sheets at about 100,000 rows.
Why there is a limit
Documents are parsed and rendered entirely in your browser tab. Oversized PDFs and spreadsheets can exhaust memory, so limits protect the tab while keeping files private.
If your file is too large
For bigger PDFs or workbooks, use Adobe Acrobat, LibreOffice, Microsoft Office, or a desktop batch tool, then convert a trimmed copy here if you only need a quick private pass.
XLSX to CSV FAQ
Common questions about converting XLSX files to CSV.
Is this XLSX to CSV converter free?
Yes. Browser Convert does not charge for XLSX → CSV, add watermarks, or require an account.
What happens to formatting when I convert XLSX to CSV?
Expect a faithful but not always pixel-identical transfer. universal import into databases, scripts, and spreadsheets matter most for CSV, while exotic XLSX features (overkill when you only need a simple data exchange format) may simplify. Always spot-check important pages.
Do I need Microsoft Office or Adobe apps installed?
No. Browser Convert handles XLSX → CSV in the browser without installing desktop software.
Is XLSX to CSV conversion private on Browser Convert?
Yes. Your Excel spreadsheet is processed in the browser. We do not upload the file to convert it, which is the main difference from typical online converters.
Are there file size limits for XLSX to CSV?
Yes. Browser Convert accepts about 50 MB per file, with up to 20 files queued at once. Documents are parsed and rendered entirely in your browser tab. Oversized PDFs and spreadsheets can exhaust memory, so limits protect the tab while keeping files private. If your file is larger, For bigger PDFs or workbooks, use Adobe Acrobat, LibreOffice, Microsoft Office, or a desktop batch tool, then convert a trimmed copy here if you only need a quick private pass.
Can I convert several XLSX files to CSV at once?
Yes. Queue up to 20 XLSX files and convert them in one pass. When finished, download the batch as a ZIP. Very large batches may need to be split so your browser stays responsive.