XLS to CSV Converter
Convert legacy Excel spreadsheets to CSV in your browser. CSV is ideal when you need data pipelines, exports, and lightweight tabular exchange, while XLS is better known for opens older Office spreadsheets.
- Files never uploaded
- Instant, on-device
- Free & no sign-up
Drop XLS files here, or browse
XLSCSV · files stay on your device
up to 50 MB per file · up to 20 files per batch
How to convert XLS to CSV
- Step 01
Add your XLS file
Drop one or many XLS 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 XLS → 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 XLS to CSV
XLS (legacy Excel workbook) shines when archives and files created in older Microsoft Excel versions, yet many handoffs demand CSV because universal import into databases, scripts, and spreadsheets. This XLS to CSV tool reshapes the file for that next step without an Office install or an upload queue. Processing stays on your device, which matters for contracts, exports, and anything you would not drop into a random website.
When to use this tool
- A tool, form, or teammate asked for CSV, but you only have XLS.
- You are optimizing for data pipelines, exports, and lightweight tabular exchange instead of staying in XLS.
- You need CSV’s strengths (universal import into databases, scripts, and spreadsheets) for sharing, archiving, or importing data.
Good to know
- Output characteristics follow CSV: universal import into databases, scripts, and spreadsheets.
- Source quirks still apply — XLS is limited by outdated container with weaker compatibility than XLSX, and conversion cannot invent missing data.
- Complex layouts, macros, or embedded media may simplify — skim the result before sending anything final.
- 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 XLS 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.
XLS to CSV FAQ
Common questions about converting XLS files to CSV.
Is this XLS to CSV converter free?
Yes. Browser Convert does not charge for XLS → CSV, add watermarks, or require an account.
What happens to formatting when I convert XLS to CSV?
Expect a faithful but not always pixel-identical transfer. universal import into databases, scripts, and spreadsheets matter most for CSV, while exotic XLS features (outdated container with weaker compatibility than XLSX) may simplify. Always spot-check important pages.
Do I need Microsoft Office or Adobe apps installed?
No. Browser Convert handles XLS → CSV in the browser without installing desktop software.
Is XLS to CSV conversion private on Browser Convert?
Yes. Your legacy 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 XLS 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 XLS files to CSV at once?
Yes. Queue up to 20 XLS 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.