Excel to CSV Converter
Extract worksheets from Microsoft Excel (.xlsx) files into clean, RFC-compliant CSV or TSV text with custom delimiters and zero server uploads.
Drag & drop your Excel (.xlsx) file here, or browse
Supports modern Microsoft Excel files up to 100 MB
What is an Excel to CSV Converter?
An Excel to CSV converter is a data transformation utility that decompresses Microsoft Excel (.xlsx) workbooks, extracts internal XML sheet structures, resolves shared string tables, and formats tabular data into RFC 4180-compliant comma-separated values. It strips complex spreadsheet overhead, providing clean, raw text suitable for databases, analytical pipelines, and data science workflows.
How to convert Excel to CSV online
- Upload your spreadsheet: Drag your
.xlsxfile into the dropzone or click browse to select a file from your device. - Select sheet and delimiter: If your workbook has multiple sheets, pick your desired worksheet from the sheet dropdown. Choose comma, semicolon, tab, or pipe delimiter.
- Inspect the extracted table: Verify that text headers, numbers, and dates are aligned properly in the live data preview.
- Download or copy: Click Download .csv to save your file or copy the raw CSV text directly to your clipboard.
Why convert Excel to CSV?
| Reason | Excel (.xlsx) Challenge | CSV Advantage |
|---|---|---|
| Database Import | Requires specialized drivers (ODBC/OLEDB) | Native import via COPY or LOAD DATA INFILE |
| Version Control | Binary format; cannot see git line diffs | Plain text; clean line-by-line git tracking |
| File Size | Higher overhead from XML schemas and styles | Up to 80% smaller footprint for numeric datasets |
| API & Machine Learning | High parsing latency in Python / Node.js | Fast zero-copy ingestion in Pandas and Polars |
Need to turn your CSV files into JSON or clean duplicate rows? Check out our CSV to JSON Converter or CSV Cleaner & Formatter.
Frequently asked questions
Can I extract a specific sheet from a multi-sheet Excel file?
Yes. When you load a multi-sheet .xlsx workbook, the tool automatically scans and lists all available worksheet names in a dropdown menu. You can switch between sheets and preview or export each sheet individually.
How does it handle Excel date formulas and numbers?
Numeric values, percentages, and calculated values are extracted cleanly as raw values. Formatted dates are normalized into standard ISO 8601 (YYYY-MM-DD) strings to ensure smooth importing into PostgreSQL, MySQL, SQLite, or Pandas.
Can I export as a Tab-Separated Values (TSV) or pipe-delimited file?
Yes. In the delimiter dropdown, you can select Comma (,), Semicolon (;), Tab (\t), or Pipe (|) to match the exact ingestion specification of your destination platform.
Is any of my spreadsheet uploaded to a remote server?
No. The entire workbook parsing and CSV encoding operation executes 100% locally in your browser memory using client-side JavaScript. Your data remains strictly confidential.
What Excel formats are supported?
The converter supports all modern Microsoft Excel OpenXML files (.xlsx), Excel Macro-Enabled workbooks (.xlsm), and standard spreadsheet export formats created by Excel, Google Sheets, LibreOffice, or Numbers.