What Is an Excel to CSV Converter?
An Excel to CSV converter transforms spreadsheet data into plain-text comma-separated values. You can paste tab-separated data copied from Excel, upload a .xlsx file, upload a .csv/.tsv text file, or import from a URL. CSV is the universal data exchange format — supported by databases, programming languages, spreadsheet apps, and data tools. This tool runs 100% in your browser — your data is never uploaded to any server.
It supports pasting from Excel, .xlsx file parsing with multi-sheet workbooks, multiple input delimiters with auto-detection, configurable output delimiters, header row toggle, data preview, copy to clipboard, and instant download.
How to Use This Tool
Add Your Data
Copy cells from Excel and paste into the input area (they arrive as tab-separated text). Or click Upload for a .xlsx/.csv file, drag and drop, or use URL Import.
Configure & Convert
Set the input delimiter if auto-detection doesn't match, toggle header row on or off, then click Convert to CSV to generate the output.
Choose Output Format
Select your preferred output delimiter (comma, tab, semicolon, or pipe). If you uploaded a .xlsx with multiple sheets, pick the sheet you need.
Copy or Download
Copy the converted CSV to your clipboard or download it as a .csv file. Review the preview table to verify the data looks correct.
Features Explained
Paste from Excel
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Copy cells in Excel (or Google Sheets, LibreOffice Calc) and paste directly into the input area. The clipboard data arrives as tab-separated text, which the tool auto-detects and converts to your chosen output delimiter.
XLSX File Upload
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Upload a .xlsx file to parse it directly in your browser. The built-in XLSX parser reads the ZIP structure, shared strings, and sheet XML without any external libraries or server-side processing.
Multi-Sheet Support
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If your Excel workbook contains multiple sheets, a dropdown appears letting you switch between them. Each sheet is parsed independently and can be exported as its own CSV file.
Multiple Delimiters & Auto-Detection
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Supports comma, tab, semicolon, pipe, and colon as input delimiters. When set to Auto, the tool scans the first line and picks the most likely separator. Tab is automatically detected when pasting from Excel.
File Upload & Drag-and-Drop
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Upload .xlsx, .csv, .tsv, or .txt files using the Upload button, or drag and drop a file directly onto the input area. XLSX files are parsed as spreadsheets; text files are loaded into the textarea.
URL Import
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Click URL Import to fetch a CSV file from any remote address. The request goes directly from your browser to the target server — no intermediary.
Output Delimiter Selection
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Choose from comma, tab, semicolon, or pipe as the output delimiter. This is useful when your data contains commas (use tab or semicolon) or when importing into European tools that expect semicolons.
Data Preview
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After converting, the first 50 rows are displayed in a scrollable table so you can verify the data was parsed correctly before exporting. The first row is highlighted when header row is enabled.
Copy & Download
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Copy the entire converted CSV to your clipboard with one click (shows Copied! for 1.5 seconds), or download it as a .csv file. XLSX uploads use the sheet name as the filename.
Smart Quoting
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Cells containing the delimiter character, double quotes, or newlines are automatically wrapped in double quotes with proper escaping. This ensures the CSV output is always valid.
LocalStorage Persistence
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Your pasted input, generated output, and all settings are automatically saved to your browser's local storage. If you close the tab or refresh the page, your data will be restored.
Who Is This Tool For?
Data Analysts
Convert Excel exports to CSV for importing into Python, R, SQL databases, or data visualization tools.
Developers
Extract spreadsheet data as CSV for seeding databases, processing in scripts, or loading into applications.
Database Administrators
Convert Excel reports to CSV for bulk importing into databases using LOAD DATA or COPY commands.
Business Users
Convert Excel data from colleagues into CSV for tools that don't support .xlsx natively.
Students & Researchers
Transform survey data or research datasets from Excel to CSV for statistical analysis software.
System Administrators
Convert user lists, configuration data, or audit logs from Excel to CSV for scripting and automation.
Supported Delimiters
| Format | Delimiter | Common Extensions | Auto-Detected |
|---|---|---|---|
| Excel paste | \t (tab) | clipboard | Yes |
| CSV | , (comma) | .csv | Yes |
| TSV | \t (tab) | .tsv, .txt | Yes |
| SSV | ; (semicolon) | .csv (EU) | Yes |
| PSV | | (pipe) | .psv, .txt | Yes |
| Colon-separated | : (colon) | .txt | Yes |
| XLSX | binary | .xlsx | Parsed |
Tips for Excel to CSV Conversion
Paste directly from Excel
Select cells in Excel, press Ctrl+C, then paste into the input area. The data arrives as tab-separated values which are auto-detected and converted.
Use tab delimiter for data with commas
If your data contains commas (e.g., addresses, descriptions), switch the output delimiter to Tab to avoid quoting issues in downstream tools.
Check the right sheet
When uploading .xlsx files with multiple sheets, make sure you've selected the correct sheet before copying or downloading the CSV.
Verify the preview
Always check the preview table before exporting. Look for missing data, shifted columns, or unexpected values that might indicate a parsing issue.
Watch for date formatting
Excel stores dates as serial numbers internally. If dates appear as numbers in .xlsx output, re-save the Excel file with text-formatted date columns before converting.
Re-upload to refresh
If you modify the Excel file and want to re-convert, just click Upload or drop the file again. The tool resets and parses the new version.
Privacy & Security
This tool runs 100% in your browser. Your data is never uploaded to any server. All parsing and conversion happens locally using JavaScript.
Your input and output are saved only in your browser's local storage so they persist when you refresh the page. You can clear them at any time using the “Clear” button. No cookies are used, no analytics track your data content, and no third-party services have access to what you convert.