Convert CSV to Excel Online (.xlsx) - Auto-Delimiter Detection
Convert CSV comma, semicolon, tab, and pipe-delimited text files into authentic Microsoft Excel spreadsheets.
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How to Convert CSV to Excel Online in 3 Simple Steps
Convert your data effortlessly with zero installations and complete local privacy.
- 1Step 1:
Upload CSV File
Drag and drop any .csv, .tsv, or text file into the converter box.
- 2Step 2:
Auto-Detect Delimiters
Our engine automatically detects whether your CSV uses commas, semicolons, tabs, or pipes and prepares a preview.
- 3Step 3:
Download Clean Excel File
Save the formatted .xlsx file to your device with proper column data types and header styling.
Frequently Asked Questions About CSV to EXCEL Conversion
Everything you need to know about formats, privacy, and browser-based file conversion.
Does the CSV to Excel converter preserve leading zeros?
Yes! Unlike standard Excel imports that convert postal codes like '01234' to 1234, ConvertSheet explicitly preserves leading zeros as text cells.
What delimiters are supported?
Comma (,), Semicolon (;), Tab (\t), Pipe (|), and custom single-character delimiters are supported with automatic detection.
Can I convert large CSV exports from databases?
Yes. Files up to 10MB convert in under 200ms in your browser. For multi-gigabyte exports, our ConvertSheet Pro tier provides chunked streaming.
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