CSV to Excel Converter
Convert CSV (Comma Separated Values) files into formatted Excel spreadsheets (.xlsx / .xls) instantly.
Drop CSV file(s) here or click to browse
Convert CSV, TSV, or delimited text files into formatted Microsoft Excel (.xlsx / .xls) spreadsheets instantly.
What does CSV to Excel Converter do?
To convert a CSV file to Excel (.xlsx or .xls), upload your .csv or .tsv file to ReadyForFile's free online CSV to Excel converter. Select your preferred delimiter (comma, semicolon, tab, pipe) and output format (.xlsx or .xls), then click 'Download Excel'. ReadyForFile processes the conversion 100% locally in your web browser with zero server uploads, preserving 100% data privacy.
About CSV to Excel Converter
Convert CSV data, log files, and data exports into fully formatted Microsoft Excel (.xlsx / .xls) workbooks online for free. Custom delimiter support (comma, semicolon, tab, pipe), header detection, and multi-sheet batch conversion. All processing runs 100% locally inside your web browser with zero server uploads.
Features & Capabilities
- Instant client-side CSV to Excel (.xlsx / .xls) conversion
- Supports Comma (,), Semicolon (;), Tab (\t), and Pipe (|) delimiters
- Batch mode: Combine multiple CSV files into one multi-sheet Excel workbook or download individual files
- Auto-detects numbers, dates, booleans, and text cell formats
- 100% private: Zero server uploads
Common Scenarios & Use Cases
- Converting sales reports, bank statements, and accounting CSV exports into editable Excel spreadsheets
- Combining multiple monthly CSV report files into a single Excel workbook with multiple tabs
- Fixing CSV delimiter encoding issues (e.g. European semicolon CSVs) into clean Excel files
- Preparing data for charts, pivot tables, and formulas in Microsoft Excel or Google Sheets
How to Use CSV to Excel Converter
Upload CSV File(s)
Drag and drop your .csv, .tsv, or text files into the upload dropzone, or click to browse.
Configure Delimiter & Format Options
Choose delimiter (auto-detect, comma, semicolon, tab) and output format (.xlsx or .xls).
Download Excel Workbook
Click 'Download Excel' to save your formatted spreadsheet instantly to your device.
Frequently Asked Questions
Is my CSV data uploaded to any external server?
No. ReadyForFile executes all CSV parsing and Excel generation 100% locally in your web browser using JavaScript. Your sensitive financial, customer, or business data never leaves your computer.
How do I convert CSV to XLSX or XLS?
Upload your .csv file, select Excel Workbook (.xlsx) or Excel 97-2003 (.xls) under Excel Output Format, and click Download Excel.
Does this tool support European CSV files with semicolon (;) delimiters?
Yes! You can select Semicolon, Tab, Pipe, or Auto-detect in the options bar to cleanly parse European formatted CSV files.
Can I combine multiple CSV files into one Excel workbook?
Yes! In Batch Mode, uploading multiple CSV files creates an Excel workbook with each CSV file converted into a separate worksheet tab.
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