CSV to Excel
Converter
Turn CSV files into real .xlsx workbooks while preserving columns, text encoding, leading zeros, and data structure.
Drag & drop your CSV file here
or click to browse
Supports UTF-8, UTF-16, Shift-JIS, GBK · Comma, Tab, Semicolon delimiters · Max 20MB
Conversion happens entirely in your browser. Your file is never uploaded.
Why use this CSV to Excel converter?
Most tools simply rename your CSV. We actually fix the problems that make your data unreadable.
Protect leading zeros
ZIP codes, IDs, order numbers, and account numbers are kept exactly as-is — no unwanted numeric conversion.
Fix garbled text
Handles UTF-8, Shift-JIS, GBK, UTF-16, and other common encodings so your Chinese or Japanese text stays readable.
Keep columns aligned
Auto-detects commas, tabs, and semicolons. Preview the result before downloading — adjust if anything looks off.
Download a real .xlsx file
Get an actual Excel workbook — not just a renamed CSV — ready for formulas, filters, and frozen headers.
Common CSV problems
Sound familiar?
These are the issues that cause hours of frustration every day. This tool is designed specifically to solve them — automatically, before you even click Convert.
- Dates open incorrectly in Excel
- Leading zeros disappear from ZIP codes and IDs
- Long numbers turn into scientific notation
- Columns split the wrong way
- Japanese or Chinese text becomes garbled
- CSV opens, but it's still not a real Excel workbook
| ID | Name | Amount | Date | Postcode |
|---|---|---|---|---|
| 00123 | Alice Wang | 1.23E+15 | Jan-26 | 0090 |
| 00456 | Bob Zhang | 98765432 | Feb-26 | 0031 |
| 00789 | Carol Li | 112233 | Mar-26 | 0045 |
Step by step
How to convert CSV to Excel
Upload your CSV file
Drag & drop or browse to select your CSV. We automatically detect the encoding and delimiter.
Preview the parsed table
See exactly how your data will look before converting — first 100 rows rendered instantly.
Adjust settings if needed
Switch encoding (UTF-8, Shift-JIS, GBK) or delimiter (comma, tab, semicolon) with one click.
Download the Excel file
Click Convert and download a real .xlsx workbook — ready to open, filter, and share in Excel.
FAQ
Frequently asked questions
Answers about encoding, delimiters, leading zeros, privacy, and common CSV import issues.
Privacy & Security
Your data never leaves your browser
Financial data, employee records, customer information — it all stays on your machine. We built this tool with a local-first architecture because privacy should be the default, not a premium feature.
Processed in your browser
Your file is converted entirely on your device. Nothing is ever uploaded to or stored on a server.
Not used for training
We never use your file contents for any AI training, analytics, or third-party services.
Privacy-first architecture
No login required. No cookies tracking your files. Your data stays where it belongs — with you.