Convert CSV to Excel
Turn your CSV file into a properly formatted Excel spreadsheet. This converter handles UTF-8 encoding, quoted fields, embedded commas, and newlines within values. It creates a clean .xlsx file with proper column widths. Everything runs in your browser: your data stays on your device.
Drag and drop your file here
or click to browse. Accepts .csv up to 50 MB.
Your data never leaves your browser. Example: export.csv
How accurate is this? This converter parses your file using deterministic rules (no AI or guessing). The output matches the source data exactly. If you notice any issue, please report it using the link below.
How to Export and Convert CSV Data
- 1
Get your CSV file
Export from your application, database, or spreadsheet program. The file should use commas as delimiters.
- 2
Upload the file here
Drag and drop or click to select your .csv file.
- 3
Review the preview
Check that columns are split correctly and data looks right.
- 4
Download as Excel
Click "Download XLSX" to get a proper Excel file with formatting.
Frequently Asked Questions
- Why convert CSV to Excel instead of just opening it?
- When you open a CSV in Excel directly, Excel guesses data types and silently corrupts your data: it strips leading zeros from IDs and ZIP codes, converts long numbers to scientific notation, and turns date-like strings (like "1-2" or "MARCH1") into dates. This converter preserves every value exactly as it appears in your CSV.
- How do I stop Excel from removing leading zeros in my CSV?
- Use this converter instead of opening the CSV directly. It writes every cell as a text-typed cell in the Excel file, so "007890" stays "007890" and "00042" stays "00042". If you open the CSV directly in Excel, there is no reliable way to prevent this.
- Why does Excel show scientific notation for my IDs?
- Excel converts any number longer than 15 digits to scientific notation (e.g., 1.1E+18) and rounds the trailing digits to zero. This destroys account IDs, UPC codes, and tracking numbers. This converter writes long numeric strings as text cells, preserving every digit.
- Can I open a CSV without Excel changing my dates?
- Not reliably with Excel alone. Excel interprets strings like "1-2", "Jun-26", and "MARCH1" as dates based on your locale settings. This converter preserves all values as literal text, so "1-2" stays "1-2" and "MARCH1" stays "MARCH1".
- Does it handle different encodings?
- The converter reads your file as UTF-8, which covers most modern CSV files. The output Excel file includes a UTF-8 BOM for compatibility.
- What about semicolon-separated files?
- The parser auto-detects common delimiters including semicolons (used in many European countries where the comma is the decimal separator). For tab-separated files, use the TSV to Excel converter.
- Is my data private?
- Yes. The conversion runs entirely in your browser using JavaScript. Your CSV file is never uploaded to any server. You can verify this by disconnecting from the internet: the converter still works.
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This tool is not affiliated with or endorsed by CSV or its parent company. All trademarks belong to their respective owners.