Will my dates and numbers be correctly recognized in Excel?

The converter transfers data as text by default. In Excel, you may need to select date columns and use 'Text to Columns' or format cells to convert text dates to proper date format. Numbers generally auto-convert.

My CSV uses semicolons instead of commas — will it work?

Yes. The converter auto-detects common delimiters (comma, semicolon, tab, pipe). If detection fails, you can specify the delimiter manually.

Will my CSV data fit on one Excel sheet?

Excel supports up to 1,048,576 rows per sheet. If your CSV exceeds this, data may be truncated. For large datasets, consider splitting the CSV first.

Can I add formulas after converting to XLSX?

Yes — that's the main reason to convert. Once in XLSX, you have the full Excel formula library (SUM, VLOOKUP, INDEX/MATCH, etc.), pivot tables, charts, and conditional formatting.

Why does my data from Shopify/HubSpot/Salesforce look messy in CSV?

CRM and SaaS exports often include special characters, embedded newlines, or inconsistent quoting. The converter handles standard RFC 4180 CSV. Minor formatting issues are normal and can be cleaned up in Excel after import.

Can I convert a large CSV (100MB+) to Excel?

Very large CSVs may be slow to process in the browser. For files over 50 MB, consider splitting the CSV first or using Excel's built-in CSV import (Data → Get External Data → From Text/CSV) for better handling.

Is my CSV data uploaded to a server?

No. All conversion happens in your browser. Your data — which may contain sensitive business information — never leaves your device.

📄 Document Converter

CSV to Excel (XLSX) Converter — Free & Private

CSV is raw data — no formatting, no formulas, no data types. Every database, SaaS platform, CRM, and analytics tool exports CSV. Converting to XLSX unlocks Excel's full power: formulas, pivot tables, conditional formatting, charts, and proper column types. No upload, no account needed.

⚡ Convert CSV to Excel Now Browse All Tools

✓ Free forever ✓ No upload ✓ Auto-detects delimiter ✓ Instant

📊

Turn flat data into a real spreadsheet

Auto-detects comma, semicolon, tab, and pipe delimiters · 100% browser-based

Start Converting →

CSV vs XLSX — What Changes When You Convert

CSV: Plain Text

CSV is a flat text file — commas separate values, newlines separate rows. No formatting, no data types, no formulas. Opens in any text editor.

XLSX: Full Spreadsheet

XLSX is a zipped XML workbook. Supports 1M+ rows, cell formatting, multiple sheets, formulas, charts, pivot tables, and metadata.

Upload Your CSV

Drop your CSV file. The converter auto-detects comma, semicolon, tab, or pipe delimiters. Stays local in your browser.

Download XLSX

Your Excel file downloads instantly. Open in Excel, Google Sheets, or LibreOffice Calc to add formulas and formatting.

Why Convert CSV to Excel?

📊 Unlock formulas & pivot tables — SUM, VLOOKUP, INDEX/MATCH, and pivot analysis are impossible in raw CSV
🎨 Add formatting & conditional rules — highlight cells, colour-code data, and apply number formats (currency, dates, percentages)
📈 Build charts instantly — Excel's chart wizard works only on XLSX, not raw CSV text
🔍 Filter and sort properly — Excel's AutoFilter and data type–aware sorting only work in XLSX
🔒 100% private — business data, customer lists, and financial exports never leave your device
🆓 Free forever — no subscription, no watermarks, no row limit

Features

🔍

Auto-Delimiter

Detects comma, semicolon, tab, and pipe automatically.

📊

Excel-Ready

Output opens directly in Excel, Google Sheets, LibreOffice.

🔒

100% Private

All processing is local. Business data never leaves your browser.

⚡

Instant

Conversion completes in seconds for typical CSV exports.

🆓

Free

No account, no fee, no row limits, no watermarks.

📱

Any Device

Works on phone, tablet, and desktop equally well.

Frequently Asked Questions

The converter transfers all data as text by default, which is the safest approach. Numbers typically auto-convert when Excel opens the file. For date columns, you may need to select the column in Excel and use Data → Text to Columns, or format cells to convert the text representation to a true Excel date value.

Yes. The converter auto-detects the most common delimiters: comma (,), semicolon (;), tab (\t), and pipe (|). Semicolon-delimited CSVs are the default export format in many European locales and are handled automatically. If auto-detection fails, you can specify the delimiter manually before converting.

Excel supports up to 1,048,576 rows and 16,384 columns per sheet. Most CSV exports from SaaS tools, CRMs, and analytics platforms fit comfortably within these limits. For very large datasets that exceed the row limit, consider splitting the CSV into multiple files before converting.

Yes — and that's the primary reason to convert from CSV to XLSX. Once your data is in Excel format, you have access to the full Excel formula library: SUM, AVERAGE, VLOOKUP, INDEX/MATCH, COUNTIF, and hundreds more. You can also add pivot tables, charts, slicers, and conditional formatting rules.

CRM and SaaS platform exports often include special characters (commas inside field values, curly quotes, encoded HTML entities), embedded newlines within cells, or inconsistent quoting around text fields. The converter handles standard RFC 4180 CSV parsing. Minor formatting irregularities are common and can be cleaned up in Excel using Find & Replace or Power Query after importing.

Very large CSVs can be slow to process in the browser because all computation runs in your browser's JavaScript engine. For files over 50 MB, consider splitting the CSV into smaller chunks first. Alternatively, use Excel's native import wizard (Data → Get External Data → From Text/CSV), which handles large files more efficiently through native code.

No. All conversion runs locally in your browser. Your data — which may contain customer records, financial figures, inventory data, or other sensitive business information — is never transmitted to any server. This is especially important for GDPR compliance and for handling personally identifiable information (PII).