CSV to Excel Converter

A CSV to Excel converter turns comma, tab, semicolon, or pipe-separated text into a formatted .xlsx workbook, entirely in the browser, with nothing uploaded to a server.

Accepted input covers .csv, .tsv, and .txt files, or CSV content pasted directly. The delimiter is auto-detected, with comma, tab, semicolon, and pipe available as a manual override when detection does not match the source. The worksheet name defaults to "Sheet1" and is capped at 31 characters, the limit Excel itself enforces on sheet names; the output filename is set separately and does not need the .xlsx extension, which is added automatically.

Marking the first row as a header formats it with bold styling in the output spreadsheet rather than treating it as a data row. Trimming removes leading and trailing whitespace from every cell during conversion. Automatic number detection recognizes fractions such as 3/4, mixed numbers such as 5 1/2, decimals, and scientific notation such as 1.5e3, and writes them as real Excel number cells rather than text, so formulas and pivot tables built on the output work immediately.

Conversion produces a preview of the first 100 parsed rows before the file downloads, so a mismatched delimiter or a missed header row is visible before committing to the download.

Auto-detection scans the first five lines outside of quoted strings and picks the most frequent of comma, tab, semicolon, or pipe as the delimiter. Quoted fields handle escaped double quotes and preserve embedded delimiters or newlines. When number detection is enabled, the parser recognizes integers, decimals, scientific notation, fractions such as 3/4, and mixed numbers such as 5 1/2, converting them to native Excel cells so formulas and pivot tables work immediately on the output. Headers are bold when the first row is marked as a header, and column widths size automatically up to 50 characters.

Apply the CSV to Excel converter wherever raw exports need to become spreadsheet-ready. Convert reports, catalogs, analytics dumps, and database query results into XLSX files that open cleanly in Excel and other modern spreadsheet tools, with custom sheet names and formatted headers ready for further work.

• Business Reporting: Convert exported sales reports, financial summaries, or CRM data from CSV format into Excel spreadsheets for presentation to stakeholders. Custom sheet names organize multi-report downloads.
• E-commerce: Transform product catalog exports into Excel files for inventory review, price adjustments, or bulk editing before re-import to your storefront.
• Data Analysis: Prepare raw CSV datasets for analysis in Excel with automatic number detection enabled. Numeric columns become real numbers, enabling immediate use of formulas and pivot tables.
• Education: Convert grade books, student rosters, or survey results exported from learning management systems into Excel format for further processing, charting, or submission to administrative systems that require XLSX input.
• Database Administration: Export query results from database tools as CSV and convert them to Excel for sharing with non-technical team members who are more comfortable working with spreadsheet software.
• Marketing: Convert analytics exports, ad platform reports, or email campaign data into Excel format for creating dashboards, charts, and performance summaries with formatted headers.
• Human Resources: Transform employee data exports, time tracking logs, or payroll CSV files into Excel spreadsheets for review, approval workflows, or archival in standardized formats.