Convert CSV to XLSX
Converting from: CSV
Converting to: XLSX
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How to convert CSV to XLSX
Drop your CSV file into the box above, or click to browse.
Other Streets converts it to XLSX instantly, right in your browser.
Download your XLSX file — done.
About CSV
CSV (Comma-Separated Values) stores tabular data as plain text, with each line representing a row and commas separating columns.
The universal format for importing and exporting data between databases, spreadsheets, and analytics tools.
CSV has no official standard until RFC 4180 was published in 2005, decades after the format was already widely used.
💡 Despite the name, CSV files can technically use semicolons, tabs, or other delimiters instead of commas.
About XLSX
XLSX is Microsoft Excel's spreadsheet format, storing rows, columns, formulas, and formatting in a compressed XML archive.
The standard choice for budgets, data tables, and anything requiring formulas or multiple sheets.
A single XLSX sheet can hold over 1 million rows and more than 16,000 columns.
💡 Excel's grid limit was only 65,536 rows until 2007. The modern 1,048,576-row limit is exactly 2^20.
Frequently asked questions
How do I convert CSV to XLSX?
Upload your CSV file above, and Other Streets converts it to XLSX instantly in your browser, no software to install and no waiting.
What's the difference between CSV and XLSX?
CSV and XLSX serve different purposes. CSV has no official standard until RFC 4180 was published in 2005, decades after the format was already widely used. A single XLSX sheet can hold over 1 million rows and more than 16,000 columns.
Is converting CSV to XLSX free?
Yes. Every conversion on Other Streets, including CSV to XLSX, is completely free with no limits or hidden fees.
Can I convert multiple CSV files to XLSX at once?
Yes. You can upload as many CSV files as you want and convert them all to XLSX in the same batch.