Convert CSV and Excel files locally — easy and free
Online or offline, 免费 tools that stay on your device.
Convert comma, semicolon, or tab separated files to polished Excel workbooks in one click.
Drop CSV files here or click to select
No files selected yet.
Extract worksheets, tidy them up, and save to CSV with custom separators.
Drop XLSX files here or click to select
No files selected yet.
Convert CSV to Excel (XLSX) and vice versa instantly in your browser. No upload, 100% local processing preserves your data privacy.
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This browser-based tool is designed to be fast, easy to use, and private by default. Open the tool, adjust the settings, and get results instantly without creating an account or sending files to a server.
Everything runs locally in the browser whenever possible, which reduces friction for users and makes the page more useful as a direct-answer landing page from search.
The following topics are closely related to this tool and help explain what it is for:
No. CSV/XLSX conversion happens locally in your browser.
Yes: CSV→XLSX and XLSX→CSV are supported.
You can auto-detect or set a delimiter, and choose character encoding before converting.