Is this tool completely free?

Yes, this tool is 100% free to use with no hidden costs, trials, or subscriptions required.

Do I need to register or sign up?

No registration or sign-up required. Simply use the tool directly in your browser.

No, all processing happens locally in your browser. Your data never leaves your device, ensuring complete privacy.

Yes, once loaded, many features work offline thanks to Progressive Web App technology.

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.

CSV reading options

Character encoding

Delimiter detection Auto detect Use custom

Trim whitespace around cells

Skip empty rows

Sheet name

Extract worksheets, tidy them up, and save to CSV with custom separators.

Drop XLSX files here or click to select

No files selected yet.

Excel export options

Worksheet

Delimiter

Line endings

Include UTF-8 BOM

Trim whitespace around cells

Skip empty rows

Everything happens in your browser. Large files stay private, offline, and secure.
Not sure about encoding? Try auto-detect first; switch encodings if characters look off.
Workbooks with multiple sheets let you preview and export any tab independently.
Keyboard shortcuts: Ctrl+O (open file), Ctrl+Enter (convert), Ctrl+R (reset), Ctrl+T (toggle theme).
Drag and drop multiple files for batch processing. Maximum file size: 50MB.