No. Everything runs locally in your browser.

What is the file size limit?

Process files up to the browser memory limit.

Can I select all at once?

Yes, using the All/None buttons.

Choose which columns to keep. Drag to reorder the output. Securely process files in your browser memory with zero data transf

Your files never leave your device. Processed locally. 100% private.

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Complete your task perfectly in just three straightforward steps.

Drop your CSV or Excel file.

Check the columns you want and drag to reorder.

Download the file with only your chosen columns.

Everything you need to know about the Column Selector.

Continue working with our suite of free data utilities.

Filter CSV rows by conditions on any column. Supports AND/OR logic. The safest way to process sensitive data with zero-upload

Transform wide CSV tables to long format. Convert column headers into row values. Processed entirely in your browser for 100%

Sort CSV rows by one or more columns in ascending or descending order. Fast, private, and secure browser-based tool with no s