What is the file size limit?

Process files up to the browser memory limit.

Maximum number of parts?

Unlimited — all parts or limit to a maximum.

Split one CSV column into multiple columns by delimiter, position, or regex. Securely process files in your browser memory wi

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

Unlocking Tool Engine...

Complete your task perfectly in just three straightforward steps.

Drop your CSV file.

Select the column and specify the delimiter or fixed widths.

Download the CSV with the split columns.

Everything you need to know about the Column Splitter.

By delimiter or fixed width?

Both modes are supported.

How are new columns named?

Name them or use default names.

Is my file uploaded?

No. Everything runs locally in your browser.

Continue working with our suite of free data utilities.

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

Split a large CSV into smaller files by row count, column value, or file size. The safest way to process sensitive data with

Merge multiple CSV files with the same structure into a single file vertically. Processed entirely in your browser for 100% d

Perform SQL-style JOINs on two CSV files using a common key column. Fast, private, and secure browser-based tool with no sign

Combine two or more CSV columns into one with a custom separator. The safest way to process sensitive data with zero-upload,

Create pivot tables from CSV data with drag-and-drop rows, columns, and values. Processed entirely in your browser for 100% d