CSV Column Extractor
Extract specific columns from a CSV file.
Just the columns you need
A CSV often has more columns than you need for a particular task, and pulling out just the relevant ones makes the data cleaner and easier to work with. This extracts the columns you choose from a CSV, in your browser, so your data stays on your device.
Load a CSV and choose the columns to extract.
Focusing data down
Extracting specific columns is a common first step in working with data, because real datasets are often wide with many fields, most irrelevant to any given task. Pulling out just the columns you care about — a few key fields from a large export, the relevant data for an analysis, the columns another system expects — produces a focused, manageable dataset. It is also a simple privacy measure: sharing only the necessary columns rather than a full export means not passing along fields that are sensitive or irrelevant, which matters when data is going to another person or system. Doing this in the browser keeps the whole dataset local, so even a CSV full of personal or confidential information is trimmed down on your own device without being uploaded, letting you extract exactly what you need while keeping everything else private and under your control.
Questions & answers
Why extract specific columns?
To produce a focused dataset from a wide one — pulling out just the key fields for a task, an analysis, or what another system expects.
Is it a privacy benefit too?
Yes — sharing only the necessary columns avoids passing along sensitive or irrelevant fields, which matters when data goes to another person or system.
Is my data uploaded?
No. The extraction happens in your browser, so the data stays on your device.