Delete a CSV Column
Quickly delete one or more columns from a CSV file. Runs entirely in your browser, so your data never leaves your device.
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Output
The result appears here as you type.
How to use Delete a CSV Column
- 1. Paste the CSV. Enter the file in the input pane. The tool removes whole columns from every row at once, which is far less error-prone than deleting cells line by line in an editor.
- 2. Name the columns to drop. In 'Columns to delete (names or numbers, comma-separated)' list header names like city,notes or 1-based positions like 3,5. Everything you do not list survives in its original order.
- 3. Set header awareness. Keep First row is header checked when deleting by name so the tool can locate the columns. For headerless files addressed by position, uncheck it so the first line is treated as data.
- 4. Copy the slimmer file. Copy the output pane's result. Row counts are unchanged and the remaining columns keep their relative order, so the file is immediately usable wherever the original was headed.
When to use Delete a CSV Column
Delete a CSV Column strips unwanted fields out of a file in one pass. Exports habitually include ids, timestamps and internal codes nobody downstream needs, and sometimes columns you actively must not share. Listing the offenders by name or number beats opening a spreadsheet just to right-click a few headers.
- Removing personal data before analysis. A usage export includes email and ip_address columns your analysis does not need. Deleting them first means the file you pass around the team never contained the personal data at all.
- Shrinking a file for an upload limit. A 60-column export blows past an import tool's size cap, mostly due to a huge free-text description column. Dropping it cuts the file to a fraction of its size.
- Cleaning auto-generated index columns. pandas and R both love writing an unnamed index column into CSV exports. Delete column 1 by number and the file matches the schema your loader actually declares.
Examples
Drop a column by name
Input
name,age,city Ada,36,London
Output
name,city Ada,London
About the Delete a CSV Column tool
Delete a CSV Column does its work locally, right in the browser. Quickly delete one or more columns from a CSV file. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the CSV Tools collection on EditSafely, a set of 133 small, focused CSV utilities that share the same instant, private workspace.
You can shape the output with 2 settings, including Columns to delete (names or numbers, comma-separated) and First row is header, and the result refreshes the moment you change one. A worked example further down the page shows exactly what the tool produces for a real input.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Does Delete a CSV Column cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.