Insert CSV Columns
Insert new columns at a specific position.
Input CSV
Options
Output CSV
What It Does
Insert columns into CSV rows at the chosen index.
Common Use Cases
- Prepends metadata ahead of existing columns
- Aligns CSV exports with expected field order
- Adds filler columns before transformation
How to Use
- Paste CSV input into the panel
- Provide new column values and the insert position
- Copy the updated CSV from the right panel
Features
- Position control (1 = beginning)
- Delimiter, quote, comment helpers
- Skip empty rows option
Examples
Below is a representative input and output so you can see the transformation clearly.
name,age,city Ada,36,London Lin,29,Berlin
name,role,age,city Ada,admin,36,London Lin,editor,29,Berlin
Edge Cases
- Very large inputs may take a few seconds to process in the browser. If performance slows, split the input into smaller batches.
- Mixed formatting (tabs, line breaks, or inconsistent delimiters) can affect output. Normalize spacing first if needed.
- Insert CSV Columns follows the selected options strictly. If the output looks unexpected, re-check option settings and input format.
Troubleshooting
- Output looks unchanged: confirm the input contains the pattern this tool modifies and that the correct options are selected.
- Unexpected characters: check for hidden whitespace or encoding issues in the input and try normalizing first.
- Slow processing: reduce input size or try a modern browser with more available memory.
Frequently Asked Questions
Is my input stored or logged?
No. This tool is designed to run in your browser, and we do not store or log your content during processing.
Is conversion instant?
Yes for most inputs. Output updates immediately, and large inputs may take a moment depending on your device.
Can this handle large text?
It can handle large text, but performance depends on your browser and device. For very large files, consider splitting the input.
Does it support mobile?
Yes. The interface is responsive and works on phones and tablets, so you can use it on the go.
Can I use it for commercial projects?
Yes. You are free to use the output in personal or commercial projects without attribution.
Does this affect numbers or punctuation?
Only if the selected options target them. Otherwise, numbers and punctuation are preserved as-is.