A QUICK WALKTHROUGH
How to use this tool
- Load a CSV and select its parsing options.
- Load the column controls, then uncheck unwanted fields, edit header names or use the move buttons.
- Apply the changes and inspect the output schema before downloading.
How it works
Column selection uses original field positions, not guesses based on content. Reordering moves every row’s matching field with its header. Output names must be nonempty and unique. The resulting file uses the selected input delimiter and preserves all accepted records.
A practical example
Start with
id,name,city 00123,Ada,Lahore
What to expect
Keep name then id → name,id Ada,00123
Important considerations
Renaming a header does not transform the field values underneath it. After changing the input, reload the column controls rather than reusing a previous schema.
5 MiB per input · 50,000 records · 200 columns. Input remains in page memory until you reset or leave. Copy and download actions are initiated by you. No tool input is sent to a processing service.
One more useful detail
Can I remove every column?
No. A table with no columns cannot produce a useful CSV output. Keep at least one.