CSV reorder columns
Reorder, swap, or drop CSV columns to a target order — by name or index. Runs entirely in your browser, no upload.
About this tool
CSV reorder columns rearranges a CSV's columns to the exact order you want — and drops the ones you leave out.
Give a target order as a comma-separated list of column names (when the first row is a header) or 1-based indices:
city,name→ keep only those two, in that order3,1,2→ reorder by position- repeat a name to duplicate a column
Columns you don't list are dropped. Works with , / tab / ; / |
delimiters.
Privacy
Everything runs in your browser via WebAssembly — your CSV is never uploaded. Also available from the gizza CLI and in chat.
Common uses
- Move the most important columns to the front.
- Drop columns you don't need before sharing a CSV.
- Swap two columns, or reorder to match another file's schema.
FAQ
How do I drop columns I don't want?
Just leave them out of the target order. Only the columns you list are kept — so
with a name,age,city file, entering name,city returns those two columns and
silently drops age. There's no separate "delete column" option; the list is
the output schema.
My CSV has no header row — can I still reorder it?
Yes. Untick the header option and address columns by 1-based position instead:
3,1,2 puts the third column first. An index outside the file's width (e.g. 9
in a 2-column file) is rejected with an out-of-range error rather than producing
empty columns. When a header is present, each entry is matched against the
header names first and only treated as a number if no name matches.
Can I duplicate a column?
Yes — repeat its name or index in the list. name,city,name outputs the name
column twice, which is handy when two downstream systems expect the same value
under different positions.
Does it only work with commas?
No. The delimiter option accepts comma (default), tab, semicolon, pipe, or
any other single character. The same delimiter is used for reading and writing, so
a tab-separated file stays tab-separated.
Developer & Automation Access
Run it from the terminal
Same engine as this page, headless — via the gizza CLI:
gizza tool csv-reorder-columns "name,age,city
Ada,36,London" 'columns=city,name'New to the CLI? Get gizza →
Open it by URL
Pre-fill and auto-run this tool with query parameters — the names match the API/CLI:
https://gizza.ai/tools/csv-reorder-columns/?data=name%2Cage%2Ccity%0AAda%2C36%2CLondon&columns=city%2Cname&header=true&delimiter=%2CMachine-readable descriptor: tool.json — title + parameters JSON Schema for agents.