Free · No signup · Browser-based
Remove duplicate rows from a CSV.
Drop a CSV, pick which columns count for matching (or all of them), and download a deduped file. See exactly how many rows you dropped.
Drop a CSV, pick which columns count for matching (or all of them), and download a deduped file. See exactly how many rows you dropped.
Duplicate rows creep into exports all the time — failed syncs, double-clicks, merged sources. This tool drops them. By default it considers every column for matching, so two rows have to be identical to be deduped. Untick columns you don't want included (e.g. timestamps that may differ on otherwise-identical rows).
Drag from Finder, click to choose, or paste data directly into the input pane.
Tool controls appear above the output. Tune them and watch the result update live.
Download the cleaned-up file, or click 'Build dashboard' to see what's actually in your data.
Every other CSV utility online makes you upload your file and wait. Ours runs in your browser, instantly, and surfaces what's interesting in the data while it's at it.
Parsed locally — open DevTools → Network and you'll see zero requests when you drop a file.
Tool runs as you change parameters. No 'Convert' button to wait on.
Below the output, a strip tells you what's actually in the data — concentrations, outliers, suggested chart.
If the data made you curious, hit 'Build full dashboard' and it opens in our visualization tool.