Free · No signup · Browser-based
Validate your CSV.
Drop a CSV and get a quick health check — missing values, type inconsistencies, duplicate rows, blank columns, dodgy headers. All in seconds.
Drop a CSV and get a quick health check — missing values, type inconsistencies, duplicate rows, blank columns, dodgy headers. All in seconds.
Before you load a CSV into a database or send it to a colleague, it pays to know what's actually in it. This validator scans for the most common issues — missing cells, columns that don't have the type they claim, duplicate rows, entirely empty columns, blank or auto-named headers. Each issue is flagged with a severity so you can fix the urgent ones first.
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.