Free

Data Type Detector & Analyzer

Analyze CSV columns and detect data types automatically

Browser-onlyNo uploadsInstant

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FAQ

What data types does this tool detect?

The tool automatically identifies text (string), integers, decimals, dates, email addresses, URLs, booleans (true/false), and empty/null values. It also flags mixed-type columns — for example, a column that is mostly numbers but contains some text values — so you can fix inconsistencies before analysis.

Why should I check data types before creating a chart?

Incorrect data types cause silent chart errors. If a date column is stored as text, your time series chart won't sort correctly. If a numeric column contains text values mixed in, aggregations and averages will be wrong. Running type detection first catches these issues before they corrupt your visualization.

Does this tool upload my CSV data to a server?

No. The Data Type Detector runs entirely in your browser using JavaScript. Your file is read locally and never sent to any server. Your data stays completely private on your device.

What's the difference between this tool and the CSV Validator?

The Data Type Detector analyzes what type of data is in each column (number, date, text, etc.) and reports statistics like unique value counts and null percentages. The CSV Validator checks whether your file is structurally valid CSV — consistent column counts, proper quoting, encoding issues. Use both together for thorough pre-analysis data quality checks.

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