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CSV Analyzer

Analyze CSV structure — column types, counts, unique values, and empty cells. Spot malformed rows and mixed types before import. Input never leaves your device — everything runs locally in your browser.

100% Local Browser Native

How to Use the CSV Analyzer

1. Paste source for CSV Analyzer

Paste source for CSV Analyzer into the input area. Nothing runs until you trigger it.

2. Analyze

Analyze and read every finding.

3. Fix and rerun

Fix flagged items and re-run.

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Frequently Asked Questions

What analysis does it perform?

Column types (text, number, date), row count, unique value count, empty/null cell count per column, and data distribution. Identifies data quality issues before analysis.

Can it detect data types automatically?

Yes. The analyzer inspects column values and classifies columns as numeric, text, date, or boolean. This helps determine which columns can be used for calculations vs categories.

Does it show unique values?

Yes. For each column, the analyzer shows the count of unique values and can list them. This identifies cardinality — whether a column has few categories or many unique entries.

Can I use this to validate CSV before import?

Yes. Check for empty cells, unexpected data types, and encoding issues before importing into databases, spreadsheets, or analysis tools.

When using CSV Analyzer, is my CSV data stored?

No. All analysis happens locally in your browser. No CSV data is sent to any server.

Related Utility Tools

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Profile CSV datasets — row counts, column types, null rates, value distributions. Scope data quality before analysis — local parsing, free, no signup.

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Clean messy CSVs — trim whitespace, fix encodings, deduplicate rows, standardize blanks. Make client exports analysis-ready — local processing, free, no signup.

Last updated October 2026