Free data tools

Quick, single-purpose tools for CSV and spreadsheet data. No sign-up, no upload — everything runs in your browser and your data never leaves your device.

Analyze

CSV Explorer

Drop a CSV and run real analyses — group, distribution, top-N, and more.

Correlation

Pearson correlation between two columns, with a plain-English reading.

Outlier Finder

Flag outliers in a column with the IQR (Tukey) rule.

Summary Statistics

Per-column summary: types, missing values, distinct counts, mean/std/min/max.

Linear Regression

Fit a line to two columns — slope, intercept, R² and p-value.

Convert

CSV to JSON

Convert CSV to JSON, in your browser.

JSON to CSV

Convert a JSON array of records to CSV.

Excel to CSV

Convert .xlsx / .xls spreadsheets to CSV.

Want to just ask in plain English?

The full workbench lets you ask a question and composes these building blocks for you, then writes the report. Same privacy: it all runs in your browser.

Open the workbench →