# Local data charts — distributions & correlations, no upload

> Explore a table with value counts, histograms, a correlation heatmap, and crosstabs — no upload and no chart CDN. Runs entirely in your browser.

Explore a table with top value counts, histograms, a Pearson correlation heatmap for numeric fields, and crosstabs of two categorical columns — without uploading the data or loading a chart CDN.

Before formal analysis, a few quick charts reveal a dataset's shape — which categories dominate, how a number is distributed, which fields move together. This tool gives you those views instantly and privately.

The correlation heatmap is a fast way to spot relationships worth investigating. Profile the data first with the Data profiler, then slice it with SQL or Filter.

## How to

1. **Add a file.** Drop the CSV or table to explore.
2. **Pick columns.** Choose fields for counts, histograms, or a crosstab.
3. **Read the charts.** See distributions and the correlation heatmap.

## FAQ

### What charts can I make?

Value counts and histograms for single columns, a Pearson correlation heatmap across numeric fields, and a crosstab between two categorical columns.

### Do I need a spreadsheet or BI tool?

No. It's a quick exploratory view built into the browser — ideal for a first look at a dataset before deeper analysis.

### Is my data uploaded to chart it?

No. Charts render locally with no external chart CDN, so the data stays on your device.


## Related tools

- [Schema profile](https://www.safepaper.app/data/profile)
- [SQL query](https://www.safepaper.app/data/sql-query)
- [Filter rows](https://www.safepaper.app/data/filter)
- [Series generator](https://www.safepaper.app/data/generate-series)

---

Canonical HTML: https://www.safepaper.app/data/charts
Markdown: https://www.safepaper.app/data/charts.md

There is no upload endpoint — your files are processed in this browser tab. Open your network tab and check.