TheJIT Box and Whisker Plot Maker

Create box plots with explicit TI-84, Tukey, or Excel/R quartiles, visible outlier fences, and a show-your-work export.

Open the live Box and Whisker Plot Maker

What it does

• Choose exclusive TI-84/Moore–McCabe, inclusive Tukey, or Excel/R type-7 quartiles.

• Use Tukey 1.5× IQR whiskers or minimum-to-maximum whiskers.

• Keep mild and extreme outliers in the table, chart, and evidence pack.

• Include the five-number summary inside the exported SVG or PNG.

• Paste CSV, TSV, semicolon-separated, or pipe-separated text.

• Keep the latest draft in this browser, or save and reopen a local project.

• Export watermark-free SVG and 1×, 2×, 4×, or 6× PNG.

• Copy SVG, create a URL-fragment share link, or download the evidence ZIP.

• Add a source note without sending source rows to a chart service.

Privacy by architecture

Parsing, calculation, SVG layout, autosave, share-link encoding, and export run in the current browser tab. The production modules in src/ have no dataset upload endpoint, telemetry call, account system, or third-party chart runtime.

URL-fragment sharing is not encryption. Anyone who receives a link can read the encoded data, so use a local project file for sensitive or large datasets.

Source layout

• src/lab-core.js — defensive table parsing, safe SVG helpers, and export.
• src/stats-core.js — shared parser, summaries, quartiles, bins, stems, and renderer.
• src/stats-app.js — autosave, local projects, URL fragments, and evidence exports.
• src/wp-lab.css — the production Visual Lab interface styles.
• SOURCE_MANIFEST.json — SHA-256 hashes of the production-derived modules.

The files in src/ are copied from Visual Lab 0.12.1; the manifest lets you compare a published repository with the matching release package.

Run the demo

Serve the repository over localhost so browser modules can load:

python3 -m http.server 8000 --bind 127.0.0.1

Then open http://127.0.0.1:8000/demo/.

Test

npm test

The calculation tests have no package dependencies.

Deliberate limits

The shared statistics engine accepts one to four groups and up to 10,000 expanded observations. It does not add violin, notched-box, stacked-histogram, or decorative jitter modes.

License

MIT