Box Plot by SmartVisuals

The box plot Power BI never shipped: quartiles that agree with your DAX, every unit on the chart, and the statistics that say which groups really differ.

Free, and never blocked

• Quartiles you can state: Excel / DAX PERCENTILE.INC by default, Excel exclusive / Minitab / SPSS and Tukey's hinges. The footnote names the one in use.
• Four whisker rules: 1.5 x IQR (any multiple), percentiles, mean +/- SD, min to max. Outliers and far outliers get different markers.
• Colour by quartile (Q1 to median, median to Q3).
• Every observation: a beeswarm, jitter or strip behind each box; hover a point for its ID, click to filter the report to it.
• Reference lines: mean, median and up to four percentiles, for all data or per group, plus a typed reference line.
• Split By a second field (two levels) for side-by-side boxes; sort by name; hide small groups; horizontal or vertical; log scale.
• Large data: put the value in Value (as column) with a Count measure and each distinct value arrives once.
• A smart caption and a methods footnote.

Readers without a licence always see the free chart: no watermark, no broken report.

Power BI features (free)

• Tooltips: n, median, quartiles, mean, IQR, whiskers and outliers on every box; ID, value and your extra Tooltips fields on every point; report page tooltips supported.
• Highlight and cross-filter: click a box or point to filter the report, Ctrl adds, cross-highlighting from other visuals keeps the whole as a ghost, bookmarks keep the selection, right-click context menu.
• Drilldown on a Group hierarchy (Plant > Line), drill up or expand all; conditional formatting (fx) of the group colour from a rule on the Value.
• Data labels for median, quartiles and mean; a legend for Split By (show, top or bottom position, font size, colour).
• Axes: axis titles, fixed minimum and maximum, log scale, decimals, font size and colour, grid lines, n per group.
• Data point markers with size, opacity and colour, jittering (beeswarm, random jitter or strip), four mean marker shapes, box style and corner radius, a colour per group.
• Responsive: on small tiles the caption, footnote and legend step aside so the boxes keep their room.
• Format on the canvas (on-object formatting).
• Four themes, four fonts, transparent background; localized in 20 languages (format pane, captions, tooltips, announcements).

Accessibility: one keyboard tab stop. Arrow keys, Home / End and Page Up / Down move between boxes with a visible focus outline; Enter or Space filters the report to the focused group, Ctrl adds, Escape clears. A screen-reader live region announces each box's median, quartiles and n, and the chart is labelled with its smart caption. The Accessibility card sets the focus outline colour and width and a minimum text size. Outliers are marked by shape (hollow and filled triangles) and statistic lines by dash pattern, never by colour alone; high-contrast mode uses the system colours. Nothing animates.

Premium: compare and prove (per-user licence)

• Significance between groups: Welch t or Mann-Whitney U, Holm or Bonferroni, Welch's ANOVA, brackets with stars or A / B / C letters.
• Notched boxes and mean confidence intervals.
• Weights (quartiles, means, Welch tests) with Kish effective n, spec limits typed or from measures with Cp, Cpk, Cpl, Cpu and Cpm per group, small multiples.
• Statistics table under the boxes: n, mean, SD, min, Q1, median, Q3, max and the mean and median intervals per group; a second reference line.
• Sort by median, mean, IQR or n; seven more Hyndman-Fan quartile types; Split By with 3+ levels.

Premium previews free in Desktop and edit mode. Statistics run offline, golden-tested against scipy, numpy and statsmodels; no external calls.

Single view or the multi-view?

This is the single-view edition ($1.99 per user per month). SmartVisuals Distribution ($4.49) adds violin, raincloud, ridgeline, beeswarm and histogram views over the same fields, with the same premium layer. Licences do not carry across offers. For box plots alone this one is cheaper; with three or more chart types the multi-view is.

New in 1.1.0.0: drilldown on Group, fx group colours, colour by quartile; premium statistics table and second reference line. Sorting by a statistic, extra quartile types and 3+ Split By levels are now premium; reports created before 1.1.0.0 keep these features.

Documentation: https://smartvisuals.io/visuals/box-plot | Support: https://smartvisuals.io/support#box-plot | Release notes: https://smartvisuals.io/changelog#box-plot