Free Visual Tools

Visual Statistics Tools

Free, browser-based visual tools for every statistics concept — from box plots and bell curves to probability trees and regression diagrams. No installation, no account required.

Descriptive Statistics Tools

Visualize the shape, spread, and center of your data

Beginner

Box Plot Generator

Create box-and-whisker plots showing median, quartiles, IQR, and outliers for any dataset. Perfect for comparing distributions across groups.

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Chart & Visualization Tools

Build publication-ready charts from your data in seconds

Beginner

Bar Chart Maker

Create vertical and horizontal bar charts for categorical data comparisons. Label axes, add titles, and download as PNG or SVG.

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Hypothesis Testing & Inference Tools

Visualize critical regions, p-values, errors, and test power

Intermediate

Rejection Region Diagram Maker

Visualize one-tailed and two-tailed rejection regions on a normal or t-distribution. Set α, critical values, and test statistic to see exactly where your result falls.

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Distributions

Explore and graph every major probability distribution interactively

Beginner

Bell Curve Generator

Graph any normal distribution by setting μ and σ. Shade areas under the curve, display the 68–95–99.7 rule, and export a print-ready bell curve diagram.

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Regression & Correlation

Visualize relationships, fit lines, and diagnose model assumptions

Intermediate

Regression Line Scatter Plot

Enter X–Y data to plot a scatter diagram with the fitted least-squares regression line. Displays equation ŷ = b₀ + b₁x, R², and Pearson r alongside the graph.

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Educational Diagram Tools

Visual diagrams that make core probability and statistics concepts click

Beginner

Probability Tree Diagram Maker

Build multi-stage probability trees with automatic branch probability calculation. Displays all outcomes, path probabilities, and multiplication rule steps at each node.

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Reference & Table Tools

Quick-lookup tools for everyday statistics tasks and test selection

Beginner

Z-Score to Percentile Converter

Convert any z-score to a percentile rank instantly — and reverse-convert a percentile to its z-score. Shows position on the bell curve with a shaded area diagram.

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