Histogram Maker is a free tool for turning a list of numbers into a clear, accurate histogram in seconds, with no software to install and no account to create.
Why it exists
Making a good histogram should be easy, but most tools make you fight with bin settings, hide features behind paywalls or stamp a watermark on the result. Histogram Maker does the statistics for you (sensible bins, a frequency table and summary statistics) and leaves you free to focus on what your data is saying.
What you can do
- Paste raw data or import an Excel or CSV file
- Choose bins automatically with standard rules, or set your own bin width and start
- Make frequency, relative frequency, percent, density and cumulative histograms
- Add a normal curve, frequency polygon, mean and median lines
- Compare up to six data sets on shared bins
- Download PNG, JPG, SVG or PDF up to 4K, or share and embed your histogram
Beyond histograms, the site has free box plot, dot plot, stem-and-leaf and Pareto chart makers, and step-by-step calculators for descriptive statistics, standard deviation, z-scores, normal probabilities, grouped data and correlation.
Who uses it
- Students and teachers for statistics homework, lab reports and lessons.
- Researchers for quick looks at a distribution and publication-ready figures.
- Analysts and businesses for sales, quality control, survey and operations data.
Your data stays with you
Everything runs in your browser. Your numbers and files are never uploaded. See the privacy policy for details.
Have an idea or found a bug? Get in touch. Feedback shapes what gets built next.