John Butcher

Free online Quartile Calculator. Easily compute Q1, Q2 (median), Q3, Interquartile Range (IQR), and more.

Create a Histogram for free with easy to use tools and download the Histogram as jpg, png or svg file. Customize Histogram according to your choice.

A click counter is a versatile online tool used to keep a tally or count of specific actions, events, or occurrences.

Generate random letters from a to z. Choose between upper case, lower case, or a combination of both.

With bar graph maker you can easily make bar charts online without need to install any software. All can be done online.