Here is the free online graphing calculator / bar graph generator to create bar graphs online (Bar graphs / Bar charts). Bar graphs have two axes with either vertical or horizontal bars used to show comparisons between categories of data. A vertical bar chart is called a Line graph. In the below bar graph maker, enter the data for graph title, labels for X and Y axes, number of groups and group names and the data for X and Y axes and click calculate to represent your data as a bar chart.
Bar graph maker / generator is an excellent tool that can be used to create graphs that can compare and represent the changes of data over time.