For bar, line, and pie charts, enter one data point per line using "Label, Value" format β for example "January, 120". For scatter plots, enter X and Y coordinates separated by a comma, such as "10, 45". Empty lines and extra spaces are ignored.
Three formats are supported: (1) Array of objects with name/label/key + value fields β e.g. [{"name":"A","value":10}]; (2) A plain key-value object β e.g. {"Jan":120,"Feb":200}; (3) An array of two-element arrays β e.g. [["A",10],["B",20]]. The "Auto Detect" mode inspects the structure and picks the best chart type automatically.
No. All chart rendering is done entirely in your browser using Apache ECharts. Your data never leaves your device.