Guys, do you know charts lib that is good as Highcharts, but doesn't require a license?

using javascript or can be another language?

js yes

What about chart.js https://www.chartjs.org/ ?

i already used nvd3.js, simplier & reusable d3.js charts. depends on what type of chart you want to use can be a good alternative. another way is use d3.js directly, but, well..., it's not simply to learn d3.js (for me at least 😞) d3.js you probably can create the same charts as highcharts and have control of everything... the cost is the complexity of doing this.

@[DEPRECATED] Marcos Marx Will try it, didn't know it before. Thanks.

big fan of ECharts, we’re migrating all the charts from Apache Superset from nvd3 into ECharts. If you’re curious, I wrote a bit about our reasoning here https://preset.io/blog/2021-4-1-why-echarts/