PatternICO is a great free handy online tool for generating seamless patterns using premade icon library or using your own uploaded graphics. It's made by deigners for designers. With Love.
Browse the library of SVG icons for making your own seamless icon background for your preffered topic
Drag and drop symbols from the library to the canvas and start the magic
You will have some of the options for each object, you can MOVE, ROTATE, SCALE, DUPLICATE, CHANGE COLOR
You can add custom background or change the solid color, apply transparency to all shapes/icons, and or change canvas size
In the end you can share your pattern, save it or download JPG for using in your web projects.
This is free tool for making beutifull seamless graphics very fast and comfortable