SVG is an open, industry-standard XML-based format for vector graphics developed by the W3C. Its acceptance is growing fast. These days, most vector editors can import and export SVG, and modern browsers (such as Firefox and Opera) can display it directly without requiring any plugins.
Method Draw is a pretty good SVG file editing app that you can use to make changes to your existing SVG file. From altering the color to adding shapes, you can do anything with the help of the Method Draw web app. This particular app will allow you to import more than one SVG file. However, if you want to export, you will get two options, i.e., PNG and SVG. The drawback of this tool is you won’t get any “Layer” option. That implies that you cannot do any layer-level editing. This tool has a clean and simple UI.