The ability to define the styling of geospatial data is vital to make it the most informative and suitable for different needs. SLD Editor is a Node.js based web application for editing SLD-files easily and visually. The user can import SLD files, style the different elements visually, save different versions of original SLD files and load the new SLD files to be used further. SLD Editor enables also watching the style against the corresponding WMS. All the code is Open Source and available on GitHub! SLD Editor is a web application independent from other applications and developed in National Land Survey of Finland. First version was released in last February and has already raised a lot of interest among European organizations utilizing spatial data. Possibilities of utilizing SLD Editor are wide: use as it is, integrate into your application, develop further to make your own catch-all SLD editor Get to know the SLD Editor now and find your way to make use of it!