Have a look at the project page

The Visual SPARQL Builder (VSB) is a tool which allows users to create and run SPARQL queries with a graphical interface within the browser. For the creation of a query basic understanding of linked data is needed.

1. Clone this repository and checkout the dist branch (or download a release).
2. Serve the VSB with an webserver like apache or nginx.
3. You probably want to configure the VSB for your own endpoint. Therefore you need to create a file named overwrite.js in the root folder of your VSB copy. For documentation of the structure of the file, please have a look here

1. Clone this repository (or download a release).
2. Install node.js and npm
3. Install grunt npm install -g bower gulp
4. Run npm install
5. Run bower install
6. Run gulp develop to see the app running on https://localhost:8123/
7. Happy Development!