CouchDB is one of a new Database Management System that completely embraces the web an store your data with JSON documents. You can also Access your documents and query your indexes with your web browser with the help of HTTP protocols. CouchDB works well with modern web and mobile apps and also serve web apps directly out of CouchDB and you can also distribute your data or your apps, efficiently using incremental replication. CouchDB Indexing transforming and combining of documents are performed through JavaScript because it uses all of these web-friendly standards and technologies, CouchDB works very well with web and mobile applications.