Web applications dynamic functional prototyping Based on business requirements, printed forms and report forms, a ready-made application is created to test the functionality via web application constructor. As a result, the customer receives: web access to the working functional prototype of the web application database model model of access rights Interface model a list of not implemented functions and a difference from a real web application. The customer actually receives a minimum viable product (MVP) Group of web developers are ready to make web application based on prototype and test results by symfony,yii,laravel,node.js and on fix price condition.