Here list of the useful website for web development.
Grammarly plugin useful for content spell check and help to improve grammatically mistake
Responsinator helps website makers quickly get an indication of how their responsive site will look on the most popular devices. It does not precisely replicate how it will look, for accurate testing always test on the real devices.
WeTransfer is the simplest way to send your files around the world without signup, just upload and share URL.
Most Web documents are written using markup languages, such as HTML or XHTML. These languages are defined by technical specifications, which usually include a machine-readable formal grammar (and vocabulary). The act of checking a document against these constraints is called validation and This website useful for validation.
Track your code which files changed for which features, and easily merge multiple developer codes with the track.
A powerful GUI platform to make your API development faster & easier, from building API requests through testing, documentation, and sharing.
You can save project credential and Share notes from anywhere. Your best ideas are always with you and always in sync.
A streamlined web app that helps you create and collaborate on wireframes,
mockups, diagrams, and prototypes. you can see your application look before development.