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About this tool
Generate an Express router with validation, an async wrapper, correct status codes and four-argument error middleware.
This generator produces a ready-to-paste Express router — list, read, create, update and delete routes with validation, an async error wrapper and four-argument error middleware — from nothing but a resource name. It targets Express 4 or Express 5 in ES modules or CommonJS, emits Zod or express-validator schemas, and applies the status codes RFC 9110 prescribes: 201 with a Location header on create and 204 with no body on delete. It is built for Node.js developers who want a correct CRUD skeleton instead of retyping the same boilerplate for every resource.
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Emits the asyncHandler wrapper only on Express 4; Express 5 forwards rejected promises to next() by itself.
The error handler keeps its four-argument signature, because Express detects error middleware by arity alone.
201 plus Location on create, 204 on delete, 404, 409 and 422 mapped per RFC 9110.
Almost always because it does not declare exactly four parameters. Express decides a function is an error handler by counting its declared arguments, so (err, req, res, next) is required — drop next and it silently becomes ordinary middleware. It must also be registered after every route.
No. Express 5 automatically passes a rejected promise from an async handler to next(), which routes it to your error middleware. Express 4 ignores the returned promise entirely, so without a wrapper a thrown error in an async handler leaves the request hanging until it times out.
201 Created, with a Location header pointing at the new resource — that is what RFC 9110 section 15.3.2 specifies. The generated create route does both; a plain 200 is reserved for requests that do not create anything.
Because Express matches routes in registration order, and /:id matches any single path segment — including the literal word search. Register literal segments first or the parameterised route swallows them and your handler receives 'search' as an id.