Express middleware

The Express middleware modules listed here are maintained by the Expressjs team.

Middleware module	Description	Replaces built-in function (Express 3)
body-parser	Parse HTTP request body. See also: body, co-body, and raw-body.	express.bodyParser
compression	Compress HTTP responses.	express.compress
connect-rid	Generate unique request ID.	NA
cookie-parser	Parse cookie header and populate req.cookies. See also cookies and keygrip.	express.cookieParser
cookie-session	Establish cookie-based sessions.	express.cookieSession
cors	Enable cross-origin resource sharing (CORS) with various options.	NA
errorhandler	Development error-handling/debugging.	express.errorHandler
method-override	Override HTTP methods using header.	express.methodOverride
morgan	HTTP request logger.	express.logger
multer	Handle multi-part form data.	express.bodyParser
response-time	Record HTTP response time.	express.responseTime
serve-favicon	Serve a favicon.	express.favicon
serve-index	Serve directory listing for a given path.	express.directory
serve-static	Serve static files.	express.static
session	Establish server-based sessions (development only).	express.session
timeout	Set a timeout period for HTTP request processing.	express.timeout
vhost	Create virtual domains.	express.vhost

Additional middleware modules

These are some additional popular middleware modules.

Middleware module	Description
connect-image-optimus	Optimize image serving. Switches images to .webp or .jxr, if possible.
express-debug	Development tool that adds information about template variables (locals), current session, and so on.
express-partial-response	Filters out parts of JSON responses based on the fields query-string; by using Google API’s Partial Response.
express-simple-cdn	Use a CDN for static assets, with multiple host support.
express-slash	Handles routes with and without trailing slashes.
express-stormpath	User storage, authentication, authorization, SSO, and data security.
express-uncapitalize	Redirects HTTP requests containing uppercase to a canonical lowercase form.
helmet	Helps secure your apps by setting various HTTP headers.
join-io	Joins files on the fly to reduce the requests count.
passport	Authentication using “strategies” such as OAuth, OpenID and many others. See http://passportjs.org/ for more information.
static-expiry	Fingerprint URLs or caching headers for static assets.
view-helpers	Common helper methods for views.
sriracha-admin	Dynamically generate an admin site for Mongoose.

For more middleware modules, see http-framework.