diff --git a/middleware/basic_auth.go b/middleware/basic_auth.go
index 12f102e3..bb083905 100644
--- a/middleware/basic_auth.go
+++ b/middleware/basic_auth.go
@@ -9,7 +9,7 @@ import (
 type (
 	// BasicAuthConfig defines the config for HTTP basic auth middleware.
 	BasicAuthConfig struct {
-		// Validator is the function to validate basic auth credentials.
+		// Validator is a function to validate basic auth credentials.
 		Validator BasicAuthValidator
 	}
 
diff --git a/middleware/body_limit.go b/middleware/body_limit.go
index 9ead468f..f09aac31 100644
--- a/middleware/body_limit.go
+++ b/middleware/body_limit.go
@@ -13,7 +13,7 @@ import (
 type (
 	// BodyLimitConfig defines the config for body limit middleware.
 	BodyLimitConfig struct {
-		// Limit is the maximum allowed size for a request body, it can be specified
+		// Maximum allowed size for a request body, it can be specified
 		// as `4x` or `4xB`, where x is one of the multiple from K, M, G, T or P.
 		Limit string `json:"limit"`
 		limit int64
diff --git a/middleware/compress.go b/middleware/compress.go
index 164ca36c..83d0b2f5 100644
--- a/middleware/compress.go
+++ b/middleware/compress.go
@@ -15,8 +15,8 @@ import (
 type (
 	// GzipConfig defines the config for gzip middleware.
 	GzipConfig struct {
-		// Level is the gzip level.
-		// Optional, with default value as -1.
+		// Gzip compression level.
+		// Optional. Default value -1.
 		Level int
 	}
 
diff --git a/middleware/cors.go b/middleware/cors.go
index d6724062..3cf0d40e 100644
--- a/middleware/cors.go
+++ b/middleware/cors.go
@@ -12,34 +12,34 @@ type (
 	// CORSConfig defines the config for CORS middleware.
 	CORSConfig struct {
 		// AllowOrigin defines a list of origins that may access the resource.
-		// Optional, with default value as []string{"*"}.
+		// Optional. Default value []string{"*"}.
 		AllowOrigins []string
 
 		// AllowMethods defines a list methods allowed when accessing the resource.
 		// This is used in response to a preflight request.
-		// Optional, with default value as `DefaultCORSConfig.AllowMethods`.
+		// Optional. Default value DefaultCORSConfig.AllowMethods.
 		AllowMethods []string
 
 		// AllowHeaders defines a list of request headers that can be used when
 		// making the actual request. This in response to a preflight request.
-		// Optional, with default value as []string{}.
+		// Optional. Default value []string{}.
 		AllowHeaders []string
 
 		// AllowCredentials indicates whether or not the response to the request
 		// can be exposed when the credentials flag is true. When used as part of
 		// a response to a preflight request, this indicates whether or not the
 		// actual request can be made using credentials.
-		// Optional, with default value as false.
+		// Optional. Default value false.
 		AllowCredentials bool
 
 		// ExposeHeaders defines a whitelist headers that clients are allowed to
 		// access.
-		// Optional, with default value as []string{}.
+		// Optional. Default value []string{}.
 		ExposeHeaders []string
 
 		// MaxAge indicates how long (in seconds) the results of a preflight request
 		// can be cached.
-		// Optional, with default value as 0.
+		// Optional. Default value 0.
 		MaxAge int
 	}
 )
diff --git a/middleware/jwt.go b/middleware/jwt.go
index 7a792e20..2ec9fd1c 100644
--- a/middleware/jwt.go
+++ b/middleware/jwt.go
@@ -11,21 +11,20 @@ import (
 type (
 	// JWTConfig defines the config for JWT auth middleware.
 	JWTConfig struct {
-		// SigningKey is the key to validate token.
+		// Signing key to validate token.
 		// Required.
 		SigningKey []byte
 
-		// SigningMethod is used to check token signing method.
-		// Optional, with default value as `HS256`.
+		// Signing method, used to check token signing method.
+		// Optional. Default value HS256.
 		SigningMethod string
 
-		// ContextKey is the key to be used for storing user information from the
-		// token into context.
-		// Optional, with default value as `user`.
+		// Context key to store user information from the token into context.
+		// Optional. Default value "user".
 		ContextKey string
 
 		// Extractor is a function that extracts token from the request.
-		// Optional, with default values as `JWTFromHeader`.
+		// Optional. Default value JWTFromHeader.
 		Extractor JWTExtractor
 	}
 
diff --git a/middleware/logger.go b/middleware/logger.go
index 0fecd5b8..c22e40c1 100644
--- a/middleware/logger.go
+++ b/middleware/logger.go
@@ -19,7 +19,7 @@ import (
 type (
 	// LoggerConfig defines the config for logger middleware.
 	LoggerConfig struct {
-		// Format is the log format which can be constructed using the following tags:
+		// Log format which can be constructed using the following tags:
 		//
 		// - time_rfc3339
 		// - id (Request ID - Not implemented)
@@ -38,11 +38,11 @@ type (
 		//
 		// Example "${remote_ip} ${status}"
 		//
-		// Optional, with default value as `DefaultLoggerConfig.Format`.
+		// Optional. Default value DefaultLoggerConfig.Format.
 		Format string
 
-		// Output is the writer where logs are written.
-		// Optional with default value as os.Stdout.
+		// Output is a writer where logs are written.
+		// Optional. Default value os.Stdout.
 		Output io.Writer
 
 		template   *fasttemplate.Template
diff --git a/middleware/method_override.go b/middleware/method_override.go
index f876f01a..0b49e5ca 100644
--- a/middleware/method_override.go
+++ b/middleware/method_override.go
@@ -8,11 +8,11 @@ type (
 	// MethodOverrideConfig defines the config for method override middleware.
 	MethodOverrideConfig struct {
 		// Getter is a function that gets overridden method from the request.
+		// Optional. Default values MethodFromHeader(echo.HeaderXHTTPMethodOverride).
 		Getter MethodOverrideGetter
 	}
 
 	// MethodOverrideGetter is a function that gets overridden method from the request
-	// Optional, with default values as `MethodFromHeader(echo.HeaderXHTTPMethodOverride)`.
 	MethodOverrideGetter func(echo.Context) string
 )
 
diff --git a/middleware/recover.go b/middleware/recover.go
index fa336ff5..0c250e4e 100644
--- a/middleware/recover.go
+++ b/middleware/recover.go
@@ -11,17 +11,17 @@ import (
 type (
 	// RecoverConfig defines the config for recover middleware.
 	RecoverConfig struct {
-		// StackSize is the stack size to be printed.
-		// Optional, with default value as 4 KB.
+		// Size of the stack to be printed.
+		// Optional. Default value 4KB.
 		StackSize int
 
 		// DisableStackAll disables formatting stack traces of all other goroutines
 		// into buffer after the trace for the current goroutine.
-		// Optional, with default value as false.
+		// Optional. Default value false.
 		DisableStackAll bool
 
 		// DisablePrintStack disables printing stack trace.
-		// Optional, with default value as false.
+		// Optional. Default value as false.
 		DisablePrintStack bool
 	}
 )
diff --git a/middleware/secure.go b/middleware/secure.go
index 459a15f7..1702595d 100644
--- a/middleware/secure.go
+++ b/middleware/secure.go
@@ -11,12 +11,12 @@ type (
 	SecureConfig struct {
 		// XSSProtection provides protection against cross-site scripting attack (XSS)
 		// by setting the `X-XSS-Protection` header.
-		// Optional, with default value as `1; mode=block`.
+		// Optional. Default value "1; mode=block".
 		XSSProtection string
 
 		// ContentTypeNosniff provides protection against overriding Content-Type
 		// header by setting the `X-Content-Type-Options` header.
-		// Optional, with default value as "nosniff".
+		// Optional. Default value "nosniff".
 		ContentTypeNosniff string
 
 		// XFrameOptions can be used to indicate whether or not a browser should
@@ -24,7 +24,7 @@ type (
 		// Sites can use this to avoid clickjacking attacks, by ensuring that their
 		// content is not embedded into other sites.provides protection against
 		// clickjacking.
-		// Optional, with default value as "SAMEORIGIN".
+		// Optional. Default value "SAMEORIGIN".
 		// Possible values:
 		// `SAMEORIGIN` - The page can only be displayed in a frame on the same origin as the page itself.
 		// `DENY` - The page cannot be displayed in a frame, regardless of the site attempting to do so.
@@ -35,20 +35,20 @@ type (
 		// long (in seconds) browsers should remember that this site is only to
 		// be accessed using HTTPS. This reduces your exposure to some SSL-stripping
 		// man-in-the-middle (MITM) attacks.
-		// Optional, with default value as 0.
+		// Optional. Default value 0.
 		HSTSMaxAge int
 
 		// HSTSExcludeSubdomains won't include subdomains tag in the `Strict Transport Security`
 		// header, excluding all subdomains from security policy. It has no effect
 		// unless HSTSMaxAge is set to a non-zero value.
-		// Optional, with default value as false.
+		// Optional. Default value false.
 		HSTSExcludeSubdomains bool
 
 		// ContentSecurityPolicy sets the `Content-Security-Policy` header providing
 		// security against cross-site scripting (XSS), clickjacking and other code
 		// injection attacks resulting from execution of malicious content in the
 		// trusted web page context.
-		// Optional, with default value as "".
+		// Optional. Default value "".
 		ContentSecurityPolicy string
 	}
 )
diff --git a/middleware/slash.go b/middleware/slash.go
index 67c6bcde..621fa5b6 100644
--- a/middleware/slash.go
+++ b/middleware/slash.go
@@ -7,7 +7,7 @@ import (
 type (
 	// TrailingSlashConfig defines the config for TrailingSlash middleware.
 	TrailingSlashConfig struct {
-		// RedirectCode is the status code used when redirecting the request.
+		// Status code to be used when redirecting the request.
 		// Optional, but when provided the request is redirected using this code.
 		RedirectCode int
 	}
diff --git a/middleware/static.go b/middleware/static.go
index 05e9e625..db141fa8 100644
--- a/middleware/static.go
+++ b/middleware/static.go
@@ -12,17 +12,16 @@ import (
 type (
 	// StaticConfig defines the config for static middleware.
 	StaticConfig struct {
-		// Root is the directory from where the static content is served.
+		// Root directory from where the static content is served.
 		// Required.
 		Root string `json:"root"`
 
-		// Index is the list of index files to be searched and used when serving
-		// a directory.
-		// Optional, with default value as []string{"index.html"}.
-		Index []string `json:"index"`
+		// Index file for serving a directory.
+		// Optional. Default value "index.html".
+		Index string `json:"index"`
 
-		// Browse is a flag to enable/disable directory browsing.
-		// Optional, with default value as false.
+		// Enable/disable directory browsing.
+		// Optional. Default value false.
 		Browse bool `json:"browse"`
 	}
 )
@@ -30,7 +29,7 @@ type (
 var (
 	// DefaultStaticConfig is the default static middleware config.
 	DefaultStaticConfig = StaticConfig{
-		Index:  []string{"index.html"},
+		Index:  "index.html",
 		Browse: false,
 	}
 )
@@ -47,7 +46,7 @@ func Static(root string) echo.MiddlewareFunc {
 // See `Static()`.
 func StaticWithConfig(config StaticConfig) echo.MiddlewareFunc {
 	// Defaults
-	if config.Index == nil {
+	if config.Index == "" {
 		config.Index = DefaultStaticConfig.Index
 	}
 
@@ -77,8 +76,7 @@ func StaticWithConfig(config StaticConfig) echo.MiddlewareFunc {
 				d := f
 
 				// Index file
-				// TODO: search all files
-				file = path.Join(file, config.Index[0])
+				file = path.Join(file, config.Index)
 				f, err = fs.Open(file)
 				if err == nil {
 					// Index file