| Name | Description | Type | Package | Framework |
| DeflateFrameClientExtensionHandshaker | handshake implementation. | Class | io.netty.handler.codec.http.websocketx.extensions.compression | Netty |
| DeflateFrameServerExtensionHandshaker | handshake implementation. | Class | io.netty.handler.codec.http.websocketx.extensions.compression | Netty |
| PerMessageDeflateClientExtensionHandshaker | handshake implementation. | Class | io.netty.handler.codec.http.websocketx.extensions.compression | Netty |
| PerMessageDeflateServerExtensionHandshaker | handshake implementation. | Class | io.netty.handler.codec.http.websocketx.extensions.compression | Netty |
| WebSocketClientCompressionHandler | to handle the most common WebSocket Compression Extensions. | Class | io.netty.handler.codec.http.websocketx.extensions.compression | Netty |
| WebSocketClientExtension | Created once the handshake phase is done. | Interface | io.netty.handler.codec.http.websocketx.extensions | Netty |
| WebSocketClientExtensionHandler | This handler negotiates and initializes the WebSocket Extensions. | Class | io.netty.handler.codec.http.websocketx.extensions | Netty |
| WebSocketClientExtensionHandshaker | Handshakes a client extension with the server. | Interface | io.netty.handler.codec.http.websocketx.extensions | Netty |
| WebSocketExtension | Created once the handshake phase is done. | Interface | io.netty.handler.codec.http.websocketx.extensions | Netty |
| WebSocketExtensionData | A WebSocket Extension data from the Sec-WebSocket-Extensions header. | Class | io.netty.handler.codec.http.websocketx.extensions | Netty |
| WebSocketExtensionDecoder | Convenient class for io. | Class | io.netty.handler.codec.http.websocketx.extensions | Netty |
| WebSocketExtensionEncoder | Convenient class for io. | Class | io.netty.handler.codec.http.websocketx.extensions | Netty |
| WebSocketExtensionUtil | Class | io.netty.handler.codec.http.websocketx.extensions | Netty | |
| WebSocketServerCompressionHandler | to handle the most common WebSocket Compression Extensions. | Class | io.netty.handler.codec.http.websocketx.extensions.compression | Netty |
| WebSocketServerExtension | Created once the handshake phase is done. | Interface | io.netty.handler.codec.http.websocketx.extensions | Netty |
| WebSocketServerExtensionHandler | This handler negotiates and initializes the WebSocket Extensions. | Class | io.netty.handler.codec.http.websocketx.extensions | Netty |
| WebSocketServerExtensionHandshaker | Handshakes a client extension based on this server capabilities. | Interface | io.netty.handler.codec.http.websocketx.extensions | Netty |