diff --git a/README.md b/README.md
index ea345be..91afa26 100644
--- a/README.md
+++ b/README.md
@@ -5,29 +5,129 @@
 
 ## Usage
 
-	Usage:
+```
+httpcat [OPTIONS] <command>
 
-	  Client mode
-		 httpcat -client [options] http://uri-to-send-request-to.com
+Application Options:
+  -v,	--verbose       Show additional details
+		--headers       Show headers and request/status line only (default is everything)
+		--bodies        Show bodies only (default is everything)
+		--nocolour      Don't use colours (default is requests are blue and responses are red)
+		--notimestamps  Don't show timestamps
 
-		 Currently only supports GET requests.
+Help Options:
+  -h, --help          Show this help message
 
-	  Server mode
-		 httpcat -server [options]
+Available commands:
+  client   Send an HTTP request
+  proxy    Start a reverse HTTP logging proxy
+  server   Start a mock HTTP server
+  version  Display version
+```
 
-	  Options (either mode)
-		 -entire or -e : Display entire request/response instead of just the body.
-		 -verbose or -v : Be verbose.
+Get help about a specific command by adding `--help` after the command.  Example:
 
-	  Options (client mode only)
-		 -accept or -a [accept string] : Adds 'Accept' header to request.
+```
+httpcat client --help
+```
 
-	  Options (server mode only)
-		 -body or -b [body message] : Body to respond with.  Response code will default to 200.
-		 -port or -p [port] : Port to listen on.
-		 -response or -r [response code] : Status code to respond with.  Defaults to 204.
-		 -cors or -c : Enable Cross Origin Resource Sharing support.
-		 -separator or -s [separator string] : Use the provided separator to separate messages.
+## Client Mode
+
+Sends a request to the specified server and displays the response.
+
+### Usage
+
+```
+httpcat [OPTIONS] client [client-OPTIONS]
+
+Application Options:
+  -v, --verbose       Show additional details
+      --headers       Show headers and request/status line only (default is everything)
+      --bodies        Show bodies only (default is everything)
+      --nocolour      Don't use colours (default is requests are blue and responses are red)
+      --notimestamps  Don't show timestamps
+
+Help Options:
+  -h, --help          Show this help message
+
+[client command options]
+      -u, --uri=      The URI to send the request to
+          --header=   A header to add to request in the form name:value. Use multiple times for multiple headers.
+      -m, --method=   HTTP method for request (default: GET)
+      -b, --body=     Request body to send
+```
+
+### Example
+
+```
+httpcat client --method POST --body TESTING --uri http://localhost:8080/api/testing
+```
+
+## Server Mode
+
+Creates mock routes that listen on specific paths and return specific response bodies.  Displays the details of any requests that it receives.
+
+### Usage
+
+```
+httpcat [OPTIONS] server [server-OPTIONS]
+
+Application Options:
+  -v, --verbose       Show additional details
+      --headers       Show headers and request/status line only (default is everything)
+      --bodies        Show bodies only (default is everything)
+      --nocolour      Don't use colours (default is requests are blue and responses are red)
+      --notimestamps  Don't show timestamps
+
+Help Options:
+  -h, --help          Show this help message
+
+[server command options]
+      -p, --port=     Port to listen on. (default: 8080)
+      -r, --route=    Route which is made up of a path, a response body, and a response status, all separated by the pipe character.  Repeat for additional routes. (default: /|testing|200)
+      -c, --cors      Enable Cross Origin Resource Sharing (CORS).
+      -H, --header=   A header to add to response in the form name:value. Repeat for additional headers.
+```
+
+### Example
+
+```
+httpcat server --port 8080 --route "/hello|Hello World|200" --header "Content-Type:text/plain"
+```
+
+This creates a web server that listens on port 8080 and responds to any requests to the `/hello` path with the response `Hello World` and response code `200`.  Repeat the `--route` option to add more routes.
+
+## Proxy Mode
+
+Creates a reverse proxy that displays all HTTP requests and responses that pass through it.
+
+### Usage
+
+```
+httpcat [OPTIONS] proxy [proxy-OPTIONS]
+
+Application Options:
+  -v, --verbose       Show additional details
+      --headers       Show headers and request/status line only (default is everything)
+      --bodies        Show bodies only (default is everything)
+      --nocolour      Don't use colours (default is requests are blue and responses are red)
+      --notimestamps  Don't show timestamps
+
+Help Options:
+  -h, --help          Show this help message
+
+[proxy command options]
+      -p, --port=     The port that the proxy listens on.
+      -t, --target=
+```
+
+### Example
+
+```
+httpcat proxy --port 8090 --target http://localhost:8080
+```
+
+Any requests sent to port 8090 will be forwarded to `http://localhost:8080` and all requests and responses will be displayed.
 
 ## Building
 
@@ -61,7 +161,3 @@
 ```
 GOOS=darwin GOARCH=arm64 go build -o ../httpcat-mac-arm64
 ```
-
-## To Do
-
-Add support for DELETE, PUT, and POST requests in client mode.