diff --git a/cli/args/flags.rs b/cli/args/flags.rs
index 418edcf34b62a8..eaff68765d1361 100644
--- a/cli/args/flags.rs
+++ b/cli/args/flags.rs
@@ -343,6 +343,7 @@ pub struct ServeFlags {
   pub port: u16,
   pub host: String,
   pub worker_count: Option<usize>,
+  pub open_site: bool,
 }
 
 impl ServeFlags {
@@ -354,6 +355,7 @@ impl ServeFlags {
       port,
       host: host.to_owned(),
       worker_count: None,
+      open_site: false,
     }
   }
 }
@@ -3037,7 +3039,7 @@ Start a server defined in server.ts, watching for changes and running on port 50
         .long("host")
         .help("The TCP address to serve on, defaulting to 0.0.0.0 (all interfaces)")
         .value_parser(serve_host_validator),
-    )
+    ).arg(Arg::new("open_site").long("open").help("Open the browser on the address that the server is running on.").action(ArgAction::SetTrue))
     .arg(
       parallel_arg("multiple server workers")
     )
@@ -5238,6 +5240,7 @@ fn serve_parse(
   let host = matches
     .remove_one::<String>("host")
     .unwrap_or_else(|| "0.0.0.0".to_owned());
+  let open_site = matches.remove_one::<bool>("open_site").unwrap_or(false);
 
   let worker_count = parallel_arg_parse(matches).map(|v| v.get());
 
@@ -5284,6 +5287,7 @@ fn serve_parse(
     port,
     host,
     worker_count,
+    open_site,
   });
 
   Ok(())
diff --git a/cli/tools/serve.rs b/cli/tools/serve.rs
index d7989140aeb20f..e96fb8f3fcb501 100644
--- a/cli/tools/serve.rs
+++ b/cli/tools/serve.rs
@@ -44,10 +44,25 @@ pub async fn serve(
   maybe_npm_install(&factory).await?;
 
   let worker_factory = factory.create_cli_main_worker_factory().await?;
+
+  if serve_flags.open_site {
+    let host: String;
+    if serve_flags.host == "0.0.0.0" || serve_flags.host == "127.0.0.1" {
+      host = "http://127.0.0.1".to_string();
+    } else if serve_flags.host == "localhost" {
+      host = "http://localhost".to_string();
+    } else {
+      host = format!("https://{}", serve_flags.host);
+    }
+    let port = serve_flags.port;
+    let _ = open::that_detached(format!("{host}:{port}"));
+  }
+
   let hmr = serve_flags
     .watch
     .map(|watch_flags| watch_flags.hmr)
     .unwrap_or(false);
+
   do_serve(
     worker_factory,
     main_module.clone(),