diff --git a/crates/apps/kill_tree_cli/src/main.rs b/crates/apps/kill_tree_cli/src/main.rs
new file mode 100644
index 0000000..5e7edf1
--- /dev/null
+++ b/crates/apps/kill_tree_cli/src/main.rs
@@ -0,0 +1,87 @@
+use clap::{
+    builder::{styling::AnsiColor, Styles},
+    command, value_parser, ArgAction, Parser,
+};
+use kill_tree::{blocking::kill_tree_with_config, Config};
+
+fn get_styles() -> Styles {
+    Styles::styled()
+        .header(AnsiColor::BrightGreen.on_default().bold())
+        .usage(AnsiColor::BrightGreen.on_default().bold())
+        .literal(AnsiColor::BrightCyan.on_default().bold())
+        .placeholder(AnsiColor::Cyan.on_default())
+}
+
+#[derive(Parser)]
+#[command(name = "kill-tree")]
+#[command(bin_name = "kill-tree")]
+#[command(arg_required_else_help = true)]
+#[command(styles = get_styles())]
+#[command(author, version, about, long_about=None)]
+struct Cli {
+    #[arg(help = "Process ID to kill with all children.")]
+    #[arg(value_parser = value_parser!(u32))]
+    process_id: u32,
+
+    #[arg(help = "Signal to send to the processes.")]
+    #[arg(default_value = "SIGTERM")]
+    signal: String,
+
+    #[arg(short, long)]
+    #[arg(help = "No logs are output.")]
+    #[arg(action = ArgAction::SetTrue)]
+    quiet: bool,
+}
+
+fn main() -> kill_tree::Result<()> {
+    let cli = Cli::parse();
+    let do_print = !cli.quiet;
+    if do_print {
+        println!(
+            "Killing all of target process and its children recursively. process id: {}, signal: {}",
+            cli.process_id, cli.signal
+        );
+    }
+
+    let outputs = match kill_tree_with_config(
+        cli.process_id,
+        &Config {
+            signal: cli.signal,
+            ..Default::default()
+        },
+    ) {
+        Ok(x) => x,
+        Err(e) => {
+            if do_print {
+                println!("Failed to kill processes. error: {e}");
+            }
+            return Err(e);
+        }
+    };
+
+    if do_print {
+        println!(
+            "Killing is done. Number of killed processes: {}",
+            outputs.len()
+        );
+        for (index, output) in outputs.iter().enumerate() {
+            match output {
+                kill_tree::Output::Killed {
+                    process_id,
+                    parent_process_id,
+                    name,
+                } => {
+                    println!(
+                        "[{index}] Killed process. process id: {process_id}, parent process id: {parent_process_id}, name: {name}"
+                    );
+                }
+                kill_tree::Output::MaybeAlreadyTerminated { process_id, source } => {
+                    println!(
+                        "[{index}] Maybe already terminated process. process id: {process_id}, source: {source}"
+                    );
+                }
+            }
+        }
+    }
+    Ok(())
+}
diff --git a/test.mjs b/test.mjs
index 900b491..0242987 100644
--- a/test.mjs
+++ b/test.mjs
@@ -14,9 +14,12 @@ async function main() {
       target.on("spawn", () => {
         console.log(`Spawned server ${target.pid}`);
         const start = Date.now();
-        const kill_tree = spawn("target/release/tokio", [target.pid], {
+        const kill_tree = spawn("target/release/blocking.exe", [target.pid], {
           stdio: "inherit",
         });
+        // const kill_tree = spawn("taskkill", ["/T", "/F", "/PID", target.pid], {
+        //   stdio: "inherit",
+        // });
         kill_tree.on("exit", () => {
           const end = Date.now();
           const elapsed = end - start;
@@ -38,11 +41,14 @@ main();
 
 // windows
 // blocking
-// Total elapsed time: 16689ms
-// Mean elapsed time: 16.689ms
+// Total elapsed time: 13437ms
+// Mean elapsed time: 13.437ms
 // tokio
-// Total elapsed time: 17835ms
-// Mean elapsed time: 17.835ms
+// Total elapsed time: 13314ms
+// Mean elapsed time: 13.314ms
+// taskkill
+// Total elapsed time: 48045ms
+// Mean elapsed time: 48.045ms
 
 // linux
 // blocking