diff --git a/.vscode/settings.json b/.vscode/settings.json
index b36583f..0eca799 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,6 +1,7 @@
 {
     "rust-analyzer.linkedProjects": [
         "./dyesub-tool/Cargo.toml",
+        "./dyesub-cli/Cargo.toml",
         "./dyesub/Cargo.toml",
         "./svg-units/Cargo.toml",
     ]
diff --git a/Cargo.lock b/Cargo.lock
index b8c9100..518257e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -37,6 +37,55 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "anstream"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ca84f3628370c59db74ee214b3263d58f9aadd9b4fe7e711fd87dc452b7f163"
+dependencies = [
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is-terminal",
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3a30da5c5f2d5e72842e00bcb57657162cdabef0931f40e2deb9b4140440cecd"
+
+[[package]]
+name = "anstyle-parse"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "938874ff5980b03a87c5524b3ae5b59cf99b1d6bc836848df7bc5ada9643c333"
+dependencies = [
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle-query"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ca11d4be1bab0c8bc8734a9aa7bf4ee8316d462a08c6ac5052f888fef5b494b"
+dependencies = [
+ "windows-sys",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c677ab05e09154296dd37acecd46420c17b9713e8366facafa8fc0885167cf4c"
+dependencies = [
+ "anstyle",
+ "windows-sys",
+]
+
 [[package]]
 name = "anyhow"
 version = "1.0.75"
@@ -176,6 +225,12 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "bitflags"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4682ae6287fcf752ecaabbfcc7b6f9b72aa33933dc23a554d853aea8eea8635"
+
 [[package]]
 name = "block-buffer"
 version = "0.10.4"
@@ -245,6 +300,45 @@ dependencies = [
  "half",
 ]
 
+[[package]]
+name = "clap"
+version = "4.3.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "03aef18ddf7d879c15ce20f04826ef8418101c7e528014c3eeea13321047dca3"
+dependencies = [
+ "clap_builder",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.3.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8ce6fffb678c9b80a70b6b6de0aad31df727623a70fd9a842c30cd573e2fa98"
+dependencies = [
+ "anstream",
+ "anstyle",
+ "clap_lex",
+ "strsim",
+]
+
+[[package]]
+name = "clap_derive"
+version = "4.3.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "54a9bb5758fc5dfe728d1019941681eccaf0cf8a4189b692a0ee2f2ecf90a050"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.28",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2da6da31387c7e4ef160ffab6d5e7f00c42626fe39aea70a7b0f1773f7dd6c1b"
+
 [[package]]
 name = "class_list"
 version = "0.1.1"
@@ -271,6 +365,12 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "186dce98367766de751c42c4f03970fc60fc012296e706ccbb9d5df9b6c1e271"
 
+[[package]]
+name = "colorchoice"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "acbf1af155f9b9ef647e42cdc158db4b64a1b61f743629225fde6f3e0be2a7c7"
+
 [[package]]
 name = "config"
 version = "0.13.3"
@@ -411,6 +511,15 @@ dependencies = [
  "svg-units",
 ]
 
+[[package]]
+name = "dyesub-cli"
+version = "0.1.0"
+dependencies = [
+ "clap",
+ "clap_derive",
+ "dyesub",
+]
+
 [[package]]
 name = "dyesub-tool"
 version = "0.1.0"
@@ -475,6 +584,27 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 
+[[package]]
+name = "errno"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6b30f669a7961ef1631673d2766cc92f52d64f7ef354d4fe0ddfd30ed52f0f4f"
+dependencies = [
+ "errno-dragonfly",
+ "libc",
+ "windows-sys",
+]
+
+[[package]]
+name = "errno-dragonfly"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa68f1b12764fab894d2755d2518754e71b4fd80ecfb822714a1206c2aab39bf"
+dependencies = [
+ "cc",
+ "libc",
+]
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -687,6 +817,12 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
+[[package]]
+name = "hermit-abi"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "443144c8cdadd93ebf52ddb4056d257f5b52c04d3c804e657d19eb73fc33668b"
+
 [[package]]
 name = "html-escape"
 version = "0.2.13"
@@ -811,6 +947,17 @@ version = "2.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "28b29a3cd74f0f4598934efe3aeba42bae0eb4680554128851ebbecb02af14e6"
 
+[[package]]
+name = "is-terminal"
+version = "0.4.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb0889898416213fab133e1d33a0e5858a48177452750691bde3666d0fdbaf8b"
+dependencies = [
+ "hermit-abi",
+ "rustix",
+ "windows-sys",
+]
+
 [[package]]
 name = "itertools"
 version = "0.10.5"
@@ -1022,6 +1169,12 @@ version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0717cef1bc8b636c6e1c1bbdefc09e6322da8a9321966e8928ef80d20f7f770f"
 
+[[package]]
+name = "linux-raw-sys"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57bcfdad1b858c2db7c38303a6d2ad4dfaf5eb53dfeb0910128b2c26d6158503"
+
 [[package]]
 name = "lock_api"
 version = "0.4.10"
@@ -1425,7 +1578,7 @@ version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "567664f262709473930a4bf9e51bf2ebf3348f2e748ccc50dea20646858f8f29"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
 ]
 
 [[package]]
@@ -1504,7 +1657,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "88073939a61e5b7680558e6be56b419e208420c2adb92be54921fa6b72283f1a"
 dependencies = [
  "base64 0.13.1",
- "bitflags",
+ "bitflags 1.3.2",
  "serde",
 ]
 
@@ -1553,6 +1706,19 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "rustix"
+version = "0.38.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "19ed4fa021d81c8392ce04db050a3da9a60299050b7ae1cf482d862b54a7218f"
+dependencies = [
+ "bitflags 2.4.0",
+ "errno",
+ "libc",
+ "linux-raw-sys",
+ "windows-sys",
+]
+
 [[package]]
 name = "rustversion"
 version = "1.0.14"
@@ -1768,6 +1934,12 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "strsim"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
+
 [[package]]
 name = "strum"
 version = "0.25.0"
@@ -2031,6 +2203,12 @@ version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5190c9442dcdaf0ddd50f37420417d219ae5261bbf5db120d0f9bab996c9cba1"
 
+[[package]]
+name = "utf8parse"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
+
 [[package]]
 name = "uuid"
 version = "1.4.1"
diff --git a/Cargo.toml b/Cargo.toml
index 28f5169..35797e0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,3 +1,3 @@
 [workspace]
-members = ["dyesub-tool", "dyesub", "svg-units"]
+members = ["dyesub-tool", "dyesub-cli", "dyesub", "svg-units"]
 resolver = "2"
\ No newline at end of file
diff --git a/dyesub-cli/.gitignore b/dyesub-cli/.gitignore
new file mode 100644
index 0000000..551c6b3
--- /dev/null
+++ b/dyesub-cli/.gitignore
@@ -0,0 +1,2 @@
+*.json
+*.svg
\ No newline at end of file
diff --git a/dyesub-cli/Cargo.toml b/dyesub-cli/Cargo.toml
new file mode 100644
index 0000000..c32d273
--- /dev/null
+++ b/dyesub-cli/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "dyesub-cli"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+clap = "4.3.23"
+clap_derive = "4.3.12"
+dyesub = { path = "../dyesub" }
diff --git a/dyesub-cli/src/main.rs b/dyesub-cli/src/main.rs
new file mode 100644
index 0000000..12e3dc7
--- /dev/null
+++ b/dyesub-cli/src/main.rs
@@ -0,0 +1,31 @@
+#![feature(path_file_prefix)]
+
+use std::path::PathBuf;
+
+use clap::Parser;
+use clap_derive::Parser;
+use dyesub::Result;
+
+#[derive(Parser, Debug)]
+#[command(author, version, about, long_about = None)]
+struct Args {
+    /// Input KLE JSON path
+    input: PathBuf,
+    /// Output SVG path
+    #[arg(short, long)]
+    output: Option<PathBuf>,
+}
+
+fn main() -> Result<()> {
+    let args = Args::parse();
+    let output = args.output.unwrap_or_else(|| {
+        let mut path = args.input.clone();
+        path.set_extension("svg");
+        path
+    });
+    dyesub::render_file(
+        &args.input,
+        &output,
+    )?;
+    Ok(())
+}
diff --git a/flake.nix b/flake.nix
index c76bdcd..ecc8ed1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -46,16 +46,26 @@ Updating `cargoHash`:
           })
           bacon
         ];
-        inputsFrom = with self.packages.${system}; [ dyesub-tool ];
+        inputsFrom = with self.packages.${system}; [ dyesub-tool dyesub-cli ];
       };
       packages.${system} = {
-        default = self.packages.${system}.dyesub-tool;
+        # TODO: use nightly
+        default = self.packages.${system}.dyesub-cli;
+        dyesub-cli = pkgs.rustPlatform.buildRustPackage (rustSettings // {
+          pname = "dyesub-cli";
+          version = "0.1.0";
+          buildAndTestSubdir = "dyesub-cli";
+          cargoHash = "sha256-S4GvLg/B/FxjNyrQyBg25OMTgJVVBwPO+Dy/EFM4WoQ=";
+          meta = meta // {
+            description = "A tool for generating dye sublimation transfer sheet SVGs for Japanese thumb shift 拇指シフト keycaps.";
+          };
+        });
         dyesub-tool = pkgs.rustPlatform.buildRustPackage (rustSettings // {
           pname = "dyesub-tool";
           version = "0.1.0";
           buildAndTestSubdir = "dyesub-tool";
           buildInputs = with pkgs; [ trunk ];
-          cargoHash = "sha256-52zTjWRXq058BhuRj2A7mvWzC88UCEolodnBcfa3Ol8=";
+          cargoHash = "sha256-KSBTEBHuWaenIVaKUMDRFToYxcTA/TFwsIG10WNP47g=";
           meta = meta // {
             description = "A tool for generating dye sublimation transfer sheet SVGs for Japanese thumb shift 拇指シフト keycaps.";
           };