diff --git a/.changes/toml-json5-configs-in-cli.md b/.changes/toml-json5-configs-in-cli.md
new file mode 100644
index 000000000..92eb9a335
--- /dev/null
+++ b/.changes/toml-json5-configs-in-cli.md
@@ -0,0 +1,6 @@
+---
+tauri-cli: minor:enhance
+"@tauri-apps/cli": minor:enhance
+---
+
+Add support for passing TOML and JSON5 config files to `--config` arg
diff --git a/Cargo.lock b/Cargo.lock
index 201828a39..e55041e48 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -8537,6 +8537,7 @@ dependencies = [
  "insta",
  "itertools 0.13.0",
  "json-patch 3.0.1",
+ "json5",
  "jsonrpsee",
  "jsonrpsee-client-transport",
  "jsonrpsee-core",
diff --git a/crates/tauri-cli/Cargo.toml b/crates/tauri-cli/Cargo.toml
index 84ba33f4b..432d90238 100644
--- a/crates/tauri-cli/Cargo.toml
+++ b/crates/tauri-cli/Cargo.toml
@@ -51,6 +51,7 @@ tauri-bundler = { version = "2.3.0", default-features = false, path = "../tauri-
 colored = "2"
 serde = { version = "1", features = ["derive"] }
 serde_json = { version = "1", features = ["preserve_order"] }
+json5 = "0.4"
 notify = "8"
 notify-debouncer-full = "0.5"
 shared_child = "1"
diff --git a/crates/tauri-cli/src/build.rs b/crates/tauri-cli/src/build.rs
index 2f369a3e4..87c81b314 100644
--- a/crates/tauri-cli/src/build.rs
+++ b/crates/tauri-cli/src/build.rs
@@ -45,7 +45,7 @@ pub struct Options {
   /// Skip the bundling step even if `bundle > active` is `true` in tauri config.
   #[clap(long)]
   pub no_bundle: bool,
-  /// JSON strings or path to JSON files to merge with the default configuration file
+  /// JSON strings or paths to JSON, JSON5 or TOML files to merge with the default configuration file
   ///
   /// Configurations are merged in the order they are provided, which means a particular value overwrites previous values when a config key-value pair conflicts.
   ///
diff --git a/crates/tauri-cli/src/bundle.rs b/crates/tauri-cli/src/bundle.rs
index 53fd1e6d6..507dbe006 100644
--- a/crates/tauri-cli/src/bundle.rs
+++ b/crates/tauri-cli/src/bundle.rs
@@ -60,7 +60,7 @@ pub struct Options {
   /// Space or comma separated list of bundles to package.
   #[clap(short, long, action = ArgAction::Append, num_args(0..), value_delimiter = ',')]
   pub bundles: Option<Vec<BundleFormat>>,
-  /// JSON strings or path to JSON files to merge with the default configuration file
+  /// JSON strings or paths to JSON, JSON5 or TOML files to merge with the default configuration file
   ///
   /// Configurations are merged in the order they are provided, which means a particular value overwrites previous values when a config key-value pair conflicts.
   ///
diff --git a/crates/tauri-cli/src/dev.rs b/crates/tauri-cli/src/dev.rs
index de1fee5e2..3d7ea098e 100644
--- a/crates/tauri-cli/src/dev.rs
+++ b/crates/tauri-cli/src/dev.rs
@@ -59,7 +59,7 @@ pub struct Options {
   /// Exit on panic
   #[clap(short, long)]
   pub exit_on_panic: bool,
-  /// JSON strings or path to JSON files to merge with the default configuration file
+  /// JSON strings or paths to JSON, JSON5 or TOML files to merge with the default configuration file
   ///
   /// Configurations are merged in the order they are provided, which means a particular value overwrites previous values when a config key-value pair conflicts.
   ///
diff --git a/crates/tauri-cli/src/lib.rs b/crates/tauri-cli/src/lib.rs
index 59088fa13..4e91f12f4 100644
--- a/crates/tauri-cli/src/lib.rs
+++ b/crates/tauri-cli/src/lib.rs
@@ -63,10 +63,22 @@ impl FromStr for ConfigValue {
     } else {
       let path = PathBuf::from(config);
       if path.exists() {
-        Ok(Self(serde_json::from_str(
-          &read_to_string(&path)
-            .with_context(|| format!("invalid configuration at file {config}"))?,
-        )?))
+        let raw = &read_to_string(&path)
+          .with_context(|| format!("invalid configuration at file {config}"))?;
+        match path.extension() {
+          Some(ext) if ext == "toml" => Ok(Self(::toml::from_str(raw)?)),
+          Some(ext) if ext == "json5" => Ok(Self(::json5::from_str(raw)?)),
+          // treat all other extensions as json
+          _ => Ok(Self(
+            // from tauri-utils/src/config/parse.rs:
+            // we also want to support **valid** json5 in the .json extension
+            // if the json5 is not valid the serde_json error for regular json will be returned.
+            match ::json5::from_str(raw) {
+              Ok(json5) => json5,
+              Err(_) => serde_json::from_str(raw)?,
+            },
+          )),
+        }
       } else {
         anyhow::bail!("provided configuration path does not exist")
       }
diff --git a/crates/tauri-cli/src/mobile/android/build.rs b/crates/tauri-cli/src/mobile/android/build.rs
index 26e27399d..d2d744170 100644
--- a/crates/tauri-cli/src/mobile/android/build.rs
+++ b/crates/tauri-cli/src/mobile/android/build.rs
@@ -49,7 +49,7 @@ pub struct Options {
   /// List of cargo features to activate
   #[clap(short, long, action = ArgAction::Append, num_args(0..))]
   pub features: Option<Vec<String>>,
-  /// JSON strings or path to JSON files to merge with the default configuration file
+  /// JSON strings or paths to JSON, JSON5 or TOML files to merge with the default configuration file
   ///
   /// Configurations are merged in the order they are provided, which means a particular value overwrites previous values when a config key-value pair conflicts.
   ///
diff --git a/crates/tauri-cli/src/mobile/android/dev.rs b/crates/tauri-cli/src/mobile/android/dev.rs
index 0a8b13050..4a7a98f06 100644
--- a/crates/tauri-cli/src/mobile/android/dev.rs
+++ b/crates/tauri-cli/src/mobile/android/dev.rs
@@ -48,7 +48,7 @@ pub struct Options {
   /// Exit on panic
   #[clap(short, long)]
   exit_on_panic: bool,
-  /// JSON strings or path to JSON files to merge with the default configuration file
+  /// JSON strings or paths to JSON, JSON5 or TOML files to merge with the default configuration file
   ///
   /// Configurations are merged in the order they are provided, which means a particular value overwrites previous values when a config key-value pair conflicts.
   ///
diff --git a/crates/tauri-cli/src/mobile/ios/build.rs b/crates/tauri-cli/src/mobile/ios/build.rs
index f33b5b81d..529d59faf 100644
--- a/crates/tauri-cli/src/mobile/ios/build.rs
+++ b/crates/tauri-cli/src/mobile/ios/build.rs
@@ -60,7 +60,7 @@ pub struct Options {
   /// List of cargo features to activate
   #[clap(short, long, action = ArgAction::Append, num_args(0..))]
   pub features: Option<Vec<String>>,
-  /// JSON strings or path to JSON files to merge with the default configuration file
+  /// JSON strings or paths to JSON, JSON5 or TOML files to merge with the default configuration file
   ///
   /// Configurations are merged in the order they are provided, which means a particular value overwrites previous values when a config key-value pair conflicts.
   ///
diff --git a/crates/tauri-cli/src/mobile/ios/dev.rs b/crates/tauri-cli/src/mobile/ios/dev.rs
index 22f336110..3e971c3bc 100644
--- a/crates/tauri-cli/src/mobile/ios/dev.rs
+++ b/crates/tauri-cli/src/mobile/ios/dev.rs
@@ -54,7 +54,7 @@ pub struct Options {
   /// Exit on panic
   #[clap(short, long)]
   exit_on_panic: bool,
-  /// JSON strings or path to JSON files to merge with the default configuration file
+  /// JSON strings or paths to JSON, JSON5 or TOML files to merge with the default configuration file
   ///
   /// Configurations are merged in the order they are provided, which means a particular value overwrites previous values when a config key-value pair conflicts.
   ///