diff --git a/Cargo.lock b/Cargo.lock
index 7535e65..0bffee7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -134,6 +134,16 @@ dependencies = [
  "pin-project-lite",
 ]
 
+[[package]]
+name = "trait-transformer"
+version = "0.0.0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "tokio",
+]
+
 [[package]]
 name = "trait-variant"
 version = "0.0.0"
diff --git a/Cargo.toml b/Cargo.toml
index 61df904..dc525bb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,7 @@
 [workspace]
 members = [
     "trait-variant",
+    "trait-transformer",
 ]
 
 resolver = "2"
diff --git a/README.md b/README.md
index f874618..205faeb 100644
--- a/README.md
+++ b/README.md
@@ -20,10 +20,6 @@ Which creates a new `SendIntFactory: IntFactory + Send` trait and additionally b
 
 Implementers of the trait can choose to implement the variant instead of the original trait. The macro creates a blanket impl which ensures that any type which implements the variant also implements the original trait.
 
-## `trait_transformer`
-
-`trait_transformer` does the same thing as `make`, but using experimental nightly-only syntax that depends on the `return_type_notation` feature. It may be used to experiment with new kinds of trait transformations in the future.
-
 #### License and usage notes
 
 Licensed under either of [Apache License, Version 2.0](LICENSE-APACHE) or
diff --git a/trait-transformer/Cargo.toml b/trait-transformer/Cargo.toml
new file mode 100644
index 0000000..c2e77f8
--- /dev/null
+++ b/trait-transformer/Cargo.toml
@@ -0,0 +1,30 @@
+# Copyright (c) 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+# https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+# <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
+# option. This file may not be copied, modified, or distributed
+# except according to those terms.
+
+[package]
+name = "trait-transformer"
+version = "0.0.0"
+description = "Utilities for working with impl traits in Rust"
+categories = ["asynchronous", "no-std", "rust-patterns"]
+keywords = ["async", "trait", "impl"]
+license.workspace = true
+repository.workspace = true
+edition = "2021"
+
+[lib]
+proc-macro = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+proc-macro2 = "1.0"
+quote = "1.0"
+syn = { version = "2.0", features = ["full"] }
+
+[dev-dependencies]
+tokio = { version = "1", features = ["rt"] }
diff --git a/trait-transformer/README.md b/trait-transformer/README.md
new file mode 100644
index 0000000..3e3b755
--- /dev/null
+++ b/trait-transformer/README.md
@@ -0,0 +1,3 @@
+## `trait_transformer`
+
+`trait_transformer` does the same thing as `trait_variant`, but using experimental nightly-only syntax that depends on the `return_type_notation` feature. It may be used to experiment with new kinds of trait transformations in the future.
diff --git a/trait-variant/examples/trait_transformer.rs b/trait-transformer/examples/trait_transformer.rs
similarity index 96%
rename from trait-variant/examples/trait_transformer.rs
rename to trait-transformer/examples/trait_transformer.rs
index 619514e..80129a0 100644
--- a/trait-variant/examples/trait_transformer.rs
+++ b/trait-transformer/examples/trait_transformer.rs
@@ -11,7 +11,7 @@
 
 use std::iter;
 
-use trait_variant::trait_transformer;
+use trait_transformer::trait_transformer;
 
 #[trait_transformer(SendIntFactory: Send)]
 trait IntFactory {
diff --git a/trait-transformer/src/lib.rs b/trait-transformer/src/lib.rs
new file mode 100644
index 0000000..89d6b65
--- /dev/null
+++ b/trait-transformer/src/lib.rs
@@ -0,0 +1,17 @@
+// Copyright (c) 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+mod transformer;
+
+#[proc_macro_attribute]
+pub fn trait_transformer(
+    attr: proc_macro::TokenStream,
+    item: proc_macro::TokenStream,
+) -> proc_macro::TokenStream {
+    transformer::trait_transformer(attr, item)
+}
diff --git a/trait-variant/src/transformer.rs b/trait-transformer/src/transformer.rs
similarity index 100%
rename from trait-variant/src/transformer.rs
rename to trait-transformer/src/transformer.rs
diff --git a/trait-variant/src/lib.rs b/trait-variant/src/lib.rs
index f651249..7c03519 100644
--- a/trait-variant/src/lib.rs
+++ b/trait-variant/src/lib.rs
@@ -8,17 +8,8 @@
 
 #![doc = include_str!("../README.md")]
 
-mod transformer;
 mod variant;
 
-#[proc_macro_attribute]
-pub fn trait_transformer(
-    attr: proc_macro::TokenStream,
-    item: proc_macro::TokenStream,
-) -> proc_macro::TokenStream {
-    transformer::trait_transformer(attr, item)
-}
-
 #[proc_macro_attribute]
 pub fn make(
     attr: proc_macro::TokenStream,