diff --git a/Cargo.lock b/Cargo.lock
index 974fa34..d90303a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -665,26 +665,12 @@ dependencies = [
  "syn 1.0.109",
 ]
 
-[[package]]
-name = "diff-tool-logic"
-version = "0.0.1"
-dependencies = [
- "clap",
- "indexmap 2.2.3",
- "insta",
- "itertools",
- "serde",
- "thiserror",
- "toml 0.8.10",
- "walkdir",
-]
-
 [[package]]
 name = "diffedit3-gui"
 version = "0.0.1"
 dependencies = [
  "clap",
- "diff-tool-logic",
+ "diffedit3-web",
  "indexmap 2.2.3",
  "serde",
  "serde_json",
@@ -697,15 +683,17 @@ name = "diffedit3-web"
 version = "0.0.1"
 dependencies = [
  "clap",
- "diff-tool-logic",
  "indexmap 2.2.3",
+ "insta",
  "open",
  "poem",
  "rust-embed",
  "serde",
  "thiserror",
  "tokio",
+ "toml 0.8.10",
  "tracing-subscriber",
+ "walkdir",
 ]
 
 [[package]]
@@ -766,12 +754,6 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "56ce8c6da7551ec6c462cbaf3bfbc75131ebbfa1c944aeaa9dab51ca1c5f0c3b"
 
-[[package]]
-name = "either"
-version = "1.10.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11157ac094ffbdde99aa67b23417ebdd801842852b500e395a45a9c0aac03e4a"
-
 [[package]]
 name = "embed-resource"
 version = "2.4.1"
@@ -1590,9 +1572,9 @@ dependencies = [
 
 [[package]]
 name = "insta"
-version = "1.34.0"
+version = "1.35.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5d64600be34b2fcfc267740a243fa7744441bb4947a619ac4e5bb6507f35fbfc"
+checksum = "7c985c1bef99cf13c58fade470483d81a2bfe846ebde60ed28cc2dddec2df9e2"
 dependencies = [
  "console",
  "lazy_static",
@@ -1632,15 +1614,6 @@ dependencies = [
  "once_cell",
 ]
 
-[[package]]
-name = "itertools"
-version = "0.12.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba291022dbbd398a455acf126c1e341954079855bc60dfdda641363bd6922569"
-dependencies = [
- "either",
-]
-
 [[package]]
 name = "itoa"
 version = "0.4.8"
diff --git a/Cargo.toml b/Cargo.toml
index 30d150f..ec4651a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,9 +3,8 @@ version = "0.0.1" # Also update package.json and tauri.conf.json
 edition = "2021"
 
 [workspace]
-members = ["diff-tool-logic", "backend-tauri", "backend-local-server"]
+members = [ "backend-tauri", "backend-local-server"]
 default-members = [
-    "diff-tool-logic",
     "backend-local-server",
     # `cargo build` should ignore the Tauri binary.
     # `cargo tauri build` must be used for that.
diff --git a/backend-local-server/Cargo.toml b/backend-local-server/Cargo.toml
index 4fa1ded..d7df505 100644
--- a/backend-local-server/Cargo.toml
+++ b/backend-local-server/Cargo.toml
@@ -5,7 +5,6 @@ edition = { workspace = true }
 
 [dependencies]
 clap = { version = "4.5.0", features = ["derive"] }
-diff-tool-logic = { path = "../diff-tool-logic" }
 indexmap = { version = "2.2.3", features = ["serde"] }
 open = "5.0.1"
 poem = { version = "2.0.0", features = ["embed"] }
@@ -13,4 +12,14 @@ rust-embed = { version = "8.2.0" }
 serde = { version = "1.0.196", features = ["serde_derive"] }
 thiserror = "1.0.57"
 tokio = { version = "1.36.0", features = ["macros", "rt-multi-thread", "signal"] }
+toml = { version = "0.8.10", features = ["indexmap"] }
 tracing-subscriber = "0.3.18"
+walkdir = "2.4.0"
+
+[dev-dependencies]
+insta = { version = "1.34.0", features = [
+    "redactions",
+    "serde",
+    "yaml",
+    "json",
+] }
diff --git a/backend-local-server/TODO.md b/backend-local-server/TODO.md
deleted file mode 100644
index 2e6c5aa..0000000
--- a/backend-local-server/TODO.md
+++ /dev/null
@@ -1,4 +0,0 @@
-Split the local server into a library, separate from a small binary.
-
-Perhaps combine this into one package with diff-toll-logic, with server features
-perhaps locked behind a feature flag.
\ No newline at end of file
diff --git a/backend-local-server/TODOs.md b/backend-local-server/TODOs.md
new file mode 100644
index 0000000..fa340fd
--- /dev/null
+++ b/backend-local-server/TODOs.md
@@ -0,0 +1,4 @@
+build.rs script to check whether dist changed
+
+Move everything in `backend-local-server` one level up, make it the "diffedit3"
+crate.
\ No newline at end of file
diff --git a/backend-local-server/src/bin/diffedit3-web.rs b/backend-local-server/src/bin/diffedit3-web.rs
index 51072e2..57f90d0 100644
--- a/backend-local-server/src/bin/diffedit3-web.rs
+++ b/backend-local-server/src/bin/diffedit3-web.rs
@@ -6,7 +6,7 @@ use diffedit3_web::local_server::{run_server, MergeToolError};
 #[command(version, about)]
 pub struct LocalServerCli {
     #[command(flatten)]
-    lib_cli: diff_tool_logic::Cli,
+    lib_cli: diffedit3_web::fs::Cli,
     /// Port to use for `http://127.0.0.1`
     #[arg(long, short, default_value = "8080")]
     port: usize,
@@ -37,7 +37,7 @@ fn exit_with_cli_error(s: String) -> ! {
 #[tokio::main]
 async fn main() -> Result<(), MergeToolError> {
     let cli = LocalServerCli::parse();
-    let input: diff_tool_logic::ThreeDirInput = match cli.lib_cli.try_into() {
+    let input: diffedit3_web::fs::ThreeDirInput = match cli.lib_cli.try_into() {
         Ok(i) => i,
         Err(err) => {
             exit_with_cli_error(err.to_string());
diff --git a/diff-tool-logic/src/fs.rs b/backend-local-server/src/fs.rs
similarity index 100%
rename from diff-tool-logic/src/fs.rs
rename to backend-local-server/src/fs.rs
diff --git a/backend-local-server/src/lib.rs b/backend-local-server/src/lib.rs
index 789cdf4..7acebe3 100644
--- a/backend-local-server/src/lib.rs
+++ b/backend-local-server/src/lib.rs
@@ -1 +1,31 @@
+pub mod fs;
+pub mod types;
 pub mod local_server;
+
+pub use fs::{Cli, ThreeDirInput};
+pub use types::*;
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        insta::assert_yaml_snapshot!(ThreeDirInput::FakeData.scan().unwrap(), 
+        @r###"
+        ---
+        added file:
+          - ~
+          - added
+          - added
+        deleted_file:
+          - deleted
+          - ~
+          - ~
+        edited_file:
+          - "First\nThird\nFourth\nFourthAndAHalf\n\nFifth\nSixth\n----\none two"
+          - "First\nSecond\nThird\nFifth\nSixth\n----\none\n"
+          - "First\nSecond\nThird\nFifth\nSixth\n----\none\n"
+        "###);
+    }
+}
diff --git a/backend-local-server/src/local_server.rs b/backend-local-server/src/local_server.rs
index 9f84b1a..7b344ce 100644
--- a/backend-local-server/src/local_server.rs
+++ b/backend-local-server/src/local_server.rs
@@ -2,7 +2,6 @@ use std::io;
 use std::sync::Arc;
 use std::time::Duration;
 
-use diff_tool_logic::DataInterface;
 use poem::endpoint::EmbeddedFilesEndpoint;
 use poem::error::ResponseError;
 use poem::http::StatusCode;
@@ -12,6 +11,8 @@ use poem::web::{Data, Json};
 use poem::{handler, EndpointExt, Result, Route, Server};
 use thiserror::Error;
 
+use crate::DataInterface;
+
 #[derive(rust_embed::RustEmbed)]
 #[folder = "../webapp/dist"]
 struct StaticFiles;
@@ -33,9 +34,9 @@ pub enum MergeToolError {
 #[derive(Debug, Error)]
 enum ServerHTTPError {
     #[error("{0}")]
-    DataReadError(#[from] diff_tool_logic::DataReadError),
+    DataReadError(#[from] crate::DataReadError),
     #[error("{0}")]
-    DataSaveError(#[from] diff_tool_logic::DataSaveError),
+    DataSaveError(#[from] crate::DataSaveError),
     #[error("{0}")]
     FailedToSendExitSignal(tokio::sync::mpsc::error::SendError<ExitCode>),
 }
@@ -50,7 +51,7 @@ type ExitCodeSender = tokio::sync::mpsc::Sender<ExitCode>;
 #[handler]
 fn get_merge_data(
     input: Data<&Arc<Box<dyn DataInterface>>>,
-) -> Result<Json<diff_tool_logic::EntriesToCompare>> {
+) -> Result<Json<crate::EntriesToCompare>> {
     // TODO: We can consider wrapping this IO in `tokio::spawn_blocking`, but it
     // doesn't seem crucial since there shouldn't actually be that much concurrency.
     // The could also be weird side effects.
@@ -104,7 +105,7 @@ fn acceptor_to_socket_address(
 }
 
 pub async fn run_server(
-    input: impl diff_tool_logic::DataInterface,
+    input: impl crate::DataInterface,
     min_port: usize,
     max_port: usize,
     open_browser: bool,
diff --git a/diff-tool-logic/src/types.rs b/backend-local-server/src/types.rs
similarity index 100%
rename from diff-tool-logic/src/types.rs
rename to backend-local-server/src/types.rs
diff --git a/backend-tauri/Cargo.toml b/backend-tauri/Cargo.toml
index 9621924..e09c531 100644
--- a/backend-tauri/Cargo.toml
+++ b/backend-tauri/Cargo.toml
@@ -12,7 +12,7 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 indexmap = { version = "2.2.3", features = ["serde"] }
 clap = { version = "4.5.0", features = ["derive"] }
-diff-tool-logic = { path = "../diff-tool-logic" }
+diffedit3-web = { path = "../backend-local-server" }
 
 [features]
 # this feature is used for production builds or when `devPath` points to the filesystem
diff --git a/backend-tauri/src/main.rs b/backend-tauri/src/main.rs
index 3901fa8..9b7affc 100644
--- a/backend-tauri/src/main.rs
+++ b/backend-tauri/src/main.rs
@@ -4,7 +4,7 @@
 // #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
 use clap::Parser;
-use diff_tool_logic::DataInterface;
+use diffedit3_web::DataInterface;
 use indexmap::IndexMap;
 use tauri::{CustomMenuItem, Menu, Submenu};
 
@@ -25,15 +25,15 @@ fn logoutput(result: IndexMap<String, String>) {
 #[tauri::command]
 fn save(
     result: IndexMap<String, String>,
-    state: tauri::State<diff_tool_logic::ThreeDirInput>,
-) -> Result<(), diff_tool_logic::DataSaveError> {
+    state: tauri::State<diffedit3_web::fs::ThreeDirInput>,
+) -> Result<(), diffedit3_web::DataSaveError> {
     state.save(result)
 }
 
 #[tauri::command]
 fn get_merge_data(
-    state: tauri::State<diff_tool_logic::ThreeDirInput>,
-) -> Result<diff_tool_logic::EntriesToCompare, diff_tool_logic::DataReadError> {
+    state: tauri::State<diffedit3_web::fs::ThreeDirInput>,
+) -> Result<diffedit3_web::EntriesToCompare, diffedit3_web::DataReadError> {
     state.scan()
 }
 
@@ -44,8 +44,8 @@ fn get_merge_data(
 // So far, the most promising approach is to change the `font-size` root
 // CSS property
 fn main() {
-    let cli = diff_tool_logic::Cli::parse();
-    let input: diff_tool_logic::ThreeDirInput = cli.try_into().unwrap_or_else(|err| {
+    let cli = diffedit3_web::Cli::parse();
+    let input: diffedit3_web::ThreeDirInput = cli.try_into().unwrap_or_else(|err| {
         eprintln!("Error: {err}");
         std::process::exit(2)
     });
diff --git a/diff-tool-logic/Cargo.toml b/diff-tool-logic/Cargo.toml
deleted file mode 100644
index 03b55a1..0000000
--- a/diff-tool-logic/Cargo.toml
+++ /dev/null
@@ -1,21 +0,0 @@
-[package]
-name = "diff-tool-logic"
-version = { workspace = true }
-edition = { workspace = true }
-
-[dependencies]
-clap = { version = "4.5.0", features = ["derive"] }
-indexmap = { version = "2.2.3", features = ["serde"] }
-itertools = "0.12.1"
-serde = { version = "1.0.196", features = ["serde_derive"] }
-thiserror = "1.0.57"
-toml = { version = "0.8.10", features = ["indexmap"] }
-walkdir = "2.4.0"
-
-[dev-dependencies]
-insta = { version = "1.34.0", features = [
-    "redactions",
-    "serde",
-    "yaml",
-    "json",
-] }
diff --git a/diff-tool-logic/TODOs.md b/diff-tool-logic/TODOs.md
deleted file mode 100644
index 54c04c5..0000000
--- a/diff-tool-logic/TODOs.md
+++ /dev/null
@@ -1 +0,0 @@
-build.rs script to check whether dist changed
diff --git a/diff-tool-logic/src/lib.rs b/diff-tool-logic/src/lib.rs
deleted file mode 100644
index 49b1950..0000000
--- a/diff-tool-logic/src/lib.rs
+++ /dev/null
@@ -1,30 +0,0 @@
-pub mod fs;
-pub mod types;
-
-pub use fs::{Cli, ThreeDirInput};
-pub use types::*;
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn it_works() {
-        insta::assert_yaml_snapshot!(ThreeDirInput::FakeData.scan().unwrap(), 
-        @r###"
-        ---
-        added file:
-          - ~
-          - added
-          - added
-        deleted_file:
-          - deleted
-          - ~
-          - ~
-        edited_file:
-          - "First\nThird\nFourth\nFourthAndAHalf\n\nFifth\nSixth\n----\none two"
-          - "First\nSecond\nThird\nFifth\nSixth\n----\none\n"
-          - "First\nSecond\nThird\nFifth\nSixth\n----\none\n"
-        "###);
-    }
-}