diff --git a/.changeset/cuddly-balloons-yawn.md b/.changeset/cuddly-balloons-yawn.md
new file mode 100644
index 00000000..926c5cff
--- /dev/null
+++ b/.changeset/cuddly-balloons-yawn.md
@@ -0,0 +1,6 @@
+---
+"vinxi": patch
+"react-ssr-basic": patch
+---
+
+feat: bundle config file with esbuild before loading, adds support for ts, jsx, etc in config files
diff --git a/packages/vinxi/lib/load-app.js b/packages/vinxi/lib/load-app.js
index 1b9949cc..b2782da9 100644
--- a/packages/vinxi/lib/load-app.js
+++ b/packages/vinxi/lib/load-app.js
@@ -1,11 +1,12 @@
 /// <reference types="bun-types" />
-import { loadConfig } from "c12";
 import { existsSync } from "fs";
+import { rm } from "fs/promises";
+import { isBuiltin } from "module";
 import { fileURLToPath, pathToFileURL } from "url";
 
 import { createApp } from "./app.js";
 import { log } from "./logger.js";
-import { join } from "./path.js";
+import { isAbsolute, join } from "./path.js";
 
 function isBun() {
 	return !!process.versions.bun;
@@ -15,44 +16,97 @@ async function fileExists(path) {
 	return isBun() ? Bun.file(path).exists() : existsSync(path);
 }
 
+const bundleConfigFile = async (configFile, out) => {
+	const esbuild = await import("esbuild");
+
+	// const out = `app.config.timestamp_${Date.now()}.js`;
+	await esbuild.build({
+		entryPoints: [configFile],
+		bundle: true,
+		outfile: out,
+		platform: "node",
+		format: "esm",
+		resolveExtensions: [".js", ".mjs", ".ts", ".jsx", ".tsx"],
+		plugins: [
+			{
+				name: "externalize-deps",
+				setup(build) {
+					build.onResolve(
+						{ filter: /^[^.].*/ },
+						async ({ path: id, importer, kind }) => {
+							if (
+								kind === "entry-point" ||
+								isAbsolute(id) ||
+								id.match(/node:.*/)
+							) {
+								return;
+							}
+
+							// With the `isNodeBuiltin` check above, this check captures if the builtin is a
+							// non-node built-in, which esbuild doesn't know how to handle. In that case, we
+							// externalize it so the non-node runtime handles it instead.
+							if (isBuiltin(id)) {
+								return { external: true };
+							}
+
+							return { external: true };
+						},
+					);
+				},
+			},
+		],
+		loader: {
+			".js": "jsx",
+			".ts": "tsx",
+			".jsx": "jsx",
+			".tsx": "tsx",
+			".mjs": "jsx",
+		},
+	});
+};
+
 async function loadFile({ ...options }) {
 	if (options.name) {
-		for (const ext of ["js", "mjs", "ts"]) {
-			if (ext === "ts" && !isBun()) continue;
-
+		for (const ext of ["js", "mjs", "ts", "tsx", "jsx"]) {
 			const filepath = join(process.cwd(), `${options.name}.config.${ext}`);
 
 			if (await fileExists(filepath)) {
-				return import(
-					pathToFileURL(filepath).href + `?time=${Date.now()}`
-				).then((m) => ({
+				let out = `${options.name}.config.timestamp_${Date.now()}.${ext}`;
+				await bundleConfigFile(`${options.name}.config.${ext}`, out);
+				const importedApp = import(pathToFileURL(out).href).then((m) => ({
 					config: m.default,
 				}));
+
+				await rm(out);
+				return importedApp;
 			}
 		}
+
+		throw new Error(`Config file not found: ${options.name}`);
 	} else if (options.configFile) {
 		const ext = options.configFile.slice(
 			options.configFile.lastIndexOf(".") + 1,
 		);
-		if (["js", "mjs", "ts"].includes(ext) && (ext !== "ts" || isBun())) {
-			const filepath = join(process.cwd(), options.configFile);
+		const configFileName = options.configFile.slice(
+			0,
+			options.configFile.lastIndexOf("."),
+		);
+
+		if (["js", "mjs", "ts", "tsx", "jsx"].includes(ext)) {
+			const filepath = join(process.cwd(), `${configFileName}.${ext}`);
 			if (await fileExists(filepath)) {
-				return import(
-					pathToFileURL(filepath).href + `?time=${Date.now()}`
-				).then((m) => ({
+				let out = `${configFileName}.timestamp_${Date.now()}.${ext}`;
+				await bundleConfigFile(options.configFile, out);
+				const importedApp = import(pathToFileURL(out).href).then((m) => ({
 					config: m.default,
 				}));
+				await rm(out);
+				return importedApp;
 			}
 		}
-	}
 
-	return loadConfig({
-		jitiOptions: {
-			esmResolve: true,
-			nativeModules: ["acorn"],
-		},
-		...options,
-	});
+		throw new Error(`Config file not found: ${options.configFile}`);
+	}
 }
 
 /**
diff --git a/packages/vinxi/lib/nitro-dev.js b/packages/vinxi/lib/nitro-dev.js
index d31d81e5..024004b8 100644
--- a/packages/vinxi/lib/nitro-dev.js
+++ b/packages/vinxi/lib/nitro-dev.js
@@ -186,7 +186,6 @@ export async function createDevServer(nitro) {
 
 	// Dev-only handlers
 	for (const handler of nitro.options.devHandlers) {
-		console.log(handler);
 		app.use(
 			joinURL(nitro.options.runtimeConfig.app.baseURL, handler.route ?? "/"),
 			handler.handler,