diff --git a/.changeset/tidy-bugs-yawn.md b/.changeset/tidy-bugs-yawn.md
new file mode 100644
index 000000000000..e395435dcac3
--- /dev/null
+++ b/.changeset/tidy-bugs-yawn.md
@@ -0,0 +1,5 @@
+---
+'create-astro': minor
+---
+
+Ensures new line at the end of the generated `package.json` and `tsconfig.json` files
diff --git a/packages/create-astro/src/actions/typescript.ts b/packages/create-astro/src/actions/typescript.ts
index 169aef7089fe..6fb6c7104af5 100644
--- a/packages/create-astro/src/actions/typescript.ts
+++ b/packages/create-astro/src/actions/typescript.ts
@@ -108,7 +108,7 @@ const FILES_TO_UPDATE = {
 			parsedPackageJson.dependencies['@astrojs/check'] = `^${astroCheckVersion}`;
 			parsedPackageJson.dependencies.typescript = `^${typescriptVersion}`;
 
-			await writeFile(file, JSON.stringify(parsedPackageJson, null, indent), 'utf-8');
+			await writeFile(file, JSON.stringify(parsedPackageJson, null, indent) + '\n', 'utf-8');
 		} catch (err) {
 			// if there's no package.json (which is very unlikely), then do nothing
 			if (err && (err as any).code === 'ENOENT') return;
@@ -124,7 +124,7 @@ const FILES_TO_UPDATE = {
 					extends: `astro/tsconfigs/${options.value}`,
 				});
 
-				await writeFile(file, JSON.stringify(result, null, 2));
+				await writeFile(file, JSON.stringify(result, null, 2) + '\n');
 			} else {
 				throw new Error(
 					"There was an error applying the requested TypeScript settings. This could be because the template's tsconfig.json is malformed",
@@ -135,7 +135,7 @@ const FILES_TO_UPDATE = {
 				// If the template doesn't have a tsconfig.json, let's add one instead
 				await writeFile(
 					file,
-					JSON.stringify({ extends: `astro/tsconfigs/${options.value}` }, null, 2),
+					JSON.stringify({ extends: `astro/tsconfigs/${options.value}` }, null, 2) + '\n',
 				);
 			}
 		}
diff --git a/packages/create-astro/test/typescript.test.js b/packages/create-astro/test/typescript.test.js
index 8787bc509656..b5e09c2c027b 100644
--- a/packages/create-astro/test/typescript.test.js
+++ b/packages/create-astro/test/typescript.test.js
@@ -91,6 +91,7 @@ describe('typescript: setup tsconfig', async () => {
 		assert.deepEqual(JSON.parse(fs.readFileSync(tsconfig, { encoding: 'utf-8' })), {
 			extends: 'astro/tsconfigs/strict',
 		});
+		assert(fs.readFileSync(tsconfig, { encoding: 'utf-8' }).endsWith('\n'), 'The file does not end with a newline');
 	});
 
 	it('exists', async () => {
@@ -100,6 +101,7 @@ describe('typescript: setup tsconfig', async () => {
 		assert.deepEqual(JSON.parse(fs.readFileSync(tsconfig, { encoding: 'utf-8' })), {
 			extends: 'astro/tsconfigs/strict',
 		});
+		assert(fs.readFileSync(tsconfig, { encoding: 'utf-8' }).endsWith('\n'), 'The file does not end with a newline');
 	});
 });
 
@@ -124,6 +126,7 @@ describe('typescript: setup package', async () => {
 		);
 
 		await setupTypeScript('strictest', { cwd: fileURLToPath(root), install: false });
+		assert(fs.readFileSync(packageJson, { encoding: 'utf-8' }).endsWith('\n'), 'The file does not end with a newline');
 		const { scripts, dependencies } = JSON.parse(
 			fs.readFileSync(packageJson, { encoding: 'utf-8' }),
 		);