diff --git a/packages/esbuild-plugin-ast/src/__tests__/plugin.spec.ts b/packages/esbuild-plugin-ast/src/__tests__/plugin.spec.ts
index 2cf1dfd..49692c5 100644
--- a/packages/esbuild-plugin-ast/src/__tests__/plugin.spec.ts
+++ b/packages/esbuild-plugin-ast/src/__tests__/plugin.spec.ts
@@ -31,6 +31,7 @@ describe('astParser', () => {
     format: 'esm',
     minify: false,
     write: false,
+    loader: { '.json': 'json' },
     plugins: [astParser(pluginOptions)],
   };
 
@@ -90,4 +91,35 @@ describe('astParser', () => {
       );
     });
   });
+
+  describe('Other file types', () => {
+    beforeAll(() => {
+      entryPoint = join(tmpDir, `/packages/${virtualPackage}/index.js`);
+      testFilePath = `./packages/${virtualPackage}/test-case.json`;
+      testFile = join(tmpDir, testFilePath);
+    });
+
+    beforeEach(async () => {
+      await writeFile(
+        entryPoint,
+        `import testCase from './test-case.json';\ntestCase.${argument};`,
+      );
+
+      ctx = await context({
+        ...esbuildConfig,
+        entryPoints: { index: entryPoint },
+      });
+    });
+
+    it('should not parse and transform file types explicitly handled by other loaders', async () => {
+      const testCase = `{ "${argument}": "value" }`;
+      await writeFile(testFile, testCase);
+
+      const result = await ctx.rebuild();
+
+      expect((result.outputFiles as OutputFile[])[0].text).toEqual(
+        expect.stringContaining('value'),
+      );
+    });
+  });
 });
diff --git a/packages/esbuild-plugin-ast/src/plugin.ts b/packages/esbuild-plugin-ast/src/plugin.ts
index 86b5d36..190e379 100644
--- a/packages/esbuild-plugin-ast/src/plugin.ts
+++ b/packages/esbuild-plugin-ast/src/plugin.ts
@@ -17,6 +17,9 @@ export function astParser({ dependencies, visitor }: AstParserOptions): Plugin {
     name: 'astParser',
     setup(build) {
       const namespace = 'ast-parser';
+      const excludeFileTypes = Object.keys(
+        build.initialOptions.loader || {},
+      ).map((key) => key.slice(1));
 
       /**
        * Use the entry points as starting point for the plugin
@@ -41,6 +44,15 @@ export function astParser({ dependencies, visitor }: AstParserOptions): Plugin {
           resolveDir: dirname(args.importer),
         });
 
+        const fileType = result.path.split('.').pop();
+
+        if (fileType && excludeFileTypes.includes(fileType)) {
+          return {
+            path: result.path,
+            namespace: 'file',
+          };
+        }
+
         return {
           path: result.path,
           namespace,