diff --git a/packages/vite/src/node/__tests__/plugins/esbuild.spec.ts b/packages/vite/src/node/__tests__/plugins/esbuild.spec.ts
index d1c98348c5c453..9a350a46bee5a2 100644
--- a/packages/vite/src/node/__tests__/plugins/esbuild.spec.ts
+++ b/packages/vite/src/node/__tests__/plugins/esbuild.spec.ts
@@ -17,6 +17,7 @@ describe('resolveEsbuildTranspileOptions', () => {
       'es'
     )
     expect(options).toEqual({
+      charset: 'utf8',
       target: 'es2020',
       format: 'esm',
       keepNames: true,
@@ -59,6 +60,7 @@ describe('resolveEsbuildTranspileOptions', () => {
       'es'
     )
     expect(options).toEqual({
+      charset: 'utf8',
       target: undefined,
       format: 'esm',
       keepNames: true,
@@ -88,6 +90,7 @@ describe('resolveEsbuildTranspileOptions', () => {
       'es'
     )
     expect(options).toEqual({
+      charset: 'utf8',
       target: 'es2020',
       format: 'esm',
       keepNames: true,
@@ -119,6 +122,7 @@ describe('resolveEsbuildTranspileOptions', () => {
       'es'
     )
     expect(options).toEqual({
+      charset: 'utf8',
       target: undefined,
       format: 'esm',
       keepNames: true,
@@ -150,6 +154,7 @@ describe('resolveEsbuildTranspileOptions', () => {
       'cjs'
     )
     expect(options).toEqual({
+      charset: 'utf8',
       target: undefined,
       format: 'cjs',
       keepNames: true,
@@ -180,6 +185,7 @@ describe('resolveEsbuildTranspileOptions', () => {
       'es'
     )
     expect(options).toEqual({
+      charset: 'utf8',
       target: undefined,
       format: 'esm',
       keepNames: true,
@@ -214,6 +220,7 @@ describe('resolveEsbuildTranspileOptions', () => {
       'cjs'
     )
     expect(options).toEqual({
+      charset: 'utf8',
       target: undefined,
       format: 'cjs',
       keepNames: true,
diff --git a/packages/vite/src/node/config.ts b/packages/vite/src/node/config.ts
index 4034dfb4d83fcc..9ee81b465b09b0 100644
--- a/packages/vite/src/node/config.ts
+++ b/packages/vite/src/node/config.ts
@@ -116,8 +116,6 @@ export type PluginOption =
   | PluginOption[]
   | Promise<Plugin | false | null | undefined | PluginOption[]>
 
-type Charset = 'ascii' | 'utf8'
-
 export interface UserConfig {
   /**
    * Project root directory. Can be an absolute path, or a path relative from
@@ -154,11 +152,6 @@ export interface UserConfig {
    * each command, and can be overridden by the command line --mode option.
    */
   mode?: string
-  /**
-   * Charset
-   * @default 'utf8'
-   */
-  charset?: Charset
   /**
    * Define global variable replacements.
    * Entries will be defined on `window` during dev and replaced during build.
@@ -637,7 +630,6 @@ export async function resolveConfig(
     resolve: resolveOptions,
     publicDir: resolvedPublicDir,
     cacheDir,
-    charset: config.charset ?? 'utf8',
     command,
     mode,
     ssr,
@@ -666,6 +658,7 @@ export async function resolveConfig(
       ...optimizeDeps,
       esbuildOptions: {
         preserveSymlinks: resolveOptions.preserveSymlinks,
+        charset: optimizeDeps.esbuildOptions?.charset ?? 'utf8',
         ...optimizeDeps.esbuildOptions
       }
     },
diff --git a/packages/vite/src/node/plugins/esbuild.ts b/packages/vite/src/node/plugins/esbuild.ts
index 7304d10bb951d9..a10ebfe6dcab1b 100644
--- a/packages/vite/src/node/plugins/esbuild.ts
+++ b/packages/vite/src/node/plugins/esbuild.ts
@@ -306,9 +306,10 @@ export function resolveEsbuildTranspileOptions(
   // https://github.com/vuejs/core/issues/2860#issuecomment-926882793
   const isEsLibBuild = config.build.lib && format === 'es'
   const esbuildOptions = config.esbuild || {}
+
   const options: TransformOptions = {
+    charset: 'utf8',
     ...esbuildOptions,
-    charset: config.charset,
     target: target || undefined,
     format: rollupToEsbuildFormatMap[format],
     // the final build should always support dynamic import and import.meta.