diff --git a/packages/vite/src/node/__tests__/utils.spec.ts b/packages/vite/src/node/__tests__/utils.spec.ts
new file mode 100644
index 00000000000000..afe6f3cd796edb
--- /dev/null
+++ b/packages/vite/src/node/__tests__/utils.spec.ts
@@ -0,0 +1,37 @@
+import { injectQuery } from '../utils'
+
+test('normalize windows path', () => {
+  expect(injectQuery('C:\\User\\Vite\\Project', 'direct')).toEqual(
+    'C:/User/Vite/Project?direct'
+  )
+})
+
+test('path with multiple spaces', () => {
+  expect(injectQuery('/usr/vite/path with space', 'direct')).toEqual(
+    '/usr/vite/path with space?direct'
+  )
+})
+
+test('path with multiple % characters', () => {
+  expect(injectQuery('/usr/vite/not%20a%20space', 'direct')).toEqual(
+    '/usr/vite/not%20a%20space?direct'
+  )
+})
+
+test('path with %25', () => {
+  expect(injectQuery('/usr/vite/%25hello%25', 'direct')).toEqual(
+    '/usr/vite/%25hello%25?direct'
+  )
+})
+
+test('path with unicode', () => {
+  expect(injectQuery('/usr/vite/東京', 'direct')).toEqual(
+    '/usr/vite/東京?direct'
+  )
+})
+
+test('path with unicode, space, and %', () => {
+  expect(injectQuery('/usr/vite/東京 %20 hello', 'direct')).toEqual(
+    '/usr/vite/東京 %20 hello?direct'
+  )
+})
diff --git a/packages/vite/src/node/utils.ts b/packages/vite/src/node/utils.ts
index 1c728af6c3d9e8..79ad4c033fd624 100644
--- a/packages/vite/src/node/utils.ts
+++ b/packages/vite/src/node/utils.ts
@@ -124,7 +124,7 @@ export function removeImportQuery(url: string) {
 }
 
 export function injectQuery(url: string, queryToInject: string) {
-  let resolvedUrl = new URL(url, 'relative:///')
+  let resolvedUrl = new URL(url.replace(/%/g, '%25'), 'relative:///')
   if (resolvedUrl.protocol !== 'relative:') {
     resolvedUrl = pathToFileURL(url)
   }
@@ -132,6 +132,7 @@ export function injectQuery(url: string, queryToInject: string) {
   if (protocol === 'file:') {
     pathname = pathname.slice(1)
   }
+  pathname = decodeURIComponent(pathname)
   return `${pathname}?${queryToInject}${search ? `&` + search.slice(1) : ''}${
     hash || ''
   }`