diff --git a/src/utils/dataTransfer/DataTransfer.ts b/src/utils/dataTransfer/DataTransfer.ts
index fb13967a..660ebe86 100644
--- a/src/utils/dataTransfer/DataTransfer.ts
+++ b/src/utils/dataTransfer/DataTransfer.ts
@@ -62,15 +62,22 @@ class DataTransferItemListStub
   }
 }
 
+function normalizeFormat(format: string) {
+  return format.toLowerCase()
+}
+
 function getTypeMatcher(type: string, exact: boolean) {
-  const [group, sub] = type.split('/')
+  const normalizedType = normalizeFormat(type)
+  const [group, sub] = normalizedType.split('/')
   const isGroup = !sub || sub === '*'
   return (item: DataTransferItem) => {
+    const normalizedItemType = normalizeFormat(item.type)
+
     return exact
-      ? item.type === (isGroup ? group : type)
+      ? normalizedItemType === (isGroup ? group : normalizedType)
       : isGroup
-      ? item.type.startsWith(`${group}/`)
-      : item.type === group
+      ? normalizedItemType.startsWith(`${group}/`)
+      : normalizedItemType === group
   }
 }
 
diff --git a/tests/clipboard/paste.ts b/tests/clipboard/paste.ts
index cd5eb967..0fa4c608 100644
--- a/tests/clipboard/paste.ts
+++ b/tests/clipboard/paste.ts
@@ -132,6 +132,21 @@ test('should replace selected text all at once', async () => {
   expect(element).toHaveValue('hello friend')
 })
 
+test('should ignore format case', async () => {
+  const {element, user} = setup<HTMLInputElement>('<input />')
+  element.addEventListener('paste', event => {
+    event.preventDefault()
+
+    const data = event.clipboardData?.getData('Text')
+
+    element.value = data ?? ''
+  })
+
+  await user.paste('friend')
+
+  expect(element).toHaveValue('friend')
+})
+
 describe('without Clipboard API', () => {
   beforeEach(() => {
     Object.defineProperty(window.navigator, 'clipboard', {
diff --git a/tests/utils/dataTransfer/DataTransfer.ts b/tests/utils/dataTransfer/DataTransfer.ts
index 7b63b03c..e9e89764 100644
--- a/tests/utils/dataTransfer/DataTransfer.ts
+++ b/tests/utils/dataTransfer/DataTransfer.ts
@@ -23,6 +23,7 @@ describe('create DataTransfer', () => {
     expect(dt.getData('text/html')).toBe('bar')
     expect(dt.getData('text/*')).toBe('foo')
     expect(dt.getData('text')).toBe('foo')
+    expect(dt.getData('Text')).toBe('foo')
 
     dt.clearData()
     dt.setData('text', 'baz')