diff --git a/docs/rules/text-encoding-identifier-case.md b/docs/rules/text-encoding-identifier-case.md
index 7492995349..ba5f7245a3 100644
--- a/docs/rules/text-encoding-identifier-case.md
+++ b/docs/rules/text-encoding-identifier-case.md
@@ -37,3 +37,26 @@ const string = buffer.toString('utf-8');
 // ✅
 const string = buffer.toString('utf8');
 ```
+
+## Options
+
+Type: `object`
+
+### withDash
+
+Type: `boolean`\
+Default: `false`
+
+Use WHATWG standard encoding notation with dashes (e.g., ⁠`utf-8` instead of `⁠utf8`).
+
+```js
+// ❌
+/* eslint unicorn/text-encoding-identifier-case: ["error", {"withDash": true}] */
+await fs.readFile(file, 'utf8');
+```
+
+```js
+// ✅
+/* eslint unicorn/text-encoding-identifier-case: ["error", {"withDash": true}] */
+await fs.readFile(file, 'utf-8');
+```
diff --git a/rules/text-encoding-identifier-case.js b/rules/text-encoding-identifier-case.js
index 5f2b7818fd..037a9d880b 100644
--- a/rules/text-encoding-identifier-case.js
+++ b/rules/text-encoding-identifier-case.js
@@ -8,12 +8,13 @@ const messages = {
 	[MESSAGE_ID_SUGGESTION]: 'Replace `{{value}}` with `{{replacement}}`.',
 };
 
-const getReplacement = encoding => {
+const getReplacement = (encoding, withDash) => {
 	switch (encoding.toLowerCase()) {
 		// eslint-disable-next-line unicorn/text-encoding-identifier-case
 		case 'utf-8':
 		case 'utf8': {
-			return 'utf8';
+			// eslint-disable-next-line unicorn/text-encoding-identifier-case
+			return withDash ? 'utf-8' : 'utf8';
 		}
 
 		case 'ascii': {
@@ -34,8 +35,12 @@ const isFsReadFileEncoding = node =>
 	&& node.parent.arguments[0].type !== 'SpreadElement';
 
 /** @param {import('eslint').Rule.RuleContext} context */
-const create = () => ({
-	Literal(node) {
+const create = context => {
+	const {
+		withDash,
+	} = context.options[0];
+
+	context.on('Literal', node => {
 		if (typeof node.value !== 'string') {
 			return;
 		}
@@ -58,7 +63,7 @@ const create = () => ({
 		const {raw} = node;
 		const value = raw.slice(1, -1);
 
-		const replacement = getReplacement(value);
+		const replacement = getReplacement(value, withDash);
 		if (!replacement || replacement === value) {
 			return;
 		}
@@ -88,8 +93,20 @@ const create = () => ({
 		];
 
 		return problem;
+	});
+};
+
+const schema = [
+	{
+		type: 'object',
+		additionalProperties: false,
+		properties: {
+			withDash: {
+				type: 'boolean',
+			},
+		},
 	},
-});
+];
 
 /** @type {import('eslint').Rule.RuleModule} */
 const config = {
@@ -102,6 +119,10 @@ const config = {
 		},
 		fixable: 'code',
 		hasSuggestions: true,
+		schema,
+		defaultOptions: [{
+			withDash: false,
+		}],
 		messages,
 	},
 };
diff --git a/test/snapshots/text-encoding-identifier-case.js.md b/test/snapshots/text-encoding-identifier-case.js.md
index 4a7984e3fd..00c8858638 100644
--- a/test/snapshots/text-encoding-identifier-case.js.md
+++ b/test/snapshots/text-encoding-identifier-case.js.md
@@ -375,7 +375,7 @@ Generated by [AVA](https://avajs.dev).
         |                         ^^^^^^^ Prefer \`utf8\` over \`UTF-8\`.␊
     `
 
-## invalid(1): <not-meta charset="utf-8" />
+## invalid(20): <not-meta charset="utf-8" />
 
 > Input
 
@@ -394,7 +394,7 @@ Generated by [AVA](https://avajs.dev).
       1 | <not-meta charset="utf8" />␊
     `
 
-## invalid(2): <meta not-charset="utf-8" />
+## invalid(21): <meta not-charset="utf-8" />
 
 > Input
 
@@ -413,7 +413,7 @@ Generated by [AVA](https://avajs.dev).
       1 | <meta not-charset="utf8" />␊
     `
 
-## invalid(3): <meta charset="ASCII" />
+## invalid(22): <meta charset="ASCII" />
 
 > Input
 
@@ -432,7 +432,7 @@ Generated by [AVA](https://avajs.dev).
       1 | <meta charset="ascii" />␊
     `
 
-## invalid(4): <META CHARSET="ASCII" />
+## invalid(23): <META CHARSET="ASCII" />
 
 > Input
 
@@ -450,3 +450,355 @@ Generated by [AVA](https://avajs.dev).
     Suggestion 1/1: Replace \`ASCII\` with \`ascii\`.␊
       1 | <META CHARSET="ascii" />␊
     `
+
+## invalid(1): "UTF-8";
+
+> Input
+
+    `␊
+      1 | "UTF-8";␊
+    `
+
+> Options
+
+    `␊
+    [␊
+      {␊
+        "withDash": true␊
+      }␊
+    ]␊
+    `
+
+> Error 1/1
+
+    `␊
+    > 1 | "UTF-8";␊
+        | ^^^^^^^ Prefer \`utf-8\` over \`UTF-8\`.␊
+    ␊
+    --------------------------------------------------------------------------------␊
+    Suggestion 1/1: Replace \`UTF-8\` with \`utf-8\`.␊
+      1 | "utf-8";␊
+    `
+
+## invalid(2): "UTF8";
+
+> Input
+
+    `␊
+      1 | "UTF8";␊
+    `
+
+> Options
+
+    `␊
+    [␊
+      {␊
+        "withDash": true␊
+      }␊
+    ]␊
+    `
+
+> Error 1/1
+
+    `␊
+    > 1 | "UTF8";␊
+        | ^^^^^^ Prefer \`utf-8\` over \`UTF8\`.␊
+    ␊
+    --------------------------------------------------------------------------------␊
+    Suggestion 1/1: Replace \`UTF8\` with \`utf-8\`.␊
+      1 | "utf-8";␊
+    `
+
+## invalid(3): "utf8";
+
+> Input
+
+    `␊
+      1 | "utf8";␊
+    `
+
+> Options
+
+    `␊
+    [␊
+      {␊
+        "withDash": true␊
+      }␊
+    ]␊
+    `
+
+> Error 1/1
+
+    `␊
+    > 1 | "utf8";␊
+        | ^^^^^^ Prefer \`utf-8\` over \`utf8\`.␊
+    ␊
+    --------------------------------------------------------------------------------␊
+    Suggestion 1/1: Replace \`utf8\` with \`utf-8\`.␊
+      1 | "utf-8";␊
+    `
+
+## invalid(4): 'utf8';
+
+> Input
+
+    `␊
+      1 | 'utf8';␊
+    `
+
+> Options
+
+    `␊
+    [␊
+      {␊
+        "withDash": true␊
+      }␊
+    ]␊
+    `
+
+> Error 1/1
+
+    `␊
+    > 1 | 'utf8';␊
+        | ^^^^^^ Prefer \`utf-8\` over \`utf8\`.␊
+    ␊
+    --------------------------------------------------------------------------------␊
+    Suggestion 1/1: Replace \`utf8\` with \`utf-8\`.␊
+      1 | 'utf-8';␊
+    `
+
+## invalid(5): "Utf8";
+
+> Input
+
+    `␊
+      1 | "Utf8";␊
+    `
+
+> Options
+
+    `␊
+    [␊
+      {␊
+        "withDash": true␊
+      }␊
+    ]␊
+    `
+
+> Error 1/1
+
+    `␊
+    > 1 | "Utf8";␊
+        | ^^^^^^ Prefer \`utf-8\` over \`Utf8\`.␊
+    ␊
+    --------------------------------------------------------------------------------␊
+    Suggestion 1/1: Replace \`Utf8\` with \`utf-8\`.␊
+      1 | "utf-8";␊
+    `
+
+## invalid(6): "ASCII";
+
+> Input
+
+    `␊
+      1 | "ASCII";␊
+    `
+
+> Options
+
+    `␊
+    [␊
+      {␊
+        "withDash": true␊
+      }␊
+    ]␊
+    `
+
+> Error 1/1
+
+    `␊
+    > 1 | "ASCII";␊
+        | ^^^^^^^ Prefer \`ascii\` over \`ASCII\`.␊
+    ␊
+    --------------------------------------------------------------------------------␊
+    Suggestion 1/1: Replace \`ASCII\` with \`ascii\`.␊
+      1 | "ascii";␊
+    `
+
+## invalid(7): fs.readFile(file, "utf8",);
+
+> Input
+
+    `␊
+      1 | fs.readFile(file, "utf8",);␊
+    `
+
+> Options
+
+    `␊
+    [␊
+      {␊
+        "withDash": true␊
+      }␊
+    ]␊
+    `
+
+> Output
+
+    `␊
+      1 | fs.readFile(file, "utf-8",);␊
+    `
+
+> Error 1/1
+
+    `␊
+    > 1 | fs.readFile(file, "utf8",);␊
+        |                   ^^^^^^ Prefer \`utf-8\` over \`utf8\`.␊
+    `
+
+## invalid(8): whatever.readFile(file, "UTF8",)
+
+> Input
+
+    `␊
+      1 | whatever.readFile(file, "UTF8",)␊
+    `
+
+> Options
+
+    `␊
+    [␊
+      {␊
+        "withDash": true␊
+      }␊
+    ]␊
+    `
+
+> Output
+
+    `␊
+      1 | whatever.readFile(file, "utf-8",)␊
+    `
+
+> Error 1/1
+
+    `␊
+    > 1 | whatever.readFile(file, "UTF8",)␊
+        |                         ^^^^^^ Prefer \`utf-8\` over \`UTF8\`.␊
+    `
+
+## invalid(9): <meta charset="utf8" id="with-dash"/>
+
+> Input
+
+    `␊
+      1 | <meta charset="utf8" id="with-dash"/>␊
+    `
+
+> Options
+
+    `␊
+    [␊
+      {␊
+        "withDash": true␊
+      }␊
+    ]␊
+    `
+
+> Error 1/1
+
+    `␊
+    > 1 | <meta charset="utf8" id="with-dash"/>␊
+        |               ^^^^^^ Prefer \`utf-8\` over \`utf8\`.␊
+    ␊
+    --------------------------------------------------------------------------------␊
+    Suggestion 1/1: Replace \`utf8\` with \`utf-8\`.␊
+      1 | <meta charset="utf-8" id="with-dash"/>␊
+    `
+
+## invalid(10): <META CHARSET="utf8" id="with-dash"/>
+
+> Input
+
+    `␊
+      1 | <META CHARSET="utf8" id="with-dash"/>␊
+    `
+
+> Options
+
+    `␊
+    [␊
+      {␊
+        "withDash": true␊
+      }␊
+    ]␊
+    `
+
+> Error 1/1
+
+    `␊
+    > 1 | <META CHARSET="utf8" id="with-dash"/>␊
+        |               ^^^^^^ Prefer \`utf-8\` over \`utf8\`.␊
+    ␊
+    --------------------------------------------------------------------------------␊
+    Suggestion 1/1: Replace \`utf8\` with \`utf-8\`.␊
+      1 | <META CHARSET="utf-8" id="with-dash"/>␊
+    `
+
+## invalid(11): <not-meta charset="utf8" id="with-dash"/>
+
+> Input
+
+    `␊
+      1 | <not-meta charset="utf8" id="with-dash"/>␊
+    `
+
+> Options
+
+    `␊
+    [␊
+      {␊
+        "withDash": true␊
+      }␊
+    ]␊
+    `
+
+> Error 1/1
+
+    `␊
+    > 1 | <not-meta charset="utf8" id="with-dash"/>␊
+        |                   ^^^^^^ Prefer \`utf-8\` over \`utf8\`.␊
+    ␊
+    --------------------------------------------------------------------------------␊
+    Suggestion 1/1: Replace \`utf8\` with \`utf-8\`.␊
+      1 | <not-meta charset="utf-8" id="with-dash"/>␊
+    `
+
+## invalid(12): <meta not-charset="utf8" id="with-dash"/>
+
+> Input
+
+    `␊
+      1 | <meta not-charset="utf8" id="with-dash"/>␊
+    `
+
+> Options
+
+    `␊
+    [␊
+      {␊
+        "withDash": true␊
+      }␊
+    ]␊
+    `
+
+> Error 1/1
+
+    `␊
+    > 1 | <meta not-charset="utf8" id="with-dash"/>␊
+        |                   ^^^^^^ Prefer \`utf-8\` over \`utf8\`.␊
+    ␊
+    --------------------------------------------------------------------------------␊
+    Suggestion 1/1: Replace \`utf8\` with \`utf-8\`.␊
+      1 | <meta not-charset="utf-8" id="with-dash"/>␊
+    `
diff --git a/test/snapshots/text-encoding-identifier-case.js.snap b/test/snapshots/text-encoding-identifier-case.js.snap
index 0e93a762c2..9780210a70 100644
Binary files a/test/snapshots/text-encoding-identifier-case.js.snap and b/test/snapshots/text-encoding-identifier-case.js.snap differ
diff --git a/test/text-encoding-identifier-case.js b/test/text-encoding-identifier-case.js
index 2b0930d659..7b50214065 100644
--- a/test/text-encoding-identifier-case.js
+++ b/test/text-encoding-identifier-case.js
@@ -3,6 +3,15 @@ import {getTester} from './utils/test.js';
 const {test} = getTester(import.meta);
 
 test.snapshot({
+	testerOptions: {
+		languageOptions: {
+			parserOptions: {
+				ecmaFeatures: {
+					jsx: true,
+				},
+			},
+		},
+	},
 	valid: [
 		'`UTF-8`',
 		'"utf8"',
@@ -12,6 +21,8 @@ test.snapshot({
 		String.raw`"\u0055tf8"`,
 		'const ASCII = 1',
 		'const UTF8 = 1',
+		'<meta charset="utf-8" />',
+		'<META CHARSET="utf-8" />',
 	],
 	invalid: [
 		'"UTF-8"',
@@ -33,10 +44,14 @@ test.snapshot({
 		'await fs.readFile(file, "UTF-8",)',
 		'fs.promises.readFile(file, "UTF-8",)',
 		'whatever.readFile(file, "UTF-8",)',
+		'<not-meta charset="utf-8" />',
+		'<meta not-charset="utf-8" />',
+		'<meta charset="ASCII" />',
+		'<META CHARSET="ASCII" />',
 	],
 });
 
-// JSX
+// `withDash` option
 test.snapshot({
 	testerOptions: {
 		languageOptions: {
@@ -48,13 +63,26 @@ test.snapshot({
 		},
 	},
 	valid: [
-		'<meta charset="utf-8" />',
-		'<META CHARSET="utf-8" />',
-	],
+		'`Utf-8`;',
+		'"utf-8";',
+		'"   Utf8   ";',
+		'\'utf-8\';',
+		'const utf8 = 2;',
+		'<meta charset="utf-8" id="with-dash"/>',
+		'<META CHARSET="utf-8" id="with-dash"/>',
+	].map(code => ({code, options: [{withDash: true}]})),
 	invalid: [
-		'<not-meta charset="utf-8" />',
-		'<meta not-charset="utf-8" />',
-		'<meta charset="ASCII" />',
-		'<META CHARSET="ASCII" />',
-	],
+		'"UTF-8";',
+		'"UTF8";',
+		'"utf8";',
+		'\'utf8\';',
+		'"Utf8";',
+		'"ASCII";',
+		'fs.readFile(file, "utf8",);',
+		'whatever.readFile(file, "UTF8",)',
+		'<meta charset="utf8" id="with-dash"/>',
+		'<META CHARSET="utf8" id="with-dash"/>',
+		'<not-meta charset="utf8" id="with-dash"/>',
+		'<meta not-charset="utf8" id="with-dash"/>',
+	].map(code => ({code, options: [{withDash: true}]})),
 });