diff --git a/packages/docusaurus-plugin-client-redirects/src/__tests__/collectRedirects.test.ts b/packages/docusaurus-plugin-client-redirects/src/__tests__/collectRedirects.test.ts
index 2e5e770714..014aa7c10b 100644
--- a/packages/docusaurus-plugin-client-redirects/src/__tests__/collectRedirects.test.ts
+++ b/packages/docusaurus-plugin-client-redirects/src/__tests__/collectRedirects.test.ts
@@ -8,7 +8,7 @@
 import {PluginContext, UserPluginOptions} from '../types';
 import collectRedirects from '../collectRedirects';
 import normalizePluginOptions from '../normalizePluginOptions';
-import {removeTrailingSlash} from '../utils';
+import {removeTrailingSlash} from '@docusaurus/utils';
 
 function createTestPluginContext(
   options?: UserPluginOptions,
diff --git a/packages/docusaurus-plugin-client-redirects/src/__tests__/utils.test.ts b/packages/docusaurus-plugin-client-redirects/src/__tests__/utils.test.ts
deleted file mode 100644
index 8e7cc6a19d..0000000000
--- a/packages/docusaurus-plugin-client-redirects/src/__tests__/utils.test.ts
+++ /dev/null
@@ -1,62 +0,0 @@
-/**
- * Copyright (c) 2017-present, Facebook, Inc.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-import {
-  addTrailingSlash,
-  removeTrailingSlash,
-  removeSuffix,
-  getFilePathForRoutePath,
-} from '../utils';
-
-describe('addTrailingSlash', () => {
-  test('should no-op', () => {
-    expect(addTrailingSlash('/abcd/')).toEqual('/abcd/');
-  });
-  test('should add /', () => {
-    expect(addTrailingSlash('/abcd')).toEqual('/abcd/');
-  });
-});
-
-describe('removeTrailingSlash', () => {
-  test('should no-op', () => {
-    expect(removeTrailingSlash('/abcd')).toEqual('/abcd');
-  });
-  test('should remove /', () => {
-    expect(removeTrailingSlash('/abcd/')).toEqual('/abcd');
-  });
-});
-
-describe('removeSuffix', () => {
-  test('should no-op 1', () => {
-    expect(removeSuffix('abcdef', 'ijk')).toEqual('abcdef');
-  });
-  test('should no-op 2', () => {
-    expect(removeSuffix('abcdef', 'abc')).toEqual('abcdef');
-  });
-  test('should no-op 3', () => {
-    expect(removeSuffix('abcdef', '')).toEqual('abcdef');
-  });
-  test('should remove suffix', () => {
-    expect(removeSuffix('abcdef', 'ef')).toEqual('abcd');
-  });
-});
-
-describe('getFilePathForRoutePath', () => {
-  test('works for /', () => {
-    expect(getFilePathForRoutePath('/')).toEqual('/index.html');
-  });
-  test('works for /somePath', () => {
-    expect(getFilePathForRoutePath('/somePath')).toEqual(
-      '/somePath/index.html',
-    );
-  });
-  test('works for /somePath/', () => {
-    expect(getFilePathForRoutePath('/somePath/')).toEqual(
-      '/somePath/index.html',
-    );
-  });
-});
diff --git a/packages/docusaurus-plugin-client-redirects/src/extensionRedirects.ts b/packages/docusaurus-plugin-client-redirects/src/extensionRedirects.ts
index b82999c07a..df4a7110f2 100644
--- a/packages/docusaurus-plugin-client-redirects/src/extensionRedirects.ts
+++ b/packages/docusaurus-plugin-client-redirects/src/extensionRedirects.ts
@@ -6,7 +6,7 @@
  */
 
 import {flatten} from 'lodash';
-import {removeSuffix} from './utils';
+import {removeSuffix} from '@docusaurus/utils';
 import {RedirectMetadata} from './types';
 
 const ExtensionAdditionalMessage =
diff --git a/packages/docusaurus-plugin-client-redirects/src/utils.ts b/packages/docusaurus-plugin-client-redirects/src/utils.ts
deleted file mode 100644
index 8c082c25e3..0000000000
--- a/packages/docusaurus-plugin-client-redirects/src/utils.ts
+++ /dev/null
@@ -1,30 +0,0 @@
-/**
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-import path from 'path';
-
-export function addTrailingSlash(str: string) {
-  return str.endsWith('/') ? str : `${str}/`;
-}
-
-export function removeTrailingSlash(str: string) {
-  return removeSuffix(str, '/');
-}
-
-export function removeSuffix(str: string, suffix: string) {
-  if (suffix === '') {
-    return str; // always returns "" otherwise!
-  }
-  return str.endsWith(suffix) ? str.slice(0, -suffix.length) : str;
-}
-
-// TODO does this function already exist?
-export function getFilePathForRoutePath(routePath: string) {
-  const fileName = path.basename(routePath);
-  const filePath = path.dirname(routePath);
-  return path.join(filePath, `${fileName}/index.html`);
-}
diff --git a/packages/docusaurus-plugin-client-redirects/src/writeRedirectFiles.ts b/packages/docusaurus-plugin-client-redirects/src/writeRedirectFiles.ts
index 46e0f37947..d8b41a3de9 100644
--- a/packages/docusaurus-plugin-client-redirects/src/writeRedirectFiles.ts
+++ b/packages/docusaurus-plugin-client-redirects/src/writeRedirectFiles.ts
@@ -15,7 +15,7 @@ import {
   addTrailingSlash,
   getFilePathForRoutePath,
   removeTrailingSlash,
-} from './utils';
+} from '@docusaurus/utils';
 
 export type WriteFilesPluginContext = Pick<PluginContext, 'baseUrl' | 'outDir'>;
 
diff --git a/packages/docusaurus-utils/src/__tests__/index.test.ts b/packages/docusaurus-utils/src/__tests__/index.test.ts
index f6a0543207..29cde6684a 100644
--- a/packages/docusaurus-utils/src/__tests__/index.test.ts
+++ b/packages/docusaurus-utils/src/__tests__/index.test.ts
@@ -19,6 +19,10 @@ import {
   aliasedSitePath,
   createExcerpt,
   isValidPathname,
+  addTrailingSlash,
+  removeTrailingSlash,
+  removeSuffix,
+  getFilePathForRoutePath,
 } from '../index';
 
 describe('load utils', () => {
@@ -381,3 +385,52 @@ describe('load utils', () => {
     expect(isValidPathname('//hey')).toBe(false);
   });
 });
+
+describe('addTrailingSlash', () => {
+  test('should no-op', () => {
+    expect(addTrailingSlash('/abcd/')).toEqual('/abcd/');
+  });
+  test('should add /', () => {
+    expect(addTrailingSlash('/abcd')).toEqual('/abcd/');
+  });
+});
+
+describe('removeTrailingSlash', () => {
+  test('should no-op', () => {
+    expect(removeTrailingSlash('/abcd')).toEqual('/abcd');
+  });
+  test('should remove /', () => {
+    expect(removeTrailingSlash('/abcd/')).toEqual('/abcd');
+  });
+});
+
+describe('removeSuffix', () => {
+  test('should no-op 1', () => {
+    expect(removeSuffix('abcdef', 'ijk')).toEqual('abcdef');
+  });
+  test('should no-op 2', () => {
+    expect(removeSuffix('abcdef', 'abc')).toEqual('abcdef');
+  });
+  test('should no-op 3', () => {
+    expect(removeSuffix('abcdef', '')).toEqual('abcdef');
+  });
+  test('should remove suffix', () => {
+    expect(removeSuffix('abcdef', 'ef')).toEqual('abcd');
+  });
+});
+
+describe('getFilePathForRoutePath', () => {
+  test('works for /', () => {
+    expect(getFilePathForRoutePath('/')).toEqual('/index.html');
+  });
+  test('works for /somePath', () => {
+    expect(getFilePathForRoutePath('/somePath')).toEqual(
+      '/somePath/index.html',
+    );
+  });
+  test('works for /somePath/', () => {
+    expect(getFilePathForRoutePath('/somePath/')).toEqual(
+      '/somePath/index.html',
+    );
+  });
+});
diff --git a/packages/docusaurus-utils/src/index.ts b/packages/docusaurus-utils/src/index.ts
index 8ecc4f9f9f..773fe6849b 100644
--- a/packages/docusaurus-utils/src/index.ts
+++ b/packages/docusaurus-utils/src/index.ts
@@ -339,3 +339,24 @@ export function isValidPathname(str: string): boolean {
     return false;
   }
 }
+
+export function addTrailingSlash(str: string) {
+  return str.endsWith('/') ? str : `${str}/`;
+}
+
+export function removeTrailingSlash(str: string) {
+  return removeSuffix(str, '/');
+}
+
+export function removeSuffix(str: string, suffix: string) {
+  if (suffix === '') {
+    return str; // always returns "" otherwise!
+  }
+  return str.endsWith(suffix) ? str.slice(0, -suffix.length) : str;
+}
+
+export function getFilePathForRoutePath(routePath: string) {
+  const fileName = path.basename(routePath);
+  const filePath = path.dirname(routePath);
+  return path.join(filePath, `${fileName}/index.html`);
+}