diff --git a/src/components/CallView/shared/EmptyCallView.vue b/src/components/CallView/shared/EmptyCallView.vue
index 2c74052b2ee..61e667df7b4 100644
--- a/src/components/CallView/shared/EmptyCallView.vue
+++ b/src/components/CallView/shared/EmptyCallView.vue
@@ -43,7 +43,7 @@
 import NcButton from '@nextcloud/vue/dist/Components/NcButton.js'
 
 import { CONVERSATION, PARTICIPANT } from '../../../constants.js'
-import { copyConversationLinkToClipboard } from '../../../services/urlService.js'
+import { copyConversationLinkToClipboard } from '../../../utils/handleUrl.ts'
 
 export default {
 
diff --git a/src/components/ConversationSettings/LinkShareSettings.vue b/src/components/ConversationSettings/LinkShareSettings.vue
index a4c7c4fe9ee..07efe28d927 100644
--- a/src/components/ConversationSettings/LinkShareSettings.vue
+++ b/src/components/ConversationSettings/LinkShareSettings.vue
@@ -103,7 +103,7 @@ import NcCheckboxRadioSwitch from '@nextcloud/vue/dist/Components/NcCheckboxRadi
 import NcPasswordField from '@nextcloud/vue/dist/Components/NcPasswordField.js'
 
 import { CONVERSATION } from '../../constants.js'
-import { copyConversationLinkToClipboard } from '../../services/urlService.js'
+import { copyConversationLinkToClipboard } from '../../utils/handleUrl.ts'
 
 export default {
 	name: 'LinkShareSettings',
diff --git a/src/components/LeftSidebar/ConversationsList/Conversation.vue b/src/components/LeftSidebar/ConversationsList/Conversation.vue
index 60c712e1f13..4cfdf3334d5 100644
--- a/src/components/LeftSidebar/ConversationsList/Conversation.vue
+++ b/src/components/LeftSidebar/ConversationsList/Conversation.vue
@@ -146,7 +146,7 @@ import ConversationIcon from './../../ConversationIcon.vue'
 
 import { useConversationInfo } from '../../../composables/useConversationInfo.js'
 import { PARTICIPANT } from '../../../constants.js'
-import { copyConversationLinkToClipboard } from '../../../services/urlService.js'
+import { copyConversationLinkToClipboard } from '../../../utils/handleUrl.ts'
 
 export default {
 	name: 'Conversation',
diff --git a/src/components/MessagesList/MessagesGroup/Message/Message.vue b/src/components/MessagesList/MessagesGroup/Message/Message.vue
index 2c7692b7073..079a9ec4bcb 100644
--- a/src/components/MessagesList/MessagesGroup/Message/Message.vue
+++ b/src/components/MessagesList/MessagesGroup/Message/Message.vue
@@ -123,7 +123,7 @@ import Reactions from './MessagePart/Reactions.vue'
 import { CONVERSATION, PARTICIPANT } from '../../../../constants.js'
 import { EventBus } from '../../../../services/EventBus.js'
 import { useChatExtrasStore } from '../../../../stores/chatExtras.js'
-import { getItemTypeFromMessage } from '../../../../utils/getItemTypeFromMessage.js'
+import { getItemTypeFromMessage } from '../../../../utils/getItemTypeFromMessage.ts'
 
 const isTranslationAvailable = getCapabilities()?.spreed?.config?.chat?.['has-translation-providers']
 	// Fallback for the desktop client when connecting to Talk 17
diff --git a/src/components/MessagesList/MessagesGroup/Message/MessageButtonsBar/MessageButtonsBar.vue b/src/components/MessagesList/MessagesGroup/Message/MessageButtonsBar/MessageButtonsBar.vue
index bb3a1fb6d56..09eacbcd060 100644
--- a/src/components/MessagesList/MessagesGroup/Message/MessageButtonsBar/MessageButtonsBar.vue
+++ b/src/components/MessagesList/MessagesGroup/Message/MessageButtonsBar/MessageButtonsBar.vue
@@ -304,9 +304,9 @@ import NcEmojiPicker from '@nextcloud/vue/dist/Components/NcEmojiPicker.js'
 
 import { PARTICIPANT, CONVERSATION, ATTENDEE } from '../../../../../constants.js'
 import { getMessageReminder, removeMessageReminder, setMessageReminder } from '../../../../../services/remindersService.js'
-import { copyConversationLinkToClipboard } from '../../../../../services/urlService.js'
 import { useIntegrationsStore } from '../../../../../stores/integrations.js'
 import { useReactionsStore } from '../../../../../stores/reactions.js'
+import { copyConversationLinkToClipboard } from '../../../../../utils/handleUrl.ts'
 import { parseMentions } from '../../../../../utils/textParse.ts'
 
 const EmojiIndex = new EmojiIndexFactory(data)
diff --git a/src/components/NewConversationDialog/NewConversationDialog.vue b/src/components/NewConversationDialog/NewConversationDialog.vue
index 2a8a81c08bc..fe1f434a06d 100644
--- a/src/components/NewConversationDialog/NewConversationDialog.vue
+++ b/src/components/NewConversationDialog/NewConversationDialog.vue
@@ -148,7 +148,7 @@ import {
 	setConversationPassword,
 } from '../../services/conversationsService.js'
 import { addParticipant } from '../../services/participantsService.js'
-import { copyConversationLinkToClipboard } from '../../services/urlService.js'
+import { copyConversationLinkToClipboard } from '../../utils/handleUrl.ts'
 
 const NEW_CONVERSATION = {
 	token: '',
diff --git a/src/components/RightSidebar/Participants/Participant.vue b/src/components/RightSidebar/Participants/Participant.vue
index c8d5171ab81..aeae82f0c3f 100644
--- a/src/components/RightSidebar/Participants/Participant.vue
+++ b/src/components/RightSidebar/Participants/Participant.vue
@@ -378,7 +378,7 @@ import {
 	callSIPSendDTMF,
 } from '../../../services/callsService.js'
 import { formattedTime } from '../../../utils/formattedTime.ts'
-import { readableNumber } from '../../../utils/readableNumber.js'
+import { readableNumber } from '../../../utils/readableNumber.ts'
 import { getStatusMessage } from '../../../utils/userStatus.js'
 
 export default {
diff --git a/src/components/RightSidebar/SipSettings.vue b/src/components/RightSidebar/SipSettings.vue
index a4967494f66..91854c4bafc 100644
--- a/src/components/RightSidebar/SipSettings.vue
+++ b/src/components/RightSidebar/SipSettings.vue
@@ -35,7 +35,7 @@
 <script>
 import { loadState } from '@nextcloud/initial-state'
 
-import { readableNumber } from '../../utils/readableNumber.js'
+import { readableNumber } from '../../utils/readableNumber.ts'
 
 export default {
 	name: 'SipSettings',
diff --git a/src/components/TopBar/TopBarMenu.vue b/src/components/TopBar/TopBarMenu.vue
index 8dfdbd10bd3..3867a7567f0 100644
--- a/src/components/TopBar/TopBarMenu.vue
+++ b/src/components/TopBar/TopBarMenu.vue
@@ -190,7 +190,7 @@ import PromotedView from '../../assets/missingMaterialDesignIcons/PromotedView.v
 
 import { useIsInCall } from '../../composables/useIsInCall.js'
 import { CALL, CONVERSATION, PARTICIPANT } from '../../constants.js'
-import { generateAbsoluteUrl } from '../../services/urlService.js'
+import { generateAbsoluteUrl } from '../../utils/handleUrl.ts'
 import { callParticipantCollection } from '../../utils/webrtc/index.js'
 
 export default {
diff --git a/src/stores/sharedItems.js b/src/stores/sharedItems.js
index b3de307fb99..1225842a414 100644
--- a/src/stores/sharedItems.js
+++ b/src/stores/sharedItems.js
@@ -25,7 +25,7 @@ import { defineStore } from 'pinia'
 import Vue from 'vue'
 
 import { getSharedItemsOverview, getSharedItems } from '../services/sharedItemsService.js'
-import { getItemTypeFromMessage } from '../utils/getItemTypeFromMessage.js'
+import { getItemTypeFromMessage } from '../utils/getItemTypeFromMessage.ts'
 
 /**
  * @typedef {'media'|'file'|'voice'|'audio'|'location'|'deckcard'|'other'} Type
diff --git a/src/types/index.ts b/src/types/index.ts
index d2f1f48ecb6..7459dccf78f 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -45,7 +45,7 @@ export type Mention = ParamObject & {
 	'call-type'?: string,
 	'icon-url'?: string,
 }
-type File = ParamObject & {
+export type File = ParamObject & {
 	'size': number,
 	'path': string,
 	'link': string,
diff --git a/src/utils/__tests__/formattedTime.spec.js b/src/utils/__tests__/formattedTime.spec.js
new file mode 100644
index 00000000000..23493141e6a
--- /dev/null
+++ b/src/utils/__tests__/formattedTime.spec.js
@@ -0,0 +1,19 @@
+import { formattedTime } from '../formattedTime.ts'
+
+const TIME = (61 * 60 + 5) * 1000 // 1 hour, 1 minute, 5 seconds in ms
+
+describe('formattedTime', () => {
+	it('should return the formatted time with optional spacing and padded minutes / seconds', () => {
+		const result = formattedTime(TIME)
+		expect(result).toBe('1 : 01 : 05')
+		const resultCondensed = formattedTime(TIME, true)
+		expect(resultCondensed).toBe('1:01:05')
+	})
+
+	it('should return fallback string when time value is falsy', () => {
+		const result = formattedTime(0)
+		expect(result).toBe('-- : --')
+		const resultCondensed = formattedTime(0, true)
+		expect(resultCondensed).toBe('--:--')
+	})
+})
diff --git a/src/utils/__tests__/getItemTypeFromMessage.spec.js b/src/utils/__tests__/getItemTypeFromMessage.spec.js
new file mode 100644
index 00000000000..e7d484ac23b
--- /dev/null
+++ b/src/utils/__tests__/getItemTypeFromMessage.spec.js
@@ -0,0 +1,41 @@
+import { SHARED_ITEM } from '../../constants.js'
+import { getItemTypeFromMessage } from '../getItemTypeFromMessage.ts'
+
+describe('getItemTypeFromMessage', () => {
+	it('should return the correct item type for a messages', () => {
+		const messages = {
+			1: { messageType: 'comment', messageParameters: { object: { type: 'geo-location' } } },
+			2: { messageType: 'comment', messageParameters: { object: { type: 'deck-card' } } },
+			3: { messageType: 'comment', messageParameters: { object: { type: 'talk-poll' } } },
+			4: { messageType: 'comment', messageParameters: { object: { type: 'some-type' } } },
+			5: { messageType: 'record-audio', messageParameters: { file: { mimetype: 'audio/mp3' } } },
+			6: { messageType: 'record-video', messageParameters: { file: { mimetype: 'video/mp4' } } },
+			7: { messageType: 'voice-message', messageParameters: { file: { mimetype: 'audio/mp3' } } },
+			8: { messageType: 'comment', messageParameters: { file: { mimetype: 'audio/mp3' } } },
+			9: { messageType: 'comment', messageParameters: { file: { mimetype: 'image/jpg' } } },
+			10: { messageType: 'comment', messageParameters: { file: { mimetype: 'video/mp4' } } },
+			11: { messageType: 'comment', messageParameters: { file: { mimetype: 'text/markdown' } } },
+			12: { messageType: 'comment', message: 'simple message' },
+		}
+
+		const outputTypes = {
+			1: SHARED_ITEM.TYPES.LOCATION,
+			2: SHARED_ITEM.TYPES.DECK_CARD,
+			3: SHARED_ITEM.TYPES.POLL,
+			4: SHARED_ITEM.TYPES.OTHER,
+			5: SHARED_ITEM.TYPES.RECORDING,
+			6: SHARED_ITEM.TYPES.RECORDING,
+			7: SHARED_ITEM.TYPES.VOICE,
+			8: SHARED_ITEM.TYPES.AUDIO,
+			9: SHARED_ITEM.TYPES.MEDIA,
+			10: SHARED_ITEM.TYPES.MEDIA,
+			11: SHARED_ITEM.TYPES.FILE,
+			12: SHARED_ITEM.TYPES.OTHER,
+		}
+
+		for (const i in messages) {
+			const type = i + ': ' + getItemTypeFromMessage(messages[i])
+			expect(type).toBe(i + ': ' + outputTypes[i])
+		}
+	})
+})
diff --git a/src/utils/__tests__/handleUrl.spec.js b/src/utils/__tests__/handleUrl.spec.js
new file mode 100644
index 00000000000..d6550915fce
--- /dev/null
+++ b/src/utils/__tests__/handleUrl.spec.js
@@ -0,0 +1,63 @@
+import { showError, showSuccess } from '@nextcloud/dialogs'
+
+import {
+	generateAbsoluteUrl,
+	generateFullConversationLink,
+	copyConversationLinkToClipboard,
+} from '../handleUrl.ts'
+
+jest.mock('@nextcloud/dialogs', () => ({
+	showSuccess: jest.fn(),
+	showError: jest.fn(),
+}))
+
+describe('handleUrl', () => {
+	describe('generateAbsoluteUrl', () => {
+		it('should generate url with IS_DESKTOP=false correctly', () => {
+			const output = generateAbsoluteUrl('/path')
+			expect(output).toBe('http://localhost/nc-webroot/path')
+		})
+
+		it('should generate url with IS_DESKTOP=true correctly', () => {
+			const originalIsDesktop = global.IS_DESKTOP
+			global.IS_DESKTOP = true
+
+			const output = generateAbsoluteUrl('/path')
+			expect(output).toBe('/nc-webroot/path')
+
+			global.IS_DESKTOP = originalIsDesktop
+		})
+	})
+
+	describe('generateFullConversationLink', () => {
+		it('should generate links with given token', () => {
+			const link = generateFullConversationLink('TOKEN')
+			expect(link).toBe('http://localhost/nc-webroot/call/TOKEN')
+		})
+
+		it('should generate links with given token and message id', () => {
+			const link = generateFullConversationLink('TOKEN', '123')
+			expect(link).toBe('http://localhost/nc-webroot/call/TOKEN#message_123')
+		})
+	})
+
+	describe('copyConversationLinkToClipboard', () => {
+		it('should copy the conversation link and show success message', async () => {
+			Object.assign(navigator, { clipboard: { writeText: jest.fn().mockResolvedValueOnce() } })
+
+			await copyConversationLinkToClipboard('TOKEN', '123')
+
+			expect(navigator.clipboard.writeText).toHaveBeenCalledWith('http://localhost/nc-webroot/call/TOKEN#message_123')
+			expect(showSuccess).toHaveBeenCalled()
+		})
+
+		it('should show error message when copying fails', async () => {
+			Object.assign(navigator, { clipboard: { writeText: jest.fn().mockRejectedValueOnce() } })
+
+			await copyConversationLinkToClipboard('TOKEN', '123')
+
+			expect(navigator.clipboard.writeText).toHaveBeenCalledWith('http://localhost/nc-webroot/call/TOKEN#message_123')
+			expect(showError).toHaveBeenCalled()
+		})
+	})
+})
diff --git a/src/utils/__tests__/readableNumber.spec.js b/src/utils/__tests__/readableNumber.spec.js
new file mode 100644
index 00000000000..e412a317b69
--- /dev/null
+++ b/src/utils/__tests__/readableNumber.spec.js
@@ -0,0 +1,61 @@
+import { readableNumber, stringChop } from '../readableNumber.ts'
+
+describe('readableNumber', () => {
+	describe('stringChop', () => {
+		it('should return the correct array of numbers', () => {
+			const numbers = {
+				1: { number: '123456789', size: 3 },
+				2: { number: '12345678', size: 3 },
+				3: { number: '1234567', size: 3 },
+				4: { number: '123456', size: 2 },
+				5: { number: '123456', size: 1 },
+				6: { number: '123456', size: 0 },
+				7: { number: '123456', size: 6 },
+				8: { number: '123456', size: 7 },
+				9: { number: '', size: 3 },
+			}
+
+			const outputTypes = {
+				1: ['123', '456', '789'],
+				2: ['123', '456', '78'],
+				3: ['123', '456', '7'],
+				4: ['12', '34', '56'],
+				5: ['1', '2', '3', '4', '5', '6'],
+				6: ['123456'],
+				7: ['123456'],
+				8: ['123456'],
+				9: [''],
+			}
+
+			for (const i in numbers) {
+				const output = i + ': ' + stringChop(numbers[i].number, numbers[i].size)
+				expect(output).toBe(i + ': ' + outputTypes[i])
+			}
+		})
+	})
+
+	describe('readableNumber', () => {
+		it('should return the correct readable number', () => {
+			const numbers = {
+				1: 123456789,
+				2: '123456789',
+				3: '12345678',
+				4: '1234567',
+				5: '',
+			}
+
+			const outputTypes = {
+				1: '123 456 789',
+				2: '123 456 789',
+				3: '123 456 78',
+				4: '123 4567',
+				5: '',
+			}
+
+			for (const i in numbers) {
+				const output = i + ': ' + readableNumber(numbers[i])
+				expect(output).toBe(i + ': ' + outputTypes[i])
+			}
+		})
+	})
+})
diff --git a/src/utils/getItemTypeFromMessage.js b/src/utils/getItemTypeFromMessage.ts
similarity index 83%
rename from src/utils/getItemTypeFromMessage.js
rename to src/utils/getItemTypeFromMessage.ts
index 0c41aa38ab5..94cef7ea2b8 100644
--- a/src/utils/getItemTypeFromMessage.js
+++ b/src/utils/getItemTypeFromMessage.ts
@@ -1,6 +1,7 @@
 import { SHARED_ITEM } from '../constants.js'
+import type { ChatMessage, File } from '../types'
 
-export const getItemTypeFromMessage = function(message) {
+export const getItemTypeFromMessage = function(message: ChatMessage): string {
 	if (message.messageParameters?.object) {
 		if (message.messageParameters.object.type === 'geo-location') {
 			return SHARED_ITEM.TYPES.LOCATION
@@ -13,7 +14,7 @@ export const getItemTypeFromMessage = function(message) {
 		}
 	} else if (message.messageParameters?.file) {
 		const messageType = message.messageType || ''
-		const mimetype = message.messageParameters.file?.mimetype || ''
+		const mimetype = (message.messageParameters.file as File)?.mimetype || ''
 		if (messageType === 'record-audio' || messageType === 'record-video') {
 			return SHARED_ITEM.TYPES.RECORDING
 		} else if (messageType === 'voice-message') {
diff --git a/src/services/urlService.js b/src/utils/handleUrl.ts
similarity index 61%
rename from src/services/urlService.js
rename to src/utils/handleUrl.ts
index e3f6c7b3ab5..163639b17fe 100644
--- a/src/services/urlService.js
+++ b/src/utils/handleUrl.ts
@@ -21,19 +21,16 @@
 
 import { showError, showSuccess } from '@nextcloud/dialogs'
 import { generateUrl } from '@nextcloud/router'
+import type { UrlOptions } from '@nextcloud/router'
 
 /**
  * Generate a full absolute link with @nextcloud/router.generateUrl
  *
- * @see @nextcloud/router.generateUrl
- * @param {string} url - Path
- * @param {object} [params] parameters to be replaced into the address
- * @param {import('@nextcloud/router').UrlOptions} [options] options for the parameter replacement
- * @param {boolean} options.noRewrite True if you want to force index.php being added
- * @param {boolean} options.escape Set to false if parameters should not be URL encoded (default true)
- * @return {string} Full absolute URL
+ * @param url - path
+ * @param [params] parameters to be replaced into the address
+ * @param [options] options for the parameter replacement
  */
-export function generateAbsoluteUrl(url, params, options) {
+export function generateAbsoluteUrl(url: string, params?: object, options?: UrlOptions): string {
 	// TODO: add this function to @nextcloud/router?
 	const fullPath = generateUrl(url, params, options)
 	if (!IS_DESKTOP) {
@@ -45,29 +42,24 @@ export function generateAbsoluteUrl(url, params, options) {
 }
 
 /**
- * Generate full link to conversation
+ * Generate a full link to conversation
  *
- * @param {string} token - Conversation token
- * @param {string} [messageId] - messageId for message in conversation link
- * @return {string} - Absolute URL to conversation
+ * @param token - Conversation token
+ * @param [messageId] - messageId for message in conversation link
  */
-export function generateFullConversationLink(token, messageId) {
+export function generateFullConversationLink(token: string, messageId?: string): string {
 	return messageId !== undefined
-		? generateAbsoluteUrl('/call/{token}#message_{messageId}', {
-			token,
-			messageId,
-		})
+		? generateAbsoluteUrl('/call/{token}#message_{messageId}', { token, messageId })
 		: generateAbsoluteUrl('/call/{token}', { token })
 }
 
 /**
  * Try to copy conversation link to a clipboard and display the result with dialogs
  *
- * @param {string} token - conversation token
- * @param {string} [messageId] - messageId for message in conversation link
- * @return {Promise<void>}
+ * @param token - conversation token
+ * @param [messageId] - messageId for message in conversation link
  */
-export async function copyConversationLinkToClipboard(token, messageId) {
+export async function copyConversationLinkToClipboard(token: string, messageId: string) {
 	try {
 		await navigator.clipboard.writeText(generateFullConversationLink(token, messageId))
 		showSuccess(t('spreed', 'Conversation link copied to clipboard'))
diff --git a/src/utils/readableNumber.js b/src/utils/readableNumber.ts
similarity index 68%
rename from src/utils/readableNumber.js
rename to src/utils/readableNumber.ts
index a79341e0914..e208bbf7261 100644
--- a/src/utils/readableNumber.js
+++ b/src/utils/readableNumber.ts
@@ -21,14 +21,14 @@
 /**
  * Copied from https://www.w3resource.com/javascript-exercises/javascript-string-exercise-17.php
  *
- * @param {string} str The string to chop
- * @param {number} size Size of the chunks
- * @return {string[]}
+ * @param str The string to chop
+ * @param size Size of the chunks
  */
-function stringChop(str, size) {
-	str = String(str)
-	size = ~~size
-	return size > 0 ? str.match(new RegExp('.{1,' + size + '}', 'g')) : [str]
+function stringChop(str: string, size: number): string[] {
+	if (size <= 0) {
+		return [str]
+	}
+	return str.match(new RegExp('.{1,' + size + '}', 'g')) ?? [str]
 }
 
 /**
@@ -39,18 +39,18 @@ function stringChop(str, size) {
  * 943267028 => 943 267 028
  * 9432670284 => 943 267 0284
  *
- * @param {string} number The number to make readable
- * @return {string}
+ * @param number The number to make readable
  */
-function readableNumber(number) {
-	const chunks = stringChop(number, 3)
+function readableNumber(number: string | number): string {
+	const chunks = stringChop(number.toString(), 3)
+
 	const lastChunk = chunks.pop()
-	if (lastChunk.length === 1) {
-		return chunks.join(' ') + lastChunk
-	}
-	return chunks.join(' ') + ' ' + lastChunk
+	const shouldConcatLastChunk = !lastChunk?.length || lastChunk.length <= 1
+
+	return [chunks.join(' '), lastChunk].join(shouldConcatLastChunk ? '' : ' ')
 }
 
 export {
 	readableNumber,
+	stringChop,
 }