diff --git a/frontend/src/lib/components/FlowPreviewContent.svelte b/frontend/src/lib/components/FlowPreviewContent.svelte
index 3c5267917d..cab32403f3 100644
--- a/frontend/src/lib/components/FlowPreviewContent.svelte
+++ b/frontend/src/lib/components/FlowPreviewContent.svelte
@@ -39,6 +39,7 @@
 	import { aiChatManager } from './copilot/chat/AIChatManager.svelte'
 	import { stateSnapshot } from '$lib/svelte5Utils.svelte'
 	import FlowChatInterface from './flows/conversations/FlowChatInterface.svelte'
+	import { randomUUID } from './flows/conversations/FlowChatManager.svelte'
 
 	interface Props {
 		previewMode: 'upTo' | 'whole'
@@ -469,7 +470,7 @@
 							return jobId ?? ''
 						}}
 						createConversation={async () => {
-							const newConversationId = crypto.randomUUID()
+							const newConversationId = randomUUID()
 							return newConversationId
 						}}
 					/>
diff --git a/frontend/src/lib/components/flows/content/FlowInput.svelte b/frontend/src/lib/components/flows/content/FlowInput.svelte
index 7eae608898..bffdd2dcf9 100644
--- a/frontend/src/lib/components/flows/content/FlowInput.svelte
+++ b/frontend/src/lib/components/flows/content/FlowInput.svelte
@@ -49,6 +49,7 @@
 	import { AI_AGENT_SCHEMA } from '../flowInfers'
 	import { nextId } from '../flowModuleNextId'
 	import ConfirmationModal from '$lib/components/common/confirmationModal/ConfirmationModal.svelte'
+	import { randomUUID } from '../conversations/FlowChatManager.svelte'
 
 	interface Props {
 		noEditor: boolean
@@ -491,7 +492,7 @@
 					<FlowChatInterface
 						onRunFlow={runFlowWithMessage}
 						createConversation={async () => {
-							const newConversationId = crypto.randomUUID()
+							const newConversationId = randomUUID()
 							return newConversationId
 						}}
 					/>
diff --git a/frontend/src/lib/components/flows/conversations/FlowChatManager.svelte.ts b/frontend/src/lib/components/flows/conversations/FlowChatManager.svelte.ts
index edde28bbef..8f0948f4ed 100644
--- a/frontend/src/lib/components/flows/conversations/FlowChatManager.svelte.ts
+++ b/frontend/src/lib/components/flows/conversations/FlowChatManager.svelte.ts
@@ -18,6 +18,15 @@ export interface FlowChatManagerOptions {
 	path?: string
 }
 
+export function randomUUID() {
+	// Pure JS (RFC4122 v4) UUID implementation (no external dependencies)
+	return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
+		const r = (Math.random() * 16) | 0
+		const v = c === 'x' ? r : (r & 0x3) | 0x8
+		return v.toString(16)
+	})
+}
+
 class FlowChatManager {
 	// State
 	messages = $state<ChatMessage[]>([])
@@ -320,7 +329,7 @@ class FlowChatManager {
 		delete this.#conversationsCache[currentConversationId]
 
 		const userMessage: ChatMessage = {
-			id: crypto.randomUUID(),
+			id: randomUUID(),
 			content: this.inputMessage.trim(),
 			created_at: new Date().toISOString(),
 			message_type: 'user',
@@ -395,7 +404,6 @@ class FlowChatManager {
 			eventSource.onmessage = async (event) => {
 				try {
 					const data = JSON.parse(event.data)
-					console.log('data', data)
 					if (data.type === 'update') {
 						if (data.flow_stream_job_id) {
 							this.currentJobId = data.flow_stream_job_id
@@ -423,7 +431,7 @@ class FlowChatManager {
 								this.messages = [
 									...this.messages,
 									{
-										id: 'temp-' + crypto.randomUUID(),
+										id: 'temp-' + randomUUID(),
 										content: newContent,
 										created_at: new Date().toISOString(),
 										message_type: 'tool',
@@ -445,7 +453,7 @@ class FlowChatManager {
 								assistantMessageId.length === 0 &&
 								accumulatedContent.length > 0
 							) {
-								assistantMessageId = 'temp-' + crypto.randomUUID()
+								assistantMessageId = 'temp-' + randomUUID()
 								this.messages = [
 									...this.messages,
 									{
diff --git a/frontend/src/routes/(root)/(logged)/flows/get/[...path]/+page.svelte b/frontend/src/routes/(root)/(logged)/flows/get/[...path]/+page.svelte
index 84ceabe2b6..444bed9496 100644
--- a/frontend/src/routes/(root)/(logged)/flows/get/[...path]/+page.svelte
+++ b/frontend/src/routes/(root)/(logged)/flows/get/[...path]/+page.svelte
@@ -65,6 +65,7 @@
 		initFlowGraphAssetsCtx
 	} from '$lib/components/flows/FlowAssetsHandler.svelte'
 	import { page } from '$app/state'
+	import { randomUUID } from '$lib/components/flows/conversations/FlowChatManager.svelte'
 
 	let flow: Flow | undefined = $state()
 	let can_write = false
@@ -401,7 +402,7 @@
 	let path = $derived(page.params.path ?? '')
 
 	async function handleNewConversation({ clearMessages = true }: { clearMessages?: boolean }) {
-		const newConversationId = crypto.randomUUID()
+		const newConversationId = randomUUID()
 
 		// Add the new conversation to the sidebar (returns id of draft or new conversation)
 		if (flowConversationsSidebar) {