diff --git a/packages/devtools/src/app/components/assets/Treemap.vue b/packages/devtools/src/app/components/assets/Treemap.vue
new file mode 100644
index 00000000..5047ac78
--- /dev/null
+++ b/packages/devtools/src/app/components/assets/Treemap.vue
@@ -0,0 +1,249 @@
+<script setup lang="ts">
+import type { Asset as AssetInfo } from '@rolldown/debug'
+import type { GraphBase, GraphBaseOptions } from 'nanovis'
+import type { SessionContext } from '~~/shared/types'
+import type { AssetChartInfo, AssetChartNode } from '~/types/assets'
+import { useRouter } from '#app/composables/router'
+import { useMouse } from '@vueuse/core'
+import { createColorGetterSpectrum, Treemap } from 'nanovis'
+import { computed, nextTick, onUnmounted, reactive, ref, shallowRef, watch } from 'vue'
+import { isDark } from '~/composables/dark'
+import { settings } from '~/state/settings'
+import { bytesToHumanSize } from '~/utils/format'
+
+const props = defineProps<{
+  assets: AssetInfo[]
+  session: SessionContext
+}>()
+
+const router = useRouter()
+const mouse = reactive(useMouse())
+const graph = shallowRef<GraphBase<AssetChartInfo | undefined, GraphBaseOptions<AssetChartInfo | undefined>> | undefined>(undefined)
+const nodeHover = shallowRef<AssetChartNode | undefined>(undefined)
+const nodeSelected = shallowRef<AssetChartNode | undefined>(undefined)
+const selectedNode = ref<AssetChartInfo | undefined>(undefined)
+let dispose: () => void | undefined
+
+const tree = computed(() => {
+  const assets = props.assets
+  const map = new Map<string, AssetChartNode>()
+  let maxDepth = 0
+
+  const root: AssetChartNode = {
+    id: '~root',
+    text: 'Project',
+    size: 0,
+    sizeSelf: 0,
+    children: [],
+  }
+
+  const macrosTasks: (() => void)[] = []
+
+  macrosTasks.unshift(() => {
+    root.size += root.children.reduce((acc, i) => acc + i.size, 0)
+    root.subtext = bytesToHumanSize(root.size).join(' ')
+    root.children.sort((a, b) => b.size - a.size || a.id.localeCompare(b.id))
+  })
+
+  function assetToNode(asset: AssetInfo, path: string, name: string, parent: AssetChartNode, depth: number): AssetChartNode {
+    if (map.has(path)) {
+      return map.get(path)!
+    }
+
+    if (depth > maxDepth) {
+      maxDepth = depth
+    }
+
+    const node: AssetChartNode = {
+      id: path,
+      text: name,
+      size: 0,
+      sizeSelf: 0,
+      children: [],
+      meta: {
+        chunk_id: 0,
+        content: '',
+        filename: '',
+        size: 0,
+        path: name,
+        type: 'folder',
+      },
+      parent,
+    }
+
+    map.set(path, node)
+    parent.children.push(node)
+
+    macrosTasks.unshift(() => {
+      const selfSize = node.sizeSelf
+      node.size += node.children.reduce((acc, i) => acc + i.size, 0)
+      node.subtext = bytesToHumanSize(node.size).join(' ')
+
+      if (node.children.length && selfSize / node.size > 0.1) {
+        node.children.push({
+          id: `${node.id}-self`,
+          text: '',
+          size: selfSize,
+          sizeSelf: selfSize,
+          subtext: bytesToHumanSize(selfSize).join(' '),
+          children: [],
+          meta: {
+            ...asset,
+            path: '',
+            type: 'file',
+          },
+          parent: node,
+        })
+      }
+
+      node.children.sort((a, b) => b.size - a.size || a.id.localeCompare(b.id))
+    })
+
+    return node
+  }
+
+  function processAsset(asset: AssetInfo) {
+    const parts = asset.filename.split('/').filter(Boolean)
+    let current = root
+    let currentPath = ''
+    let depth = 0
+
+    parts.forEach((part, index) => {
+      currentPath += (currentPath ? '/' : '') + part
+      depth++
+
+      if (index === parts.length - 1) {
+        const fileNode: AssetChartNode = {
+          id: asset.filename,
+          text: part,
+          size: asset.size,
+          sizeSelf: asset.size,
+          subtext: bytesToHumanSize(asset.size).join(' '),
+          children: [],
+          meta: {
+            ...asset,
+            path: part,
+            type: 'file',
+          },
+        }
+
+        current.children.push(fileNode)
+        map.set(asset.filename, fileNode)
+      }
+      else {
+        current = assetToNode(asset, currentPath, part, current, depth)
+      }
+    })
+  }
+
+  assets.forEach(processAsset)
+
+  macrosTasks.forEach(fn => fn())
+
+  return {
+    map,
+    root,
+    maxDepth,
+  }
+})
+
+const options = computed<GraphBaseOptions<AssetChartInfo | undefined>>(() => {
+  return {
+    onClick(node) {
+      if (node)
+        nodeHover.value = node
+      if (node.meta?.type === 'file') {
+        selectedNode.value = node.meta
+        router.replace({ query: { asset: node.meta.filename } })
+      }
+    },
+    onHover(node) {
+      if (node)
+        nodeHover.value = node
+    },
+    onLeave() {
+      nodeHover.value = undefined
+    },
+    onSelect(node) {
+      nodeSelected.value = node || tree.value.root
+      selectedNode.value = node?.meta
+    },
+    animate: settings.value.chartAnimation,
+    palette: {
+      stroke: isDark.value ? '#222' : '#555',
+      fg: isDark.value ? '#fff' : '#000',
+      bg: isDark.value ? '#111' : '#fff',
+    },
+    getColor: createColorGetterSpectrum(
+      tree.value.root,
+      isDark.value ? 0.8 : 0.9,
+      isDark.value ? 1 : 1.1,
+    ),
+    getSubtext: (node) => {
+      return node.subtext
+    },
+  }
+})
+
+function selectNode(node: AssetChartNode | null, animate?: boolean) {
+  selectedNode.value = node?.meta
+  if (!node?.children.length)
+    node = node?.parent || null
+  graph.value?.select(node, animate)
+}
+
+watch(() => [tree.value, options.value], () => {
+  dispose?.()
+
+  nodeSelected.value = tree.value.root
+
+  if (tree.value?.root) {
+    graph.value = new Treemap(tree.value.root, {
+      ...options.value,
+      selectedPaddingRatio: 0,
+    })
+  }
+  nextTick(() => {
+    const selected = selectedNode.value ? tree.value.map.get(selectedNode.value.filename) || null : null
+    if (selected)
+      selectNode(selected, false)
+  })
+
+  dispose = () => {
+    graph.value?.dispose()
+    graph.value = undefined
+  }
+}, {
+  deep: true,
+  immediate: true,
+})
+
+onUnmounted(() => {
+  dispose?.()
+})
+</script>
+
+<template>
+  <ChartAssetTreemap
+    v-if="graph"
+    :graph="graph"
+    :selected="nodeSelected"
+    @select="x => selectNode(x)"
+  />
+  <div
+    v-if="nodeHover?.meta"
+    bg-glass fixed z-panel-nav border="~ base rounded" p2 text-sm
+    flex="~ col gap-2"
+    :style="{
+      left: `${mouse.x + 10}px`,
+      top: `${mouse.y + 10}px`,
+    }"
+  >
+    <div flex="~ gap-1 items-center">
+      {{ nodeHover.text }}
+    </div>
+    <div flex="~ gap-1 items-center">
+      <DisplayFileSizeBadge :bytes="nodeHover.size" :percent="false" />
+    </div>
+  </div>
+</template>
diff --git a/packages/devtools/src/app/components/chart/AssetNavBreadcrumb.vue b/packages/devtools/src/app/components/chart/AssetNavBreadcrumb.vue
new file mode 100644
index 00000000..24951dc2
--- /dev/null
+++ b/packages/devtools/src/app/components/chart/AssetNavBreadcrumb.vue
@@ -0,0 +1,38 @@
+<script setup lang="ts">
+import type { GraphBaseOptions } from 'nanovis'
+import type { AssetChartInfo, AssetChartNode } from '~/types/assets'
+import { computed } from 'vue'
+
+const props = defineProps<{
+  selected?: AssetChartNode
+  options: GraphBaseOptions<AssetChartInfo | undefined>
+}>()
+
+const emit = defineEmits<{
+  (e: 'select', node: AssetChartNode | null): void
+}>()
+
+const parentStack = computed(() => {
+  const stack: AssetChartNode[] = []
+  let current = props.selected
+  while (current) {
+    stack.unshift(current)
+    current = current.parent
+  }
+  return stack
+})
+</script>
+
+<template>
+  <div flex="~ gap-1 items-center wrap">
+    <template v-for="node, idx of parentStack" :key="node.id">
+      <div v-if="idx > 0" i-ph-arrow-right-bold text-sm op-fade />
+      <button
+        hover="bg-active" rounded px1
+        @click="emit('select', node)"
+      >
+        <span>{{ node.text || node.id }}</span>
+      </button>
+    </template>
+  </div>
+</template>
diff --git a/packages/devtools/src/app/components/chart/AssetTreemap.vue b/packages/devtools/src/app/components/chart/AssetTreemap.vue
new file mode 100644
index 00000000..129e193d
--- /dev/null
+++ b/packages/devtools/src/app/components/chart/AssetTreemap.vue
@@ -0,0 +1,27 @@
+<script setup lang="ts">
+import type { GraphBase, GraphBaseOptions } from 'nanovis'
+import type { AssetChartInfo, AssetChartNode } from '~/types/assets'
+import { useTemplateRef, watchEffect } from 'vue'
+
+const props = defineProps<{
+  graph: GraphBase<AssetChartInfo | undefined, GraphBaseOptions<AssetChartInfo | undefined>>
+  selected?: AssetChartNode | undefined
+}>()
+
+const emit = defineEmits<{
+  (e: 'select', node: AssetChartNode | null): void
+}>()
+
+const el = useTemplateRef<HTMLDivElement>('el')
+watchEffect(() => el.value?.append(props.graph.el))
+</script>
+
+<template>
+  <ChartAssetNavBreadcrumb
+    border="b base" py2 min-h-10
+    :selected="selected"
+    :options="graph.options"
+    @select="emit('select', $event)"
+  />
+  <div ref="el" />
+</template>
diff --git a/packages/devtools/src/app/pages/session/[session]/assets.vue b/packages/devtools/src/app/pages/session/[session]/assets.vue
index 49654ab5..2c0ac940 100644
--- a/packages/devtools/src/app/pages/session/[session]/assets.vue
+++ b/packages/devtools/src/app/pages/session/[session]/assets.vue
@@ -21,9 +21,9 @@ const assetViewTpyes = [
     icon: 'i-ph-folder-duotone',
   },
   {
-    label: 'Flamechart',
-    value: 'flamechart',
-    icon: 'i-ph-chart-donut-duotone',
+    label: 'Treemap',
+    value: 'treemap',
+    icon: 'i-ph-checkerboard-duotone',
   },
 ] as const
 const rpc = useRpc()
@@ -62,8 +62,8 @@ function toggleDisplay(type: ClientSettings['assetViewType']) {
     <template v-else-if="settings.assetViewType === 'folder'">
       <AssetsFolder v-if="assets?.length" :assets="assets" :session="session" />
     </template>
-    <template v-else>
-      WIP: Flamechart view
+    <template v-else-if="settings.assetViewType === 'treemap'">
+      <AssetsTreemap v-if="assets?.length" :assets="assets" :session="session" />
     </template>
   </div>
 </template>
diff --git a/packages/devtools/src/app/state/settings.ts b/packages/devtools/src/app/state/settings.ts
index 7d27ab6e..4fbd5dce 100644
--- a/packages/devtools/src/app/state/settings.ts
+++ b/packages/devtools/src/app/state/settings.ts
@@ -13,7 +13,8 @@ export interface ClientSettings {
   flowExpandAssets: boolean
   flowShowAllTransforms: boolean
   flowShowAllLoads: boolean
-  assetViewType: 'list' | 'folder' | 'flamechart'
+  assetViewType: 'list' | 'folder' | 'treemap'
+  chartAnimation: boolean
 }
 
 export const settings = useLocalStorage<ClientSettings>(
@@ -30,6 +31,7 @@ export const settings = useLocalStorage<ClientSettings>(
     flowShowAllTransforms: false,
     flowShowAllLoads: false,
     assetViewType: 'list',
+    chartAnimation: true,
   },
   {
     mergeDefaults: true,
diff --git a/packages/devtools/src/app/types/assets.ts b/packages/devtools/src/app/types/assets.ts
new file mode 100644
index 00000000..d3e20c58
--- /dev/null
+++ b/packages/devtools/src/app/types/assets.ts
@@ -0,0 +1,8 @@
+import type { Asset as AssetInfo } from '@rolldown/debug'
+import type { TreeNode } from 'nanovis'
+
+export type AssetChartInfo = AssetInfo & {
+  path: string
+  type: 'folder' | 'file'
+}
+export type AssetChartNode = TreeNode<AssetChartInfo | undefined>