diff --git a/frontend/components/share/SharedFilePreview.vue b/frontend/components/share/SharedFilePreview.vue
new file mode 100644
index 0000000..6759e1f
--- /dev/null
+++ b/frontend/components/share/SharedFilePreview.vue
@@ -0,0 +1,173 @@
+<template>
+    <Teleport to="body">
+        <Transition name="fade" appear>
+            <div
+                v-if="entry"
+                class="fixed inset-0 z-[60] flex items-center justify-center bg-black/80"
+                @click.self="$emit('close')"
+                @keydown.escape="$emit('close')"
+                @keydown.left="$emit('prev')"
+                @keydown.right="$emit('next')"
+                tabindex="0"
+                ref="overlayRef"
+            >
+                <!-- Close button -->
+                <MalioButtonIcon
+                    icon="heroicons:x-mark"
+                    aria-label="Fermer"
+                    variant="ghost"
+                    icon-size="24"
+                    button-class="absolute right-4 top-4 rounded-full bg-black/50 text-white hover:bg-black/70"
+                    @click="$emit('close')"
+                />
+
+                <!-- Navigation arrows -->
+                <MalioButtonIcon
+                    v-if="hasPrev"
+                    icon="heroicons:chevron-left"
+                    aria-label="Précédent"
+                    variant="ghost"
+                    icon-size="24"
+                    button-class="absolute left-4 top-1/2 -translate-y-1/2 rounded-full bg-black/50 text-white hover:bg-black/70"
+                    @click="$emit('prev')"
+                />
+                <MalioButtonIcon
+                    v-if="hasNext"
+                    icon="heroicons:chevron-right"
+                    aria-label="Suivant"
+                    variant="ghost"
+                    icon-size="24"
+                    button-class="absolute right-4 top-1/2 -translate-y-1/2 rounded-full bg-black/50 text-white hover:bg-black/70"
+                    @click="$emit('next')"
+                />
+
+                <!-- Content -->
+                <div class="flex max-h-[90vh] max-w-[90vw] flex-col items-center">
+                    <!-- Image preview -->
+                    <img
+                        v-if="isImage"
+                        :src="inlineUrl"
+                        :alt="entry.name"
+                        class="max-h-[85vh] max-w-[90vw] object-contain"
+                    />
+
+                    <!-- PDF preview — iframe pattern, même approche que TaskDocumentPreview -->
+                    <iframe
+                        v-else-if="isPdf"
+                        :src="inlineUrl"
+                        class="h-[85vh] w-[80vw] rounded-lg bg-white"
+                    />
+
+                    <!-- Text / Markdown / JSON / XML / CSV / Log preview -->
+                    <div
+                        v-else-if="isText"
+                        class="flex max-h-[85vh] w-[85vw] max-w-3xl flex-col overflow-hidden rounded-xl bg-white"
+                    >
+                        <div class="flex items-center justify-between gap-2 border-b border-neutral-200 px-4 py-3">
+                            <p class="truncate text-sm font-medium text-neutral-700">{{ entry.name }}</p>
+                            <a
+                                :href="downloadUrl"
+                                class="inline-flex items-center gap-1.5 rounded-lg bg-blue-600 px-3 py-1.5 text-sm font-semibold text-white transition-colors hover:bg-blue-700"
+                            >
+                                {{ $t('sharedFiles.download') }}
+                            </a>
+                        </div>
+                        <div class="overflow-auto p-4">
+                            <div v-if="loadingText" class="flex justify-center py-10">
+                                <Icon name="heroicons:arrow-path" class="h-6 w-6 animate-spin text-neutral-400" />
+                            </div>
+                            <pre
+                                v-else
+                                class="whitespace-pre-wrap break-words font-mono text-xs leading-relaxed text-neutral-800"
+                            >{{ textContent }}</pre>
+                        </div>
+                    </div>
+
+                    <!-- Generic file — download fallback -->
+                    <div v-else class="flex flex-col items-center gap-4 rounded-xl bg-white p-10">
+                        <Icon name="heroicons:document" class="h-16 w-16 text-neutral-400" />
+                        <p class="max-w-xs truncate text-lg font-medium text-neutral-700">{{ entry.name }}</p>
+                        <p class="text-sm text-neutral-400">{{ formatFileSize(entry.size) }}</p>
+                        <a
+                            :href="downloadUrl"
+                            class="mt-2 rounded-lg bg-blue-600 px-6 py-2 text-sm font-semibold text-white transition-colors hover:bg-blue-700"
+                        >
+                            {{ $t('sharedFiles.download') }}
+                        </a>
+                    </div>
+
+                    <!-- File name footer (hors bloc texte car il a déjà le nom dans l'en-tête) -->
+                    <p v-if="!isText" class="mt-3 text-sm text-white/70">{{ entry.name }}</p>
+                </div>
+            </div>
+        </Transition>
+    </Teleport>
+</template>
+
+<script setup lang="ts">
+import type { FileEntry } from '~/services/dto/share'
+import { useShareService } from '~/services/share'
+import { formatFileSize } from '~/utils/format'
+
+const props = defineProps<{
+    entry: FileEntry | null
+    hasPrev: boolean
+    hasNext: boolean
+}>()
+
+defineEmits<{
+    close: []
+    prev: []
+    next: []
+}>()
+
+const overlayRef = ref<HTMLElement | null>(null)
+const textContent = ref('')
+const loadingText = ref(false)
+
+const { getDownloadUrl } = useShareService()
+
+const TEXT_RE = /\.(md|markdown|txt|csv|json|xml|log)$/i
+
+const inlineUrl = computed(() => props.entry ? getDownloadUrl(props.entry.path, 'inline') : '')
+const downloadUrl = computed(() => props.entry ? getDownloadUrl(props.entry.path, 'attachment') : '')
+const isImage = computed(() => props.entry?.mimeType.startsWith('image/') ?? false)
+const isPdf = computed(() => props.entry?.mimeType === 'application/pdf')
+const isText = computed(() =>
+    props.entry
+        ? (props.entry.mimeType.startsWith('text/') || TEXT_RE.test(props.entry.name))
+        : false
+)
+
+watch(() => props.entry, async (entry) => {
+    textContent.value = ''
+    if (!entry) return
+
+    nextTick(() => overlayRef.value?.focus())
+
+    if (isText.value) {
+        loadingText.value = true
+        try {
+            textContent.value = await $fetch<string>(inlineUrl.value, {
+                credentials: 'include',
+                responseType: 'text' as never,
+            })
+        } catch {
+            textContent.value = ''
+        } finally {
+            loadingText.value = false
+        }
+    }
+}, { immediate: true })
+</script>
+
+<style scoped>
+.fade-enter-active,
+.fade-leave-active {
+    transition: opacity 0.2s ease;
+}
+.fade-enter-from,
+.fade-leave-to {
+    opacity: 0;
+}
+</style>