diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index 77843bd..6adc85a 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -9,7 +9,6 @@
       "version": "0.1.1",
       "dependencies": {
         "chart.js": "^4.4.1",
-        "pdfjs-dist": "^6.0.227",
         "vue": "^3.4.21",
         "vue-chartjs": "^5.3.0",
         "vue-router": "^4.6.4"
@@ -568,271 +567,6 @@
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       "license": "MIT"
     },
-    "node_modules/@napi-rs/canvas": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@napi-rs/canvas/-/canvas-1.0.0.tgz",
-      "integrity": "sha512-Jqxcy1XOIqj+lH9sl1GT+il6GR3uQv13vI2mrwubP3uT8Olak2ClDrK2RnxlQKjwv8BRr4b3ug0YR7c6hBX8wg==",
-      "license": "MIT",
-      "optional": true,
-      "workspaces": [
-        "e2e/*"
-      ],
-      "engines": {
-        "node": ">= 10"
-      },
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/Brooooooklyn"
-      },
-      "optionalDependencies": {
-        "@napi-rs/canvas-android-arm64": "1.0.0",
-        "@napi-rs/canvas-darwin-arm64": "1.0.0",
-        "@napi-rs/canvas-darwin-x64": "1.0.0",
-        "@napi-rs/canvas-linux-arm-gnueabihf": "1.0.0",
-        "@napi-rs/canvas-linux-arm64-gnu": "1.0.0",
-        "@napi-rs/canvas-linux-arm64-musl": "1.0.0",
-        "@napi-rs/canvas-linux-riscv64-gnu": "1.0.0",
-        "@napi-rs/canvas-linux-x64-gnu": "1.0.0",
-        "@napi-rs/canvas-linux-x64-musl": "1.0.0",
-        "@napi-rs/canvas-win32-arm64-msvc": "1.0.0",
-        "@napi-rs/canvas-win32-x64-msvc": "1.0.0"
-      }
-    },
-    "node_modules/@napi-rs/canvas-android-arm64": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@napi-rs/canvas-android-arm64/-/canvas-android-arm64-1.0.0.tgz",
-      "integrity": "sha512-3hNKJObUK7JsCF9aJlVCs1J0/KE/gGfZNeK8MO1ge6bB3aicr5walGme9t9No1f/oyk9GgvdAT/rjSdsx3gbIw==",
-      "cpu": [
-        "arm64"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "android"
-      ],
-      "engines": {
-        "node": ">= 10"
-      },
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/Brooooooklyn"
-      }
-    },
-    "node_modules/@napi-rs/canvas-darwin-arm64": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@napi-rs/canvas-darwin-arm64/-/canvas-darwin-arm64-1.0.0.tgz",
-      "integrity": "sha512-ZIja19/BiGz2puhki+WUYSRriwFeFJ8Mi9eK3hZdSS85w4Y60cuEAJVhMCfKwswQkKkUtrnzdKMBuO7TupvexA==",
-      "cpu": [
-        "arm64"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "darwin"
-      ],
-      "engines": {
-        "node": ">= 10"
-      },
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/Brooooooklyn"
-      }
-    },
-    "node_modules/@napi-rs/canvas-darwin-x64": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@napi-rs/canvas-darwin-x64/-/canvas-darwin-x64-1.0.0.tgz",
-      "integrity": "sha512-hImggWc82jqZVpEsFR9S7PE9OQYjq/H/D7vwCGB6X1jRH+UVBP1+1niJTPBOat1B154T6GKK7/kcFtoWgjgFzQ==",
-      "cpu": [
-        "x64"
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-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "darwin"
-      ],
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-        "node": ">= 10"
-      },
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/Brooooooklyn"
-      }
-    },
-    "node_modules/@napi-rs/canvas-linux-arm-gnueabihf": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@napi-rs/canvas-linux-arm-gnueabihf/-/canvas-linux-arm-gnueabihf-1.0.0.tgz",
-      "integrity": "sha512-hlJRy6d+kWLKVOG/+1rEvNQVURZ0DxxRPJsLmEWwhwiXZUJc0BF5o9esALHSEP4CoJK4wChRtj3hnyBgVx2oWA==",
-      "cpu": [
-        "arm"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ],
-      "engines": {
-        "node": ">= 10"
-      },
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/Brooooooklyn"
-      }
-    },
-    "node_modules/@napi-rs/canvas-linux-arm64-gnu": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@napi-rs/canvas-linux-arm64-gnu/-/canvas-linux-arm64-gnu-1.0.0.tgz",
-      "integrity": "sha512-5Hru4T3RXkosRQafcjelv7AUzw9mXqmGYsxnzeDDOWveFCJyEPMSJltvGCM+jfH98seOCbfwm9KyFg6Jm5FhAA==",
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-        "arm64"
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-        "node": ">= 10"
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-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/Brooooooklyn"
-      }
-    },
-    "node_modules/@napi-rs/canvas-linux-arm64-musl": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@napi-rs/canvas-linux-arm64-musl/-/canvas-linux-arm64-musl-1.0.0.tgz",
-      "integrity": "sha512-LTUl9jS8WsLSUGaxQZKQkxfluOJRpgvBuxxdM4pYcjib+di8AU4OzQc6+L6SzGMLcKc9H0RAjojRatBhTMqYdg==",
-      "cpu": [
-        "arm64"
-      ],
-      "libc": [
-        "musl"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ],
-      "engines": {
-        "node": ">= 10"
-      },
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/Brooooooklyn"
-      }
-    },
-    "node_modules/@napi-rs/canvas-linux-riscv64-gnu": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@napi-rs/canvas-linux-riscv64-gnu/-/canvas-linux-riscv64-gnu-1.0.0.tgz",
-      "integrity": "sha512-Iz931SAZf+WVDzpjk52Q3ffW3zw0YflFwEZMgs036Wfu1kX/LrwT9wGjsuSqyduqefUkl91/vTdAjn8hQu5ezA==",
-      "cpu": [
-        "riscv64"
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-        "glibc"
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-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ],
-      "engines": {
-        "node": ">= 10"
-      },
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/Brooooooklyn"
-      }
-    },
-    "node_modules/@napi-rs/canvas-linux-x64-gnu": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@napi-rs/canvas-linux-x64-gnu/-/canvas-linux-x64-gnu-1.0.0.tgz",
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-      "cpu": [
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-      "optional": true,
-      "os": [
-        "linux"
-      ],
-      "engines": {
-        "node": ">= 10"
-      },
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/Brooooooklyn"
-      }
-    },
-    "node_modules/@napi-rs/canvas-linux-x64-musl": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@napi-rs/canvas-linux-x64-musl/-/canvas-linux-x64-musl-1.0.0.tgz",
-      "integrity": "sha512-jnvr8NrLHiZ3NCiOKWqDbkI4Ah+QDrqtZ+sddPZBltEb1mQ2coSvCSJYfict+oAwcm0c970oTmVySpjKP/lnaA==",
-      "cpu": [
-        "x64"
-      ],
-      "libc": [
-        "musl"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ],
-      "engines": {
-        "node": ">= 10"
-      },
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/Brooooooklyn"
-      }
-    },
-    "node_modules/@napi-rs/canvas-win32-arm64-msvc": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@napi-rs/canvas-win32-arm64-msvc/-/canvas-win32-arm64-msvc-1.0.0.tgz",
-      "integrity": "sha512-y2j9/Gfd5joqiqxdP/L1smqjQ+uAx3C4N0EC7bDHrnZEEH8ToM/OC5p3uHvtj4Lq591aHj+ArL01UDLNwT5HgQ==",
-      "cpu": [
-        "arm64"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "win32"
-      ],
-      "engines": {
-        "node": ">= 10"
-      },
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/Brooooooklyn"
-      }
-    },
-    "node_modules/@napi-rs/canvas-win32-x64-msvc": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@napi-rs/canvas-win32-x64-msvc/-/canvas-win32-x64-msvc-1.0.0.tgz",
-      "integrity": "sha512-qwdhh9N6Gge/hC4pL9S1tQp0iKwhSl/dYjg7+RGp9k26iRGRi5MqqUyKGOXIWli0zOcuy5Y2wIH/jk2ry6i/jA==",
-      "cpu": [
-        "x64"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "win32"
-      ],
-      "engines": {
-        "node": ">= 10"
-      },
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/Brooooooklyn"
-      }
-    },
     "node_modules/@nodelib/fs.scandir": {
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
@@ -2187,18 +1921,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/pdfjs-dist": {
-      "version": "6.0.227",
-      "resolved": "https://registry.npmjs.org/pdfjs-dist/-/pdfjs-dist-6.0.227.tgz",
-      "integrity": "sha512-/P6M4SXw+70waMVLUM7rdRtvo+dEzqE1t6W/zQNvBETo2MaRa5rrvCcAYdfWGiUzadTgM0lJmRApUrW0d9zgKg==",
-      "license": "Apache-2.0",
-      "engines": {
-        "node": ">=22.13.0 || >=24"
-      },
-      "optionalDependencies": {
-        "@napi-rs/canvas": "^1.0.0"
-      }
-    },
     "node_modules/picocolors": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.1.1.tgz",
diff --git a/frontend/package.json b/frontend/package.json
index 6979ac3..cd8f38d 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -11,7 +11,6 @@
   },
   "dependencies": {
     "chart.js": "^4.4.1",
-    "pdfjs-dist": "^6.0.227",
     "vue": "^3.4.21",
     "vue-chartjs": "^5.3.0",
     "vue-router": "^4.6.4"
diff --git a/frontend/src/components/PdfPreview.vue b/frontend/src/components/PdfPreview.vue
index 921b83c..50d9b18 100644
--- a/frontend/src/components/PdfPreview.vue
+++ b/frontend/src/components/PdfPreview.vue
@@ -1,53 +1,51 @@
 <template>
-  <div class="flex flex-col h-full bg-gray-950 overflow-hidden relative">
-    <!-- Header -->
-    <div class="flex-shrink-0 flex items-center px-3 py-2 bg-gray-900 border-b border-gray-700 text-white">
-      <span class="text-sm font-medium truncate">{{ fileName }}</span>
+  <div class="flex flex-col h-full bg-gray-950 overflow-hidden">
+    <!-- Bandeau -->
+    <div class="flex-shrink-0 flex items-center gap-2 px-3 py-2 bg-gray-900 border-b border-gray-700 text-white">
+      <span class="text-sm font-medium truncate flex-1">{{ fileName }}</span>
+      <!-- Porte de sortie : si le moteur n'a pas de lecteur PDF intégré, le
+           volet reste vide et ce lien reste le seul moyen d'ouvrir le
+           document. Il sert aussi à le lire en grand sans quitter la page. -->
+      <a
+        v-if="pdfUrl"
+        :href="pdfUrl"
+        target="_blank"
+        rel="noopener"
+        class="flex-shrink-0 p-1 rounded text-gray-400 hover:text-white hover:bg-gray-700 transition-colors"
+        title="Ouvrir le PDF dans un nouvel onglet"
+      >
+        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+          <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 6H6a2 2 0 00-2 2v10a2 2 0 002 2h10a2 2 0 002-2v-4M14 4h6m0 0v6m0-6L10 14" />
+        </svg>
+      </a>
     </div>
 
-    <!-- États -->
-    <div
-      v-if="loading"
-      class="flex-1 flex items-center justify-center text-gray-500 text-sm"
-    >
-      Chargement du PDF…
-    </div>
-    <div
-      v-else-if="error"
-      class="flex-1 flex items-center justify-center px-4 text-center text-red-400 text-sm"
-    >
-      {{ error }}
-    </div>
-    <!-- Rendu PDF.js : une <canvas> par page, empilées et scrollables.
-         Ne dépend pas du lecteur PDF natif du moteur (Qt WebEngine,
-         WebView2, navigateur) -> rendu identique partout. -->
-    <div
-      v-else-if="hasSource"
-      ref="container"
-      class="flex-1 overflow-auto custom-scrollbar p-2 bg-gray-950"
-    />
-    <!-- Empty state -->
-    <div
-      v-else
-      class="flex-1 flex items-center justify-center text-gray-500 text-sm"
-    >
-      Aucun PDF sélectionné
+    <div class="flex-1 relative overflow-hidden">
+      <!-- Lecteur PDF natif du moteur : il apporte le zoom, la recherche, la
+           sélection de texte et l'impression sans code de notre côté, et
+           redessine à chaque niveau de zoom (donc net partout). Un rendu
+           maison sur <canvas> était figé à la largeur du volet, soit 0,83x
+           sur une page A4 dans une fenêtre de 1280 px : les tableaux du CRG
+           en 7 pt tombaient à 6 px de haut, illisibles. -->
+      <iframe
+        v-if="pdfUrl"
+        :key="pdfUrl"
+        :src="urlLecteur"
+        type="application/pdf"
+        :title="fileName"
+        class="absolute inset-0 w-full h-full border-0"
+      />
+
+      <!-- Aucune source -->
+      <div v-else class="h-full flex items-center justify-center text-gray-500 text-sm">
+        Aucun PDF sélectionné
+      </div>
     </div>
   </div>
 </template>
 
 <script setup>
-import { ref, watch, onUnmounted, nextTick } from 'vue'
-// Build « legacy » (et non le build par défaut) : il embarque les polyfills
-// nécessaires aux moteurs Chromium embarqués (Qt WebEngine, WebView2), plus
-// anciens que la dernière version de Chrome. Le build moderne utilise
-// `Map.prototype.getOrInsertComputed` (proposition JS récente) sans polyfill,
-// ce qui casse le rendu dans la fenêtre bureau. Voir docs pdf.js « legacy ».
-import * as pdfjsLib from 'pdfjs-dist/legacy/build/pdf.mjs'
-import PdfWorker from 'pdfjs-dist/legacy/build/pdf.worker.min.mjs?url'
-
-// Worker bundlé localement par Vite (pas de CDN) -> fonctionne hors-ligne.
-pdfjsLib.GlobalWorkerOptions.workerSrc = PdfWorker
+import { computed, ref, watch, onUnmounted } from 'vue'
 
 const props = defineProps({
   file: { type: File, default: null },
@@ -55,92 +53,44 @@ const props = defineProps({
   fileName: { type: String, default: 'document.pdf' }
 })
 
-const container = ref(null)
-const loading = ref(false)
-const error = ref(null)
-const hasSource = ref(false)
+const pdfUrl = ref(null)
+let objectUrl = null
 
-let loadingTask = null
-// Jeton de génération : invalide les rendus concurrents (changement de source).
-let renderToken = 0
+/** Ouverture à l'échelle 1:1. Le zoom par défaut du lecteur intégré tombe vers
+    35-40 % dans un volet étroit, ce qui réduit les tableaux du CRG (7 pt) à
+    3 px de haut. « Ajuster à la largeur » ne sauve rien ici — dans un volet de
+    430 px cela ne donne que 54 %, soit 5 px — alors qu'à 100 % le 7 pt fait
+    9,3 px et redevient lisible, quitte à défiler tant que le volet est étroit.
+    Les mots-clés `page-width`, `view=FitH` et `pagemode=none` sont ignorés par
+    le lecteur de Chrome ; une valeur numérique, elle, est bien honorée
+    (vérifié à la main). Le reste se règle dans le lecteur lui-même : boutons
+    − / + pour le zoom, ☰ pour replier la barre latérale de vignettes. Ces deux
+    choix sont mémorisés par le moteur, d'où le profil persistant imposé à la
+    fenêtre bureau (voir `desktop.py`). */
+const urlLecteur = computed(() => (pdfUrl.value ? `${pdfUrl.value}#zoom=100` : null))
 
-async function resolveSource() {
-  if (props.file) return { data: await props.file.arrayBuffer() }
-  if (props.url) return { url: props.url }
-  return null
-}
-
-async function destroyTask() {
-  if (loadingTask) {
-    try {
-      await loadingTask.destroy()
-    } catch {
-      /* ignore */
-    }
-    loadingTask = null
+function libererObjectUrl() {
+  if (objectUrl) {
+    URL.revokeObjectURL(objectUrl)
+    objectUrl = null
   }
 }
 
-async function render() {
-  const token = ++renderToken
-  error.value = null
-  await destroyTask()
-
-  const source = await resolveSource()
-  hasSource.value = source !== null
-  if (!source) {
-    loading.value = false
-    return
-  }
-
-  loading.value = true
-  try {
-    loadingTask = pdfjsLib.getDocument(source)
-    const doc = await loadingTask.promise
-    if (token !== renderToken) return
-
-    // Le conteneur n'est monté qu'une fois loading=false.
-    loading.value = false
-    await nextTick()
-    const el = container.value
-    if (!el || token !== renderToken) return
-    el.innerHTML = ''
-
-    const targetWidth = Math.max(el.clientWidth - 16, 0)
-    const dpr = window.devicePixelRatio || 1
-
-    for (let n = 1; n <= doc.numPages; n++) {
-      if (token !== renderToken) return
-      const page = await doc.getPage(n)
-      const base = page.getViewport({ scale: 1 })
-      const scale = targetWidth > 0 ? targetWidth / base.width : 1
-      const viewport = page.getViewport({ scale })
-
-      const canvas = document.createElement('canvas')
-      canvas.width = Math.floor(viewport.width * dpr)
-      canvas.height = Math.floor(viewport.height * dpr)
-      canvas.style.width = '100%'
-      canvas.className = 'block mx-auto mb-2 bg-white shadow'
-
-      const ctx = canvas.getContext('2d')
-      ctx.scale(dpr, dpr)
-      await page.render({ canvasContext: ctx, viewport }).promise
-      if (token !== renderToken) return
-      el.appendChild(canvas)
+watch(
+  [() => props.file, () => props.url],
+  ([fichier, url]) => {
+    libererObjectUrl()
+    if (url) {
+      pdfUrl.value = url
+    } else if (fichier) {
+      objectUrl = URL.createObjectURL(fichier)
+      pdfUrl.value = objectUrl
+    } else {
+      pdfUrl.value = null
     }
-  } catch (e) {
-    console.error('[PdfPreview] render error:', e?.message, e)
-    if (token === renderToken) {
-      error.value = "Impossible d'afficher le PDF."
-      loading.value = false
-    }
-  }
-}
+  },
+  { immediate: true }
+)
 
-watch([() => props.file, () => props.url], render, { immediate: true })
-
-onUnmounted(() => {
-  renderToken++
-  destroyTask()
-})
+onUnmounted(libererObjectUrl)
 </script>
diff --git a/frontend/tests/pdfPreview.test.js b/frontend/tests/pdfPreview.test.js
new file mode 100644
index 0000000..4fae22a
--- /dev/null
+++ b/frontend/tests/pdfPreview.test.js
@@ -0,0 +1,44 @@
+// L'apercu sert a relire le compte rendu ligne a ligne pendant qu'on corrige
+// l'extraction : ce qui compte est qu'il s'ouvre a une echelle lisible, pas
+// qu'il tienne entier dans le volet.
+import { describe, expect, it } from 'vitest'
+import { createSSRApp } from 'vue'
+import { renderToString } from 'vue/server-renderer'
+
+import PdfPreview from '../src/components/PdfPreview.vue'
+
+function rendu(proprietes = {}) {
+  return renderToString(createSSRApp(PdfPreview, proprietes))
+}
+
+describe('PdfPreview', () => {
+  it('ouvre le document a l echelle 1:1', async () => {
+    // Le zoom par defaut du lecteur integre tombe vers 35 % dans un volet
+    // etroit, ce qui reduit les tableaux du CRG (7 pt) a 3 px de haut. A 100 %
+    // ils font 9,3 px et redeviennent lisibles, quitte a devoir defiler.
+    const html = await rendu({ url: '/api/documents/37/pdf' })
+
+    expect(html).toContain('/api/documents/37/pdf#zoom=100')
+  })
+
+  it('annonce l absence de document plutot qu un cadre vide', async () => {
+    const html = await rendu()
+
+    expect(html).toContain('Aucun PDF sélectionné')
+    expect(html).not.toContain('<iframe')
+  })
+
+  it('offre d ouvrir le PDF hors du volet', async () => {
+    // Seule issue quand le moteur n'embarque pas de lecteur PDF : sans ce
+    // lien, le volet resterait vide sans recours.
+    const html = await rendu({ url: '/api/documents/37/pdf' })
+
+    expect(html).toContain('target="_blank"')
+  })
+
+  it('affiche le nom du fichier relu', async () => {
+    const html = await rendu({ url: '/api/documents/37/pdf', fileName: '2026 07 Servient.pdf' })
+
+    expect(html).toContain('2026 07 Servient.pdf')
+  })
+})