diff --git a/frontend/src/preview/DocumentViewerPanel.jsx b/frontend/src/preview/DocumentViewerPanel.jsx
index ef37628..2e0a460 100644
--- a/frontend/src/preview/DocumentViewerPanel.jsx
+++ b/frontend/src/preview/DocumentViewerPanel.jsx
@@ -1,10 +1,11 @@
-import React, { useMemo } from 'react';
+import React, { useEffect, useMemo, useState } from 'react';
 import { DownloadIcon, TextScanIcon, AnalyzeIcon, CloseIcon } from '../ui/icons';
 import DocumentSummarySection, {
   buildCorrespondentOptions,
   sortCorrespondents,
 } from '../documents/DocumentSummarySection';
 import { createDocumentActionState } from '../documents/documentActions';
+import { resolveDocumentAssetUrl } from '../asset_manager';
 
 const formatDateTime = (value) => {
   if (!value) {
@@ -27,6 +28,9 @@ const DocumentViewerPanel = ({
   onCorrespondentRemove,
   onUpdateTitle,
   onUpdateIssued,
+  hasOcr = false,
+  ensureAssetUrl,
+  getDocumentAsset,
 }) => {
   const sortedCorrespondents = useMemo(
     () => sortCorrespondents(document?.correspondents || []),
@@ -99,6 +103,63 @@ const DocumentViewerPanel = ({
     return document.metadata;
   }, [document]);
 
+  const [activeTab, setActiveTab] = useState('details');
+  useEffect(() => {
+    setActiveTab('details');
+  }, [document?.id, hasOcr, metadataPayload]);
+
+  const [ocrUrl, setOcrUrl] = useState(null);
+  const [ocrLoading, setOcrLoading] = useState(false);
+  const [ocrError, setOcrError] = useState(null);
+
+  useEffect(() => {
+    let cancelled = false;
+    if (!document || !hasOcr || typeof getDocumentAsset !== 'function') {
+      setOcrUrl(null);
+      setOcrLoading(false);
+      setOcrError(null);
+      return () => {
+        cancelled = true;
+      };
+    }
+
+    const updateUrl = () =>
+      resolveDocumentAssetUrl(document, 'ocr-text', {
+        ensureAssetUrl,
+        getAsset: getDocumentAsset,
+      });
+
+    const asset = getDocumentAsset(document, 'ocr-text');
+
+    const ensureAndUpdate = async () => {
+      setOcrLoading(true);
+      setOcrError(null);
+
+      let url = updateUrl();
+      if (!url && document.id && asset?.id && typeof ensureAssetUrl === 'function') {
+        try {
+          await ensureAssetUrl(document.id, asset, { start: 1, limit: 1 });
+          url = updateUrl();
+        } catch (error) {
+          if (!cancelled) {
+            setOcrError('Unable to load OCR content.');
+          }
+        }
+      }
+
+      if (!cancelled) {
+        setOcrUrl(url);
+        setOcrLoading(false);
+      }
+    };
+
+    ensureAndUpdate();
+
+    return () => {
+      cancelled = true;
+    };
+  }, [document, hasOcr, ensureAssetUrl, getDocumentAsset]);
+
   if (!document) {
     return (
       <section className="document-viewer document-viewer--loading">
@@ -130,23 +191,85 @@ const DocumentViewerPanel = ({
           onUpdateTitle={onUpdateTitle}
           onUpdateIssued={onUpdateIssued}
         />
-        <section className="preview-section">
-          <h3 className="preview-section__title">Metadata</h3>
-          <dl className="preview-section__list">
-            {metadataItems.map(({ label, value }) => (
-              <div className="preview-section__item" key={label}>
-                <dt>{label}</dt>
-                <dd>{value || '—'}</dd>
+        <div className="document-viewer__tabs-wrapper">
+          <div className="document-viewer__tabs" role="tablist" aria-label="Document details">
+            <button
+              type="button"
+              role="tab"
+              aria-selected={activeTab === 'details'}
+              className={`document-viewer__tab${activeTab === 'details' ? ' is-active' : ''}`}
+              onClick={() => setActiveTab('details')}
+            >
+              Details
+            </button>
+            {hasOcr ? (
+              <button
+                type="button"
+                role="tab"
+                aria-selected={activeTab === 'content'}
+                className={`document-viewer__tab${activeTab === 'content' ? ' is-active' : ''}`}
+                onClick={() => setActiveTab('content')}
+              >
+                Content
+              </button>
+            ) : null}
+            {metadataPayload ? (
+              <button
+                type="button"
+                role="tab"
+                aria-selected={activeTab === 'metadata'}
+                className={`document-viewer__tab${activeTab === 'metadata' ? ' is-active' : ''}`}
+                onClick={() => setActiveTab('metadata')}
+              >
+                Metadata
+              </button>
+            ) : null}
+          </div>
+          <div className="document-viewer__tabpanes">
+            {activeTab === 'details' ? (
+              <div role="tabpanel" className="document-viewer__tabpanel">
+                <section className="document-viewer__section">
+                  <dl className="document-viewer__section-list">
+                    {metadataItems.map(({ label, value }) => (
+                      <div className="document-viewer__section-item" key={label}>
+                        <dt>{label}</dt>
+                        <dd>{value || '—'}</dd>
+                      </div>
+                    ))}
+                  </dl>
+                </section>
               </div>
-            ))}
-          </dl>
-          {metadataPayload ? (
-            <details className="preview-section__payload">
-              <summary>Show metadata payload</summary>
-              <pre>{JSON.stringify(metadataPayload, null, 2)}</pre>
-            </details>
-          ) : null}
-        </section>
+            ) : null}
+            {activeTab === 'content' && hasOcr ? (
+              <div role="tabpanel" className="document-viewer__tabpanel">
+                {ocrLoading ? (
+                  <div className="document-viewer__message">Loading OCR content…</div>
+                ) : ocrError ? (
+                  <div className="document-viewer__message document-viewer__message--error">
+                    {ocrError}
+                  </div>
+                ) : ocrUrl ? (
+                  <embed
+                    src={ocrUrl}
+                    type="text/plain"
+                    className="document-viewer__object document-viewer__object--ocr"
+                  />
+                ) : (
+                  <div className="document-viewer__message">No OCR content available.</div>
+                )}
+              </div>
+            ) : null}
+            {activeTab === 'metadata' && metadataPayload ? (
+              <div role="tabpanel" className="document-viewer__tabpanel">
+                <section className="document-viewer__section document-viewer__section--metadata-json">
+                  <pre className="document-viewer__metadata-json">
+                    {JSON.stringify(metadataPayload, null, 2)}
+                  </pre>
+                </section>
+              </div>
+            ) : null}
+          </div>
+        </div>
       </div>
       <div className="document-viewer__viewport">
         {!previewEntry?.url ? (
@@ -163,26 +286,14 @@ export default DocumentViewerPanel;
 
 export const createDocumentViewerHeaderActions = ({
   document,
-  ensureAssetUrl,
-  ensurePreviewData,
-  getDocumentAsset,
-  resolveApiPath,
-  notifyApiError,
+  actionState,
   onRegenerate,
 }) => {
-  if (!document) {
+  if (!document || !actionState) {
     return null;
   }
 
-  const { downloadHref, hasOcr, openOcr } = createDocumentActionState({
-    document,
-    resolveApiPath,
-    ensurePreviewData,
-    ensureAssetUrl,
-    getDocumentAsset,
-    notifyApiError,
-    ocrErrorMessage: 'Unable to open OCR text.',
-  });
+  const { downloadHref, hasOcr, openOcr } = actionState;
 
   return (
     <>
@@ -289,17 +400,25 @@ export const createDocumentViewerSurface = ({
     ];
   }
 
+  const actionState = document
+    ? createDocumentActionState({
+        document,
+        resolveApiPath,
+        ensurePreviewData,
+        ensureAssetUrl,
+        getDocumentAsset,
+        notifyApiError,
+        ocrErrorMessage: 'Unable to open OCR text.',
+      })
+    : null;
+
   const header = {
     title,
     subtitle: null,
     leading,
     actions: createDocumentViewerHeaderActions({
       document,
-      ensureAssetUrl,
-      ensurePreviewData,
-      getDocumentAsset,
-      resolveApiPath,
-      notifyApiError,
+      actionState,
       onRegenerate,
     }),
     breadcrumbs,
@@ -323,6 +442,9 @@ export const createDocumentViewerSurface = ({
         onCorrespondentRemove={onCorrespondentRemove}
         onUpdateTitle={onUpdateTitle}
         onUpdateIssued={onUpdateIssued}
+        hasOcr={Boolean(actionState?.hasOcr)}
+        ensureAssetUrl={ensureAssetUrl}
+        getDocumentAsset={getDocumentAsset}
       />
     ),
     supportsDetail: false,
diff --git a/frontend/src/styles.css b/frontend/src/styles.css
index cfc48ef..fc365ce 100644
--- a/frontend/src/styles.css
+++ b/frontend/src/styles.css
@@ -863,27 +863,34 @@ button.danger:hover:not([disabled]) {
   display: flex;
   flex-direction: column;
   gap: 0.5rem;
-  overflow-y: auto;
+  min-height: 0;
+  flex: 1;
+  overflow: hidden;
+}
+.document-viewer__tabs-wrapper {
+  display: flex;
+  flex-direction: column;
+  flex: 1;
   min-height: 0;
 }
 
-.preview-section {
-  background: var(--surface-subtle);
-  box-shadow: inset 0 0 0 1px var(--outline-subtle);
-  padding: 1.25rem 1.5rem;
+.document-viewer__section {
   display: flex;
   flex-direction: column;
-  gap: 0.75rem;
+  flex: 1;
+  min-height: 0;
+  overflow: auto;
+  padding-top: 1rem;
 }
 
-.preview-section__title {
+.document-viewer__section-title {
   margin: 0;
   font-size: 0.95rem;
   font-weight: 600;
   letter-spacing: 0.01em;
 }
 
-.preview-section__list {
+.document-viewer__section-list {
   margin: 0;
   padding: 0;
   list-style: none;
@@ -892,51 +899,117 @@ button.danger:hover:not([disabled]) {
   gap: 0.75rem 1.25rem;
 }
 
-.preview-section__item {
+.document-viewer__section-item {
   display: flex;
   flex-direction: column;
   gap: 0.25rem;
 }
 
-.preview-section__item dt {
+.document-viewer__section-item dt {
   font-size: 0.75rem;
   color: var(--muted);
 }
 
-.preview-section__item dd {
+.document-viewer__section-item dd {
   margin: 0;
   font-size: 0.9rem;
   font-weight: 500;
   word-break: break-word;
 }
 
-.preview-section__placeholder {
+.document-viewer__section-placeholder {
   margin: 0;
   font-size: 0.9rem;
   color: var(--muted);
 }
 
-.preview-section__payload {
+.document-viewer__section-payload {
   font-size: 0.85rem;
 }
 
-.preview-section__payload summary {
+.document-viewer__section-payload summary {
   cursor: pointer;
   font-weight: 500;
   color: var(--accent-strong, var(--accent));
 }
 
-.preview-section__payload pre {
+.document-viewer__section-payload pre {
   margin: 0.75rem 0 0;
   padding: 0.75rem;
   background: var(--surface);
-  box-shadow: inset 0 0 0 1px var(--outline-subtle);
-  border-radius: 6px;
   max-height: 280px;
   overflow: auto;
   font-size: 0.8rem;
 }
 
+.document-viewer__section--metadata-json {
+  overflow: auto;
+}
+
+.document-viewer__metadata-json {
+  margin: 0;
+  padding: 0.75rem;
+  background: var(--surface);
+  border-radius: 0.5rem;
+  font-size: 0.85rem;
+  line-height: 1.35;
+  overflow: auto;
+}
+
+.document-viewer__tabs {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.5rem;
+  border-bottom: 1px solid var(--outline-subtle);
+}
+
+.document-viewer__tab {
+  appearance: none;
+  border: none;
+  background: transparent;
+  padding: 0.4rem 0.75rem;
+  font-size: 0.85rem;
+  font-weight: 500;
+  color: var(--muted);
+  cursor: pointer;
+  border-bottom: 2px solid transparent;
+  transition:
+    color 120ms ease,
+    border-color 120ms ease;
+}
+
+.document-viewer__tab:hover,
+.document-viewer__tab:focus-visible {
+  color: var(--accent);
+}
+
+.document-viewer__tab.is-active {
+  color: var(--accent);
+  border-color: var(--accent);
+}
+
+.document-viewer__tabpanes {
+  flex: 1;
+  min-height: 0;
+  display: flex;
+}
+
+.document-viewer__tabpanel {
+  flex: 1;
+  min-height: 0;
+  display: flex;
+  position: relative;
+}
+
+.document-viewer__object--ocr {
+  width: 100%;
+  height: 100%;
+}
+
+.document-viewer__message--error {
+  color: var(--danger);
+}
+
 .document-viewer__viewport {
   flex: 1;
   min-width: 0;
@@ -950,7 +1023,6 @@ button.danger:hover:not([disabled]) {
   width: 100%;
   height: 100%;
   border: none;
-  background: #fff;
 }
 
 .document-viewer__object--image {
@@ -959,7 +1031,6 @@ button.danger:hover:not([disabled]) {
   max-width: 100%;
   max-height: 100%;
   object-fit: contain;
-  background: var(--surface);
   align-self: flex-start;
 }