diff --git a/index.html b/index.html
index 8743d13..b62efa9 100644
--- a/index.html
+++ b/index.html
@@ -35,7 +35,23 @@
     #admin-content .admin-simple-conversation article > .admin-story-player,
     #admin-content .admin-simple-conversation article > .admin-story-reply { display: block; margin-block: .85rem; white-space: pre-wrap; }
     #admin-content .admin-simple-conversation article > .admin-story-player { font-weight: 650; }
-    #admin-content pre { white-space: pre-wrap; overflow-wrap: anywhere; max-height: 32rem; overflow: auto; }
+    #admin-content pre, #debug-trace pre { white-space: pre-wrap; overflow-wrap: anywhere; max-height: 32rem; overflow: auto; }
+    .json-view { box-sizing: border-box; margin-block: .65rem; padding: .8rem; border: 1px solid #cbd5e1; border-radius: .4rem; background: #f8fafc; color: #1e293b; tab-size: 2; font: .84rem/1.55 ui-monospace, SFMono-Regular, Menlo, monospace; }
+    .json-token-key { color: #075985; font-weight: 700; }
+    .json-token-string { color: #166534; }
+    .json-token-number { color: #6d28d9; font-weight: 650; }
+    .json-token-boolean { color: #b45309; font-weight: 750; }
+    .json-token-null { color: #be123c; font-style: italic; }
+    .json-token-punctuation { color: #64748b; }
+    @media (prefers-color-scheme: dark) {
+      .json-view { border-color: #475569; background: #111827; color: #e5e7eb; }
+      .json-token-key { color: #7dd3fc; }
+      .json-token-string { color: #86efac; }
+      .json-token-number { color: #c4b5fd; }
+      .json-token-boolean { color: #fcd34d; }
+      .json-token-null { color: #fda4af; }
+      .json-token-punctuation { color: #94a3b8; }
+    }
     #admin-toolbar { display: flex; flex-wrap: wrap; gap: .5rem; margin-block: 1rem; }
     #player-search { display: flex; flex-wrap: wrap; align-items: end; gap: .5rem; }
     body.debug-layout { max-width: none; margin: 0; padding: .5rem; height: 100vh; overflow: hidden; }
@@ -622,10 +638,43 @@
       parent.append(element);
       return element;
     }
+    function appendFormattedJson(pre, value, stringAsText = false) {
+      pre.className = 'json-view';
+      pre.setAttribute('aria-label', 'Formaterat JSON-svar');
+      const code = document.createElement('code');
+      if (stringAsText && typeof value === 'string') {
+        code.textContent = value;
+        pre.replaceChildren(code);
+        return pre;
+      }
+      const source = JSON.stringify(value, null, '\t') ?? 'null';
+      const tokens = /(\"(?:\\.|[^\"\\])*\"(?=\s*:))|(\"(?:\\.|[^\"\\])*\")|(-?(?:0|[1-9]\d*)(?:\.\d+)?(?:[eE][+-]?\d+)?)|(\btrue\b|\bfalse\b)|(\bnull\b)|([{}\[\],:])|(\s+)/g;
+      let offset = 0;
+      for (const match of source.matchAll(tokens)) {
+        if (match.index > offset) code.append(document.createTextNode(source.slice(offset, match.index)));
+        const token = match[0];
+        if (match[7]) {
+          code.append(document.createTextNode(token));
+        } else {
+          const span = document.createElement('span');
+          span.className = match[1] ? 'json-token-key'
+            : match[2] ? 'json-token-string'
+              : match[3] ? 'json-token-number'
+                : match[4] ? 'json-token-boolean'
+                  : match[5] ? 'json-token-null' : 'json-token-punctuation';
+          span.textContent = token;
+          code.append(span);
+        }
+        offset = match.index + token.length;
+      }
+      if (offset < source.length) code.append(document.createTextNode(source.slice(offset)));
+      pre.replaceChildren(code);
+      return pre;
+    }
     function adminJson(title, value, parent = adminContent) {
       const details = adminElement('details', undefined, parent);
       adminElement('summary', title, details);
-      adminElement('pre', JSON.stringify(value, null, 2), details);
+      appendFormattedJson(adminElement('pre', undefined, details), value);
       return details;
     }
     async function loadAdminPlayers(query = '', offset = 0) {
@@ -1163,7 +1212,7 @@
             const valueHeading = document.createElement('strong');
             valueHeading.textContent = name;
             const pre = document.createElement('pre');
-            pre.textContent = typeof value === 'string' ? value : JSON.stringify(value ?? 'Ingen uppgift sparad', null, 2);
+            appendFormattedJson(pre, value ?? 'Ingen uppgift sparad', true);
             card.append(valueHeading, pre);
           };
           addValue('Indata', input);
@@ -1224,7 +1273,7 @@
         const rawSummary = document.createElement('summary');
         rawSummary.textContent = 'Visa all rå spårdata';
         const pre = document.createElement('pre');
-        pre.textContent = JSON.stringify(group, null, 2);
+        appendFormattedJson(pre, group);
         raw.append(rawSummary, pre);
         details.append(summary, chain, raw);
         debugTrace.append(details);
diff --git a/tests/admin-conversation-trace.test.cjs b/tests/admin-conversation-trace.test.cjs
index 8911467..7b13fc5 100644
--- a/tests/admin-conversation-trace.test.cjs
+++ b/tests/admin-conversation-trace.test.cjs
@@ -42,3 +42,16 @@ test('admin can switch to a storyteller-only reading view and return to diagnost
   assert.match(page, /article > :not\(\.admin-story-player\):not\(\.admin-story-reply\)/);
   assert.match(page, /article > \.admin-story-player,\s*#admin-content \.admin-simple-conversation article > \.admin-story-reply/);
 });
+
+
+test('admin JSON responses use tab-indented syntax-colored accessible output', () => {
+  assert.match(page, /function appendFormattedJson/);
+  assert.match(page, /JSON\.stringify\(value, null, '\\t'\)/);
+  assert.match(page, /json-token-key/);
+  assert.match(page, /json-token-string/);
+  assert.match(page, /json-token-number/);
+  assert.match(page, /json-token-boolean/);
+  assert.match(page, /json-token-null/);
+  assert.match(page, /setAttribute\('aria-label', 'Formaterat JSON-svar'\)/);
+  assert.match(page, /appendFormattedJson\(pre, group\)/);
+});