diff --git a/web/debugger.js b/web/debugger.js
index 7849cc4fb..216e01a22 100644
--- a/web/debugger.js
+++ b/web/debugger.js
@@ -292,6 +292,7 @@ const Stepper = (function StepperClosure() {
       this.breakPoints = initialBreakPoints;
       this.currentIdx = -1;
       this.operatorListIdx = 0;
+      this.indentLevel = 0;
     }
 
     init(operatorList) {
@@ -382,8 +383,14 @@ const Stepper = (function StepperClosure() {
           table.appendChild(charCodeRow);
           table.appendChild(fontCharRow);
           table.appendChild(unicodeRow);
+        } else if (fn === "restore") {
+          this.indentLevel--;
         }
-        line.appendChild(c("td", fn));
+        line.appendChild(c("td", " ".repeat(this.indentLevel * 2) + fn));
+        if (fn === "save") {
+          this.indentLevel++;
+        }
+
         if (decArgs instanceof HTMLElement) {
           line.appendChild(decArgs);
         } else {
diff --git a/web/viewer.css b/web/viewer.css
index 0ed926dd3..5850a8763 100644
--- a/web/viewer.css
+++ b/web/viewer.css
@@ -1707,6 +1707,7 @@ html[dir="rtl"] #documentPropertiesOverlay .row > * {
 }
 #PDFBug table {
   font-size: 10px;
+  white-space: pre;
 }
 #PDFBug table.showText {
   border-collapse: collapse;