diff --git a/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php b/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php
index 28cf669930..1e4ac12146 100644
--- a/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php
+++ b/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php
@@ -44,6 +44,7 @@ class HtmlDumper extends CliDumper
         'key' => 'color:#56DB3A',
         'index' => 'color:#1299DA',
         'ellipsis' => 'color:#FF8400',
+        'ns' => 'user-select:none;',
     );
 
     private $displayOptions = array(
@@ -837,9 +838,21 @@ EOHTML
         }
 
         $v = "<span class=sf-dump-{$style}>".preg_replace_callback(static::$controlCharsRx, function ($c) use ($map) {
-            $s = '<span class=sf-dump-default>';
+            $s = $b = '<span class="sf-dump-default';
             $c = $c[$i = 0];
+            if ($ns = "\r" === $c[$i] || "\n" === $c[$i])) {
+                $s .= ' sf-dump-ns';
+            }
+            $s .= '">';
             do {
+                if (("\r" === $c[$i] || "\n" === $c[$i]) !== $ns) {
+                    $s .= '</span>'.$b;
+                    if ($ns = !$ns) {
+                        $s .= ' sf-dump-ns';
+                    }
+                    $s .= '">';
+                }
+
                 $s .= isset($map[$c[$i]]) ? $map[$c[$i]] : sprintf('\x%02X', ord($c[$i]));
             } while (isset($c[++$i]));
 
diff --git a/src/Symfony/Component/VarDumper/Resources/css/htmlDescriptor.css b/src/Symfony/Component/VarDumper/Resources/css/htmlDescriptor.css
index 4277c6809b..df719222dc 100644
--- a/src/Symfony/Component/VarDumper/Resources/css/htmlDescriptor.css
+++ b/src/Symfony/Component/VarDumper/Resources/css/htmlDescriptor.css
@@ -127,3 +127,4 @@ pre.sf-dump {
 .dumped-tag > .sf-dump .sf-dump-ref { color: #6E6E6E; }
 .dumped-tag > .sf-dump .sf-dump-ellipsis { color: #CC7832; max-width: 100em; }
 .dumped-tag > .sf-dump .sf-dump-ellipsis-path { max-width: 5em; }
+.dumped-tag > .sf-dump .sf-dump-ns { user-select: none; }
diff --git a/src/Symfony/Component/VarDumper/Tests/Dumper/CliDumperTest.php b/src/Symfony/Component/VarDumper/Tests/Dumper/CliDumperTest.php
index 85b0ac05b0..919d4e4a78 100644
--- a/src/Symfony/Component/VarDumper/Tests/Dumper/CliDumperTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Dumper/CliDumperTest.php
@@ -61,7 +61,10 @@ array:24 [
   5 => -INF
   6 => {$intMax}
   "str" => "déjà\\n"
-  7 => b"é\\x00"
+  7 => b"""
+    é\\x00test\\t\\n
+    ing
+    """
   "[]" => []
   "res" => stream resource {@{$res}
 %A  wrapper_type: "plainfile"
diff --git a/src/Symfony/Component/VarDumper/Tests/Dumper/HtmlDumperTest.php b/src/Symfony/Component/VarDumper/Tests/Dumper/HtmlDumperTest.php
index b87bc2a007..af3db4b754 100644
--- a/src/Symfony/Component/VarDumper/Tests/Dumper/HtmlDumperTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Dumper/HtmlDumperTest.php
@@ -63,8 +63,11 @@ class HtmlDumperTest extends TestCase
   <span class=sf-dump-key>4</span> => <span class=sf-dump-num>INF</span>
   <span class=sf-dump-key>5</span> => <span class=sf-dump-num>-INF</span>
   <span class=sf-dump-key>6</span> => <span class=sf-dump-num>{$intMax}</span>
-  "<span class=sf-dump-key>str</span>" => "<span class=sf-dump-str title="5 characters">d&%s;j&%s;<span class=sf-dump-default>\\n</span></span>"
-  <span class=sf-dump-key>7</span> => b"<span class=sf-dump-str title="2 binary or non-UTF-8 characters">&%s;<span class=sf-dump-default>\\x00</span></span>"
+  "<span class=sf-dump-key>str</span>" => "<span class=sf-dump-str title="5 characters">d&%s;j&%s;<span class="sf-dump-default sf-dump-ns">\\n</span></span>"
+  <span class=sf-dump-key>7</span> => b"""
+    <span class=sf-dump-str title="11 binary or non-UTF-8 characters">&eacute;<span class="sf-dump-default">\\x00</span>test<span class="sf-dump-default">\\t</span><span class="sf-dump-default sf-dump-ns">\\n</span></span>
+    <span class=sf-dump-str title="11 binary or non-UTF-8 characters">ing</span>
+    """
   "<span class=sf-dump-key>[]</span>" => []
   "<span class=sf-dump-key>res</span>" => <span class=sf-dump-note>stream resource</span> <a class=sf-dump-ref>@{$res}</a><samp>
 %A  <span class=sf-dump-meta>wrapper_type</span>: "<span class=sf-dump-str title="9 characters">plainfile</span>"
diff --git a/src/Symfony/Component/VarDumper/Tests/Fixtures/dumb-var.php b/src/Symfony/Component/VarDumper/Tests/Fixtures/dumb-var.php
index 59ee19bdad..780f3b28d1 100644
--- a/src/Symfony/Component/VarDumper/Tests/Fixtures/dumb-var.php
+++ b/src/Symfony/Component/VarDumper/Tests/Fixtures/dumb-var.php
@@ -17,7 +17,7 @@ $g = fopen(__FILE__, 'r');
 $var = array(
     'number' => 1, null,
     'const' => 1.1, true, false, NAN, INF, -INF, PHP_INT_MAX,
-    'str' => "déjà\n", "\xE9\x00",
+    'str' => "déjà\n", "\xE9\x00test\t\ning",
     '[]' => array(),
     'res' => $g,
     'obj' => $foo,