diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -36,6 +36,8 @@
     'ArcanistChooseNoRevisionsException' => 'exception/ArcanistChooseNoRevisionsException.php',
     'ArcanistCloseRevisionWorkflow' => 'workflow/ArcanistCloseRevisionWorkflow.php',
     'ArcanistCloseWorkflow' => 'workflow/ArcanistCloseWorkflow.php',
+    'ArcanistClosureLinter' => 'lint/linter/ArcanistClosureLinter.php',
+    'ArcanistClosureLinterTestCase' => 'lint/linter/__tests__/ArcanistClosureLinterTestCase.php',
     'ArcanistCommentRemover' => 'parser/ArcanistCommentRemover.php',
     'ArcanistCommentRemoverTestCase' => 'parser/__tests__/ArcanistCommentRemoverTestCase.php',
     'ArcanistCommitWorkflow' => 'workflow/ArcanistCommitWorkflow.php',
@@ -222,6 +224,8 @@
     'ArcanistChooseNoRevisionsException' => 'Exception',
     'ArcanistCloseRevisionWorkflow' => 'ArcanistBaseWorkflow',
     'ArcanistCloseWorkflow' => 'ArcanistBaseWorkflow',
+    'ArcanistClosureLinter' => 'ArcanistExternalLinter',
+    'ArcanistClosureLinterTestCase' => 'ArcanistArcanistLinterTestCase',
     'ArcanistCommentRemoverTestCase' => 'ArcanistTestCase',
     'ArcanistCommitWorkflow' => 'ArcanistBaseWorkflow',
     'ArcanistConduitLinter' => 'ArcanistLinter',
diff --git a/src/lint/linter/ArcanistClosureLinter.php b/src/lint/linter/ArcanistClosureLinter.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/ArcanistClosureLinter.php
@@ -0,0 +1,82 @@
+<?php
+
+/**
+ * Uses gJSLint to detect errors and potential problems in JavaScript code.
+ */
+final class ArcanistClosureLinter extends ArcanistExternalLinter {
+
+  public function getInfoName() {
+    return 'Closure Linter';
+  }
+
+  public function getInfoURI() {
+    return 'https://developers.google.com/closure/utilities/';
+  }
+
+  public function getInfoDescription() {
+    return pht(
+      'Uses Google\'s Closure Linter to check Javascript code.');
+  }
+
+  public function getLinterName() {
+    return 'Closure Linter';
+  }
+
+  public function getLinterConfigurationName() {
+    return 'gjslint';
+  }
+
+  protected function getDefaultMessageSeverity($code) {
+    return ArcanistLintSeverity::SEVERITY_ERROR;
+  }
+
+  public function getDefaultBinary() {
+    return 'gjslint';
+  }
+
+  public function getInstallInstructions() {
+    return pht('Install gJSLint using `sudo easy_install http://closure-linter'.
+      '.googlecode.com/files/closure_linter-latest.tar.gz`');
+  }
+
+  public function shouldExpectCommandErrors() {
+    return true;
+  }
+
+  public function supportsReadDataFromStdin() {
+    return false;
+  }
+
+  protected function parseLinterOutput($path, $err, $stdout, $stderr) {
+    // Each line looks like this:
+    // Line 46, E:0110: Line too long (87 characters).
+    $regex = '/^Line (\d+), (E:\d+): (.*)/';
+    $severity_code = ArcanistLintSeverity::SEVERITY_ERROR;
+
+    $lines = explode("\n", $stdout);
+
+    $messages = array();
+    foreach ($lines as $line) {
+      $line = trim($line);
+      $matches = null;
+      if (!preg_match($regex, $line, $matches)) {
+        continue;
+      }
+      foreach ($matches as $key => $match) {
+        $matches[$key] = trim($match);
+      }
+
+      $message = new ArcanistLintMessage();
+      $message->setPath($path);
+      $message->setLine($matches[1]);
+      $message->setName($matches[2]);
+      $message->setCode($this->getLinterName());
+      $message->setDescription($matches[3]);
+      $message->setSeverity($severity_code);
+
+      $messages[] = $message;
+    }
+
+    return $messages;
+  }
+}
diff --git a/src/lint/linter/__tests__/ArcanistClosureLinterTestCase.php b/src/lint/linter/__tests__/ArcanistClosureLinterTestCase.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/__tests__/ArcanistClosureLinterTestCase.php
@@ -0,0 +1,15 @@
+<?php
+
+final class ArcanistClosureLinterTestCase
+  extends ArcanistArcanistLinterTestCase {
+
+  public function testClosureLinter() {
+    $linter = new ArcanistClosureLinter();
+    $linter->setFlags(array("--additional_extensions=lint-test"));
+
+    $this->executeTestsInDirectory(
+      dirname(__FILE__).'/gjslint/',
+      $linter);
+  }
+
+}
diff --git a/src/lint/linter/__tests__/gjslint/gjslint.lint-test b/src/lint/linter/__tests__/gjslint/gjslint.lint-test
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/__tests__/gjslint/gjslint.lint-test
@@ -0,0 +1,20 @@
+var x = 'some really really really really really really really long string';
+var y = 'some really really really really really really really really really long string',
+    z = 14;
+var obj = {name : 'vm'};
+var x
+var result = true
+             || false;
+/**
+ * @param x
+ * @return {string}
+ */
+function foo(x) {
+  return 'bar';
+}
+~~~~~~~~~~
+error:2:
+error:4:
+error:5:
+error:7:
+error:9:
\ No newline at end of file