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
@@ -153,6 +153,8 @@
     'PhutilDocblockParserTestCase' => 'parser/__tests__/PhutilDocblockParserTestCase.php',
     'PhutilEditDistanceMatrix' => 'utils/PhutilEditDistanceMatrix.php',
     'PhutilEditDistanceMatrixTestCase' => 'utils/__tests__/PhutilEditDistanceMatrixTestCase.php',
+    'PhutilEditorConfig' => 'parser/PhutilEditorConfig.php',
+    'PhutilEditorConfigTestCase' => 'parser/__tests__/PhutilEditorConfigTestCase.php',
     'PhutilEmailAddress' => 'parser/PhutilEmailAddress.php',
     'PhutilEmailAddressTestCase' => 'parser/__tests__/PhutilEmailAddressTestCase.php',
     'PhutilErrorHandler' => 'error/PhutilErrorHandler.php',
@@ -388,7 +390,9 @@
     'phutil_get_library_root' => 'moduleutils/moduleutils.php',
     'phutil_get_library_root_for_path' => 'moduleutils/moduleutils.php',
     'phutil_get_signal_name' => 'future/exec/execx.php',
+    'phutil_glob_to_regex' => 'utils/utils.php',
     'phutil_implode_html' => 'markup/render.php',
+    'phutil_ini_decode' => 'utils/utils.php',
     'phutil_is_hiphop_runtime' => 'utils/utils.php',
     'phutil_is_utf8' => 'utils/utf8.php',
     'phutil_is_utf8_slowly' => 'utils/utf8.php',
@@ -565,6 +569,7 @@
     'PhutilDirectedScalarGraph' => 'AbstractDirectedGraph',
     'PhutilDocblockParserTestCase' => 'PhutilTestCase',
     'PhutilEditDistanceMatrixTestCase' => 'PhutilTestCase',
+    'PhutilEditorConfigTestCase' => 'PhutilTestCase',
     'PhutilEmailAddressTestCase' => 'PhutilTestCase',
     'PhutilErrorHandlerTestCase' => 'PhutilTestCase',
     'PhutilErrorTrap' => 'Phobject',
diff --git a/src/parser/PhutilEditorConfig.php b/src/parser/PhutilEditorConfig.php
new file mode 100644
--- /dev/null
+++ b/src/parser/PhutilEditorConfig.php
@@ -0,0 +1,89 @@
+<?php
+
+/**
+ * Utilities for parsing [[http://editorconfig.org/ | EditorConfig]] files.
+ */
+final class PhutilEditorConfig {
+
+  private $configs;
+  private $rootPath;
+
+  /**
+   * Constructor.
+   *
+   * @param string  The root directory.
+   */
+  public function __construct($root) {
+    $this->rootPath = $root;
+
+    $paths = id(new FileFinder($root))
+      ->withType('f')
+      ->withName('.editorconfig')
+      ->find();
+
+    foreach ($paths as $path) {
+      $this->addEditorConfigFile(Filesystem::resolvePath($path, $root));
+    }
+  }
+
+  protected function addEditorConfigFile($path) {
+    $file = Filesystem::readFile($path);
+    $config = phutil_ini_decode($file);
+
+    unset($config['root']);
+    $this->validateEditorConfig($config);
+
+    $path = dirname($path);
+    $this->configs[$path] = array();
+
+    foreach ($config as $key => $value) {
+      if (preg_match('@/@', $key)) {
+        $this->configs[$path][phutil_glob_to_regex('**/'.$key)] = $value;
+      } else if (preg_match('@^/@', $key)) {
+        $this->configs[$path][phutil_glob_to_regex(substr($key, 1))] = $value;
+      } else {
+        $this->configs[$path][phutil_glob_to_regex($key)] = $value;
+      }
+    }
+  }
+
+  public static function validateEditorConfig(array $config) {
+    $spec = PhutilTypeSpec::newFromString('map<string, map<string, string>>');
+    $spec->check($config);
+  }
+
+  /**
+   * Return the paths of all EditorConfig files that were found.
+   *
+   * @return list<string>
+   */
+  public function getPaths() {
+    $paths = array();
+
+    foreach (array_keys($this->configs) as $path) {
+      $paths[] = $path.'/.editorconfig';
+    }
+
+    return $paths;
+  }
+
+  /**
+   * Return the root path.
+   *
+   * @return string
+   */
+  public function getRootPath() {
+    return $this->rootPath;
+  }
+
+  public function getConfig($path, $key) {
+    foreach ($this->configs as $config_path => $config) {
+      if (Filesystem::isDescendant($path, $config_path)) {
+        foreach ($config as $config_key => $config_value) {
+
+        }
+      }
+    }
+  }
+
+}
diff --git a/src/parser/__tests__/PhutilEditorConfigTestCase.php b/src/parser/__tests__/PhutilEditorConfigTestCase.php
new file mode 100644
--- /dev/null
+++ b/src/parser/__tests__/PhutilEditorConfigTestCase.php
@@ -0,0 +1,50 @@
+<?php
+
+/**
+ * @group testcase
+ */
+final class PhutilEditorConfigTestCase extends PhutilTestCase {
+
+  public function testGetPaths() {
+    $tests = array(
+      dirname(__FILE__) => array(
+        dirname(__FILE__).'/editorconfig/.editorconfig',
+        dirname(__FILE__).'/editorconfig/subdir1/.editorconfig',
+        dirname(__FILE__).'/editorconfig/subdir2/.editorconfig',
+      ),
+      dirname(__FILE__).'/editorconfig/subdir1' => array(
+        dirname(__FILE__).'/editorconfig/subdir1/.editorconfig',
+      ),
+      dirname(__FILE__).'/editorconfig/subdir2' => array(
+        dirname(__FILE__).'/editorconfig/subdir2/.editorconfig',
+      ),
+      dirname(__FILE__).'/../../../' => array(
+        Filesystem::resolvePath('.editorconfig', dirname(__FILE__).'/../../..'),
+        dirname(__FILE__).'/editorconfig/.editorconfig',
+        dirname(__FILE__).'/editorconfig/subdir1/.editorconfig',
+        dirname(__FILE__).'/editorconfig/subdir2/.editorconfig',
+      ),
+    );
+
+    foreach ($tests as $input => $expect) {
+      $editorconfig = new PhutilEditorConfig($input);
+      $this->assertEqual($expect, $editorconfig->getPaths());
+    }
+  }
+
+  public function testGetRootPath() {
+    $tests = array(
+      dirname(__FILE__) => dirname(__FILE__),
+      dirname(__FILE__).'/editorconfig/subdir1'
+        => dirname(__FILE__).'/editorconfig/subdir1',
+      dirname(__FILE__).'/editorconfig/subdir2'
+        => dirname(__FILE__).'/editorconfig/subdir2',
+    );
+
+    foreach ($tests as $input => $expect) {
+      $editorconfig = new PhutilEditorConfig($input);
+      $this->assertEqual($expect, $editorconfig->getRootPath());
+    }
+  }
+
+}
diff --git a/src/parser/__tests__/editorconfig/.editorconfig b/src/parser/__tests__/editorconfig/.editorconfig
new file mode 100644
diff --git a/src/parser/__tests__/editorconfig/subdir1/.editorconfig b/src/parser/__tests__/editorconfig/subdir1/.editorconfig
new file mode 100644
diff --git a/src/parser/__tests__/editorconfig/subdir2/.editorconfig b/src/parser/__tests__/editorconfig/subdir2/.editorconfig
new file mode 100644
--- /dev/null
+++ b/src/parser/__tests__/editorconfig/subdir2/.editorconfig
@@ -0,0 +1 @@
+root = true
diff --git a/src/utils/__tests__/PhutilUtilsTestCase.php b/src/utils/__tests__/PhutilUtilsTestCase.php
--- a/src/utils/__tests__/PhutilUtilsTestCase.php
+++ b/src/utils/__tests__/PhutilUtilsTestCase.php
@@ -544,6 +544,35 @@
     }
   }
 
+  public function testPhutilINIDecode() {
+    $valid_cases = array(
+      '' => array(),
+      "[foo]\nbar = baz\n" => array('foo' => array('bar' => 'baz')),
+      "; Comment\n[foo]\nbar = baz\n" => array('foo' => array('bar' => 'baz')),
+      "# Comment\n[foo]\nbar = baz\n" => array('foo' => array('bar' => 'baz')),
+    );
+
+    foreach ($valid_cases as $input => $expect) {
+      $result = phutil_ini_decode($input);
+      $this->assertEqual($expect, $result, 'phutil_ini_decode('.$input.')');
+    }
+
+    $invalid_cases = array(
+      '[',
+      "[\nfoo\n]\nbar = baz\n",
+    );
+
+    foreach ($invalid_cases as $input) {
+      $caught = null;
+      try {
+        phutil_ini_decode($input);
+      } catch (Exception $ex) {
+        $caught = $ex;
+      }
+      $this->assertTrue($caught instanceof Exception);
+    }
+  }
+
   public function testCensorCredentials() {
     $cases = array(
       '' => '',
@@ -574,5 +603,72 @@
     }
   }
 
+  public function testGlobToRegex() {
+    $cases = array(
+      '' => array(
+        array(''),
+        array('f', '/'),
+      ),
+      '*' => array(
+        array('foo'),
+        array('foo/', '/foo'),
+      ),
+      '**' => array(
+        array('foo', 'foo/', '/foo', 'foo/bar/baz'),
+        array(),
+      ),
+      'foo.*' => array(
+        array('foo.php', 'foo.a', 'foo.'),
+        array('fooo.php', 'foo.php/foo'),
+      ),
+      'fo?' => array(
+        array('foo', 'fot'),
+        array('fooo', 'ffoo', 'fo/'),
+      ),
+      'fo{o,t}' => array(
+        array('foo', 'fot'),
+        array('fob', 'fo/'),
+      ),
+      'foo(bar|foo)' => array(
+        array('foo(bar|foo)'),
+        array('foobar', 'foofoo'),
+      ),
+      'foo,bar' => array(
+        array('foo,bar'),
+        array('foo', 'bar'),
+      ),
+      'fo{o,\\,}' => array(
+        array('foo', 'fo,'),
+        array(),
+      ),
+      'fo{o,\\\\}' => array(
+        array('foo', 'fo\\'),
+        array(),
+      ),
+      '/foo' => array(
+        array('/foo'),
+        array('foo'),
+      ),
+    );
+
+    foreach ($cases as $input => $expect) {
+      list($matches, $no_matches) = $expect;
+
+      $regex = phutil_glob_to_regex($input);
+      PhutilTypeSpec::newFromString('regex')->check($regex);
+
+      foreach ($matches as $match) {
+        $this->assertTrue(
+          (bool)preg_match($regex, $match),
+          pht('Expecting "%s" to match "%s".', $regex, $match));
+      }
+
+      foreach ($no_matches as $no_match) {
+        $this->assertFalse(
+          (bool)preg_match($regex, $no_match),
+          pht('Expecting "%s" not to match "%s".', $regex, $no_match));
+      }
+    }
+  }
 
 }
diff --git a/src/utils/utils.php b/src/utils/utils.php
--- a/src/utils/utils.php
+++ b/src/utils/utils.php
@@ -1065,6 +1065,30 @@
   return $result;
 }
 
+/**
+ * Decode an INI string.
+ *
+ * @param  string
+ * @return mixed
+ */
+function phutil_ini_decode($string) {
+  if (function_exists('parse_ini_string')) {
+    $result = @parse_ini_string($string, true);
+  } else {
+    $tmp = new TempFile('ini');
+    Filesystem::writeFile($tmp, $string);
+    $full_path = (string)$tmp;
+
+    $result = @parse_ini_file($full_path, true);
+  }
+
+  if ($result === false) {
+    throw new Exception('Invalid INI.');
+  }
+
+  return $result;
+}
+
 
 /**
  * Attempt to censor any plaintext credentials from a string.
@@ -1080,3 +1104,65 @@
 function phutil_censor_credentials($string) {
   return preg_replace(',(?<=://)([^/@\s]+)(?=@|$),', 'xxxxx', $string);
 }
+
+/**
+ * Returns a regular expression which is equivalent to the given glob pattern.
+ *
+ * This function was adapted from
+ * https://github.com/symfony/Finder/blob/master/Glob.php.
+ *
+ * @param  string  A glob pattern.
+ * @return regex
+ */
+function phutil_glob_to_regex($glob) {
+  $escaping = false;
+  $in_curlies = 0;
+  $regex = '';
+
+  for ($i = 0; $i < strlen($glob); $i++) {
+    $char = $glob[$i];
+    $next_char = ($i < strlen($glob) - 1) ? $glob[$i + 1] : null;
+
+    if (in_array($char, array('.', '(', ')', '|', '+', '^', '$'))) {
+      $regex .= "\\$char";
+    } else if ($char === '*') {
+      if ($escaping) {
+        $regex .= '\\*';
+      } else {
+        if ($next_char === '*') {
+          $regex .= '.*';
+        } else {
+          $regex .= '[^/]*';
+        }
+      }
+    } else if ($char === '?') {
+      $regex .= $escaping ? '\\?' : '[^/]';
+    } else if ($char === '{') {
+      $regex .= $escaping ? '\\{' : '(';
+      if (!$escaping) {
+        ++$in_curlies;
+      }
+    } else if ($char === '}' && $in_curlies) {
+      $regex .= $escaping ? '}' : ')';
+      if (!$escaping) {
+        --$in_curlies;
+      }
+    } else if ($char === ',' && $in_curlies) {
+      $regex .= $escaping ? ',' : '|';
+    } else if ($char === '\\') {
+      if ($escaping) {
+        $regex .= '\\\\';
+        $escaping = false;
+      } else {
+        $escaping = true;
+      }
+
+      continue;
+    } else {
+      $regex .= $char;
+    }
+    $escaping = false;
+  }
+
+  return '#^'.$regex.'$#';
+}