diff --git includes/processor.inc includes/processor.inc
index e1745e5..ed7b2ff 100644
--- includes/processor.inc
+++ includes/processor.inc
@@ -136,12 +136,38 @@ abstract class SearchApiAbstractProcessor implements SearchApiProcessorInterface
   }
 
   public function configurationForm() {
-    return array();
+    $form['#attached']['css'][] = drupal_get_path('module', 'search_api') . '/search_api.admin.css';
+
+    $fields = empty($this->index->options['fields']) ? _search_api_admin_get_fields($this->index, $this->index->entityWrapper()) : $this->index->options;
+    $fields = $fields['fields'];
+    $field_options = array();
+    $default_fields = isset($this->options['fields']) ? $this->options['fields'] : array();
+    foreach ($fields as $name => $field) {
+      if ($field['indexed']) {
+        $field_options[$name] = $field['name'];
+        if (!isset($this->options['fields']) && $this->testField($name, $field)) {
+          $default_fields[$name] = $name;
+        }
+      }
+    }
+
+    $form['fields'] = array(
+      '#type' => 'checkboxes',
+      '#title' => t('Fields to run on'),
+      '#options' => $field_options,
+      '#default_value' => $default_fields,
+      '#attributes' => array('class' => array('search-api-processor-fields')),
+    );
+
+    return $form;
   }
 
   public function configurationFormValidate(array $form, array &$values, array &$form_state) { }
 
   public function configurationFormSubmit(array $form, array &$values, array &$form_state) {
+    if (isset($values['fields'])) {
+      $values['fields'] = array_filter($values['fields']);
+    }
     $this->options = $values;
     return $values;
   }
@@ -298,7 +324,10 @@ abstract class SearchApiAbstractProcessor implements SearchApiProcessorInterface
    *   TRUE, iff the field should be processed.
    */
   protected function testField($name, array $field) {
-    return $this->testType($field['type']);
+    if (empty($this->options['fields'])) {
+      return $this->testType($field['type']);
+    }
+    return !empty($this->options['fields'][$name]);
   }
 
   /**
diff --git includes/processor_html_filter.inc includes/processor_html_filter.inc
index 9974ace..205723a 100644
--- includes/processor_html_filter.inc
+++ includes/processor_html_filter.inc
@@ -31,7 +31,8 @@ class SearchApiHtmlFilter extends SearchApiAbstractProcessor {
   }
 
   public function configurationForm() {
-    $form = array(
+    $form = parent::configurationForm();
+    $form += array(
       'title' => array(
         '#type' => 'checkbox',
         '#title' => t('Index title attribute'),
diff --git includes/processor_ignore_case.inc includes/processor_ignore_case.inc
index 1f046cf..fd5d7e9 100644
--- includes/processor_ignore_case.inc
+++ includes/processor_ignore_case.inc
@@ -5,30 +5,6 @@
  */
 class SearchApiIgnoreCase extends SearchApiAbstractProcessor {
 
-  public function configurationForm() {
-    $form = array(
-      'strings' => array(
-        '#type' => 'checkbox',
-        '#title' => t('Process strings'),
-        '#description' => t('Determines whether this processor will process string fields, too.'),
-      ),
-    );
-
-    if (!empty($this->options)) {
-      $form['strings']['#default_value']   = $this->options['strings'];
-    }
-
-    return $form;
-  }
-
-  public function testType($type) {
-    $allowed = array('text', 'tokens');
-    if (!empty($this->options['strings'])) {
-      $allowed[] = 'string';
-    }
-    return search_api_is_text_type($type, $allowed);;
-  }
-
   protected function process(&$value) {
     $value = drupal_strtolower($value);
   }
diff --git includes/processor_tokenizer.inc includes/processor_tokenizer.inc
index bd445d6..f635ed1 100644
--- includes/processor_tokenizer.inc
+++ includes/processor_tokenizer.inc
@@ -17,7 +17,8 @@ class SearchApiTokenizer extends SearchApiAbstractProcessor {
   protected $ignorable;
 
   public function configurationForm() {
-    $form = array(
+    $form = parent::configurationForm();
+    $form += array(
       'spaces' => array(
         '#type' => 'textfield',
         '#title' => t('Whitespace characters'),
diff --git search_api.admin.css search_api.admin.css
index 63eb0ea..2141cd0 100644
--- search_api.admin.css
+++ search_api.admin.css
@@ -34,7 +34,8 @@ input.search-api-cron-limit {
   text-align: right;
 }
 
-.search-api-alter-add-aggregation-fields {
+.search-api-alter-add-aggregation-fields,
+.search-api-processor-fields {
   max-height: 12em;
   overflow: auto;
 }
diff --git search_api.install search_api.install
index 3b180ca..a1d5908 100644
--- search_api.install
+++ search_api.install
@@ -678,3 +678,44 @@ function search_api_update_7106() {
     }
   }
 }
+
+/**
+ * Initialize the "Fields to run on" settings for processors.
+ */
+function search_api_update_7107() {
+  $rows = db_select('search_api_index', 'i')
+    ->fields('i', array('id', 'options'))
+    ->execute()
+    ->fetchAllKeyed();
+  foreach ($rows as $id => $options) {
+    $opt = unserialize($options);
+    $processors = &$opt['processors'];
+    // Only update our own processors, don't mess with others.
+    $check_processors = array(
+      'search_api_case_ignore' => 1,
+      'search_api_html_filter' => 1,
+      'search_api_tokenizer' => 1,
+    );
+    foreach (array_intersect_key($processors, $check_processors) as $name => $info) {
+      $types = array('text');
+      if (!empty($info['settings']['strings'])) {
+        $types[] = 'string';
+        unset($processors[$name]['settings']['strings']);
+      }
+      foreach ($opt['fields'] as $field => $info) {
+        if ($info['indexed'] && search_api_is_text_type($info['type'], $types)) {
+          $processors[$name]['settings']['fields'][$field] = $field;
+        }
+      }
+    }
+    $opt = serialize($opt);
+    if ($opt != $options) {
+      db_update('search_api_index')
+        ->fields(array(
+          'options' => $opt,
+        ))
+        ->condition('id', $id)
+        ->execute();
+    }
+  }
+}
diff --git search_api.test search_api.test
index 88d4fa8..3ba65a1 100644
--- search_api.test
+++ search_api.test
@@ -184,11 +184,18 @@ class SearchApiWebTest extends DrupalWebTestCase {
       'callbacks[search_api_alter_add_aggregation][weight]' => 10,
       'processors[search_api_case_ignore][status]' => 1,
       'processors[search_api_case_ignore][weight]' => 0,
-      'processors[search_api_case_ignore][settings][strings]' => 0,
+      'processors[search_api_case_ignore][settings][fields][title]' => 1,
+      'processors[search_api_case_ignore][settings][fields][body]' => 1,
+      'processors[search_api_case_ignore][settings][fields][parent:title]' => 1,
+      'processors[search_api_case_ignore][settings][fields][parent:body]' => 1,
       'processors[search_api_tokenizer][status]' => 1,
       'processors[search_api_tokenizer][weight]' => 20,
       'processors[search_api_tokenizer][settings][spaces]' => '[^\p{L}\p{N}]',
       'processors[search_api_tokenizer][settings][ignorable]' => '[-]',
+      'processors[search_api_tokenizer][settings][fields][title]' => 1,
+      'processors[search_api_tokenizer][settings][fields][body]' => 1,
+      'processors[search_api_tokenizer][settings][fields][parent:title]' => 1,
+      'processors[search_api_tokenizer][settings][fields][parent:body]' => 1,
     );
     $this->drupalPost(NULL, $values, t('Add new field'));
     $values = array(
@@ -473,7 +480,7 @@ class SearchApiUnitTest extends DrupalWebTestCase {
   public function checkIgnoreCaseProcessor() {
     $types = search_api_field_types();
     $orig = 'Foo bar BaZ, ÄÖÜÀÁ<>»«.';
-    $processed = 'foo bar baz, äöüàá<>»«.';
+    $processed = drupal_strtolower($orig);
     $items = array(
       1 => array(
         'name' => array(
@@ -508,11 +515,11 @@ class SearchApiUnitTest extends DrupalWebTestCase {
       array('mail', 'bar', '='),
     );
 
-    $processor = new SearchApiIgnoreCase($this->index, array('strings' => FALSE));
+    $processor = new SearchApiIgnoreCase($this->index, array('fields' => array('name' => 'name')));
     $tmp = $items;
     $processor->preprocessIndexItems($tmp);
-    $this->assertEqual($tmp[1]['name']['value'], $processed, t('!type field was processed.', array('!type' => $types['text'])));
-    $this->assertEqual($tmp[1]['mail']['value'], $orig, t("!type field wasn't processed.", array('!type' => $types['string'])));
+    $this->assertEqual($tmp[1]['name']['value'], $processed, t('!type field was processed.', array('!type' => 'name')));
+    $this->assertEqual($tmp[1]['mail']['value'], $orig, t("!type field wasn't processed.", array('!type' => 'mail')));
 
     $query = new SearchApiQuery($this->index);
     $query->keys('Foo "baR BaZ" fOObAr1');
@@ -522,11 +529,11 @@ class SearchApiUnitTest extends DrupalWebTestCase {
     $this->assertEqual($query->getKeys(), $keys1, t('Search keys were processed correctly.'));
     $this->assertEqual($query->getFilter()->getFilters(), $filters1, t('Filters were processed correctly.'));
 
-    $processor = new SearchApiIgnoreCase($this->index, array('strings' => TRUE));
+    $processor = new SearchApiIgnoreCase($this->index, array('fields' => array('name' => 'name', 'mail' => 'mail')));
     $tmp = $items;
     $processor->preprocessIndexItems($tmp);
-    $this->assertEqual($tmp[1]['name']['value'], $processed, t('!type field was processed.', array('!type' => $types['text'])));
-    $this->assertEqual($tmp[1]['mail']['value'], $processed, t('!type field was processed.', array('!type' => $types['string'])));
+    $this->assertEqual($tmp[1]['name']['value'], $processed, t('!type field was processed.', array('!type' => 'name')));
+    $this->assertEqual($tmp[1]['mail']['value'], $processed, t('!type field was processed.', array('!type' => 'mail')));
 
     $query = new SearchApiQuery($this->index);
     $query->keys('Foo "baR BaZ" fOObAr1');
@@ -598,7 +605,7 @@ class SearchApiUnitTest extends DrupalWebTestCase {
       ),
     );
 
-    $processor = new SearchApiTokenizer($this->index, array('spaces' => '[^\p{L}\p{N}]', 'ignorable' => '[-]'));
+    $processor = new SearchApiTokenizer($this->index, array('fields' => array('name' => 'name'), 'spaces' => '[^\p{L}\p{N}]', 'ignorable' => '[-]'));
     $tmp = $items;
     $processor->preprocessIndexItems($tmp);
     $this->assertEqual($tmp[1]['name']['value'], $processed1, t('Value was correctly tokenized with default settings.'));
@@ -608,7 +615,7 @@ class SearchApiUnitTest extends DrupalWebTestCase {
     $processor->preprocessSearchQuery($query);
     $this->assertEqual($query->getKeys(), 'foo barbaz foobar1', t('Search keys were processed correctly.'));
 
-    $processor = new SearchApiTokenizer($this->index, array('spaces' => '[-a]', 'ignorable' => '\s'));
+    $processor = new SearchApiTokenizer($this->index, array('fields' => array('name' => 'name'), 'spaces' => '[-a]', 'ignorable' => '\s'));
     $tmp = $items;
     $processor->preprocessIndexItems($tmp);
     $this->assertEqual($tmp[1]['name']['value'], $processed2, t('Value was correctly tokenized with custom settings.'));
@@ -677,9 +684,9 @@ END;
     );
 
     $tmp = $items;
-    $processor = new SearchApiHtmlFilter($this->index, array('title' => TRUE, 'alt' => TRUE, 'tags' => $tags));
+    $processor = new SearchApiHtmlFilter($this->index, array('fields' => array('name' => 'name'), 'title' => TRUE, 'alt' => TRUE, 'tags' => $tags));
     $processor->preprocessIndexItems($tmp);
-    $processor = new SearchApiTokenizer($this->index, array('spaces' => '[\s.:]', 'ignorable' => ''));
+    $processor = new SearchApiTokenizer($this->index, array('fields' => array('name' => 'name'), 'spaces' => '[\s.:]', 'ignorable' => ''));
     $processor->preprocessIndexItems($tmp);
     $this->assertEqual($tmp[1]['name']['value'], $processed1, t('Text was correctly processed.'));
   }