diff --git a/CHANGELOG-v3.md b/CHANGELOG-v3.md
index 6f41f0ae7ea..57aef1d4d55 100644
--- a/CHANGELOG-v3.md
+++ b/CHANGELOG-v3.md
@@ -2,6 +2,9 @@
 
 ## Unreleased
 
+### Added
+- Added the `|json_decode` Twig filter.  ([#3678](https://github.com/craftcms/cms/pull/3678))
+
 ### Fixed
 - Fixed an error that occurred when updating to Craft 3.1 if a plugin or module was calling any soft-deletable records’ `find()` methods.
 - Fixed an error that occurred when updating from Craft 2 to Craft 3.1 if there were any RichText fields. ([#3677](https://github.com/craftcms/cms/issues/3677))
diff --git a/docs/dev/filters.md b/docs/dev/filters.md
index db362d954df..55d306ca747 100644
--- a/docs/dev/filters.md
+++ b/docs/dev/filters.md
@@ -247,6 +247,14 @@ Returns an array containing only the values that are also in a passed-in array.
 
 Like Twig’s core [json_encode](https://twig.symfony.com/doc/2.x/filters/json_encode.html) filter, but if the `options` argument isn’t set, it will default to `JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_QUOT` if the response content type is either `text/html` or `application/xhtml+xml`.
 
+## `json_decode`
+
+JSON-decodes a string into an array  by passing it through <api:yii\helpers\Json::decode()>.
+
+```twig
+{% set arr = '[1, 2, 3]'|json_decode %}
+```
+
 ## `kebab`
 
 Returns a string formatted in “kebab-case”.
diff --git a/src/web/twig/Extension.php b/src/web/twig/Extension.php
index 68647fd077e..ba5a134b8d5 100644
--- a/src/web/twig/Extension.php
+++ b/src/web/twig/Extension.php
@@ -16,6 +16,7 @@
 use craft\helpers\DateTimeHelper;
 use craft\helpers\Db;
 use craft\helpers\FileHelper;
+use craft\helpers\Json;
 use craft\helpers\Sequence;
 use craft\helpers\StringHelper;
 use craft\helpers\Template as TemplateHelper;
@@ -213,6 +214,7 @@ public function getFilters(): array
             new \Twig_SimpleFilter('indexOf', [$this, 'indexOfFilter']),
             new \Twig_SimpleFilter('intersect', 'array_intersect'),
             new \Twig_SimpleFilter('json_encode', [$this, 'jsonEncodeFilter']),
+            new \Twig_SimpleFilter('json_decode', [Json::class, 'json_decode']),
             new \Twig_SimpleFilter('kebab', [$this, 'kebabFilter']),
             new \Twig_SimpleFilter('lcfirst', [$this, 'lcfirstFilter']),
             new \Twig_SimpleFilter('literal', [$this, 'literalFilter']),