diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index bf2d841413d..5f520732307 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -12,6 +12,8 @@ Yii Framework 2 Change Log
 - Bug #20453: Fix PHPStan/Psalm types in `yii\web\View` (max-s-lab)
 - Enh #20461: Add PHPStan/Psalm annotations for `yii\filters\auth\AuthInterface` (max-s-lab)
 - Bug #20459: Fix return type in `RequestParserInterface::parse` (max-s-lab)
+- Enh #20477: Added Content-Encoding(aka gzip) support to request body (lucaswitch)
+
 - Bug #20475: Fix `Formatter` class `asScientific()` method for PHP `8.5` `sprintf` precision change (`6` to `0`) (terabytesoftw)
 
 2.0.53 June 27, 2025
diff --git a/framework/web/Request.php b/framework/web/Request.php
index 7b9645d532d..c228c5f851b 100644
--- a/framework/web/Request.php
+++ b/framework/web/Request.php
@@ -307,6 +307,8 @@ class Request extends \yii\base\Request
      * @var HeaderCollection Collection of request headers.
      */
     private $_headers;
+    /** @var boolean Enable automatically inflate post requests with gzip/deflate Content-Encoding headers */
+    public $gzip = false;
 
 
     /**
@@ -562,6 +564,24 @@ public function getIsFlash()
 
     private $_rawBody;
 
+    /**
+     * Inflate the raw body on needed.
+     * @return void
+     */
+    private function tryInflateRawBody()
+    {
+        if ($this->gzip) {
+            $contentEncoding = $this->headers->get('Content-Encoding', '', true);
+            if ($contentEncoding === 'gzip' || $contentEncoding === 'x-gzip') {
+                // 	gzip (RFC 1952)
+                $this->_rawBody = gzdecode($this->_rawBody);
+            } elseif ($contentEncoding === 'deflate') {
+                // raw deflate (RFC 1951)
+                $this->_rawBody = gzinflate($this->_rawBody);
+            }
+        }
+    }
+
     /**
      * Returns the raw HTTP request body.
      * @return string the request body
@@ -570,8 +590,8 @@ public function getRawBody()
     {
         if ($this->_rawBody === null) {
             $this->_rawBody = file_get_contents('php://input');
+            $this->tryInflateRawBody();
         }
-
         return $this->_rawBody;
     }
 
diff --git a/tests/framework/web/RequestTest.php b/tests/framework/web/RequestTest.php
index 932392e187d..0ab27a02376 100644
--- a/tests/framework/web/RequestTest.php
+++ b/tests/framework/web/RequestTest.php
@@ -7,6 +7,7 @@
 
 namespace yiiunit\framework\web;
 
+use ReflectionClass;
 use yii\web\Request;
 use yiiunit\TestCase;
 
@@ -564,7 +565,7 @@ public function testGetScriptUrlWithEmptyServer()
         $_SERVER = [];
 
         $this->expectException(\yii\base\InvalidConfigException::class);
-        
+
         $request->getScriptUrl();
     }
 
@@ -1410,4 +1411,45 @@ public function testForwardedNotTrusted()
         $this->assertSame('10.0.0.1', $request->userIP, 'User IP fail!');
         $this->assertSame('http://yiiframework.com', $request->hostInfo, 'Host info fail!');
     }
+
+    public function testGzipGetRawBody()
+    {
+        $request = new Request(['gzip' => true]);
+        $reflection = new ReflectionClass($request);
+        $tryInflateRawBody = $reflection->getMethod('tryInflateRawBody');
+        $rawBody = $reflection->getProperty('_rawBody');
+        $rawBody->setAccessible(true);
+        $tryInflateRawBody->setAccessible(true);
+
+        $testString = 'hello!';
+        // Test gzip as described in RFC 1950, Content-Encoding: gzip or x-gzip
+        $request->headers->add('Content-encoding','gzip');
+        $rawBody->setValue($request, gzencode($testString));
+        $tryInflateRawBody->invoke($request);
+        $this->assertSame($testString, $rawBody->getValue($request), 'Could not deflate correctly');
+        $request->headers->add('Content-encoding','x-gzip');
+        $rawBody->setValue($request, gzencode($testString));
+        $tryInflateRawBody->invoke($request);
+        $this->assertSame($testString, $rawBody->getValue($request), 'Could not deflate correctly');
+
+        // Test deflate as described in RFC 1951, Content-Encoding: deflate
+        $request = new Request(['gzip' => true]);
+        $request->headers->add('Content-encoding','deflate');
+        $rawBody->setValue($request, gzdeflate($testString));
+        $tryInflateRawBody->invoke($request);
+        $this->assertSame($testString, $rawBody->getValue($request), 'Could not deflate correctly');
+
+        // Test backwards compatibility
+        $request = new Request(['gzip' => false]);
+        $request->headers->add('Content-encoding','deflate');
+        $rawBody->setValue($request, gzdeflate($testString));
+        $tryInflateRawBody->invoke($request);
+        $this->assertSame(gzdeflate($testString), $rawBody->getValue($request), 'Gzip flag not working as expected');
+
+        $request = new Request();
+        $request->headers->add('Content-encoding','deflate');
+        $rawBody->setValue($request, gzdeflate($testString));
+        $tryInflateRawBody->invoke($request);
+        $this->assertSame(gzdeflate($testString), $rawBody->getValue($request), 'Gzip flag not working as expected');
+    }
 }