diff --git a/.gitignore b/.gitignore
index 0352a0c..7b1d51e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,5 @@
 /coverage.xml
 /.phpcs-cache
 /.phpunit.result.cache
-/composer.lock
\ No newline at end of file
+/composer.lock
+/.phpunit.cache/
diff --git a/README.md b/README.md
index f955d0c..b84f846 100644
--- a/README.md
+++ b/README.md
@@ -567,9 +567,9 @@ $request = Gotenberg::chromium($apiUrl)
     ->url('https://my.url');
 ```
 
-#### Extra HTTP headers
+#### User Agent
 
-You may add HTTP headers that Chromium will send when loading the HTML document:
+You may overridethe default *User-Agent* HTTP header with:
 
 ```php
 use Gotenberg\Gotenberg;
@@ -583,6 +583,19 @@ $request = Gotenberg::chromium($apiUrl)
     ->url('https://my.url');
 ```
 
+#### Extra HTTP headers
+
+You may add HTTP headers that Chromium will send when loading the HTML document:
+
+```php
+use Gotenberg\Gotenberg;
+
+$request = Gotenberg::chromium($apiUrl)
+    ->pdf()
+    ->userAgent('Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko)')
+    ->url('https://my.url');
+```
+
 #### Invalid HTTP status codes
 
 You may force Gotenberg to return a `409 Conflict` response if the HTTP status code from the main page is not acceptable:
@@ -659,7 +672,7 @@ $request = Gotenberg::chromium($apiUrl)
 
 #### Screenshots
 
-You can capture full-page screenshots using the following three routes, which function similarly to their PDF equivalents:
+You can capture screenshots using the following three routes, which function similarly to their PDF equivalents:
 
 ```php
 use Gotenberg\Gotenberg;
diff --git a/src/Modules/ChromiumMultipartFormDataModule.php b/src/Modules/ChromiumMultipartFormDataModule.php
index b66435f..6aa6872 100644
--- a/src/Modules/ChromiumMultipartFormDataModule.php
+++ b/src/Modules/ChromiumMultipartFormDataModule.php
@@ -88,6 +88,16 @@ public function cookies(array $cookies): self
         return $this;
     }
 
+    /**
+     * Overrides the default 'User-Agent' HTTP header.
+     */
+    public function userAgent(string $userAgent): self
+    {
+        $this->formValue('userAgent', $userAgent);
+
+        return $this;
+    }
+
     /**
      * Sets extra HTTP headers that Chromium will send when loading the HTML
      * document.
diff --git a/tests/Modules/ChromiumPdfTest.php b/tests/Modules/ChromiumPdfTest.php
index 917dd71..6f380ae 100644
--- a/tests/Modules/ChromiumPdfTest.php
+++ b/tests/Modules/ChromiumPdfTest.php
@@ -38,6 +38,7 @@ function (
         string|null $waitForExpression = null,
         string|null $emulatedMediaType = null,
         array $cookies = [],
+        string|null $userAgent = null,
         array $extraHttpHeaders = [],
         array $failOnHttpStatusCodes = [],
         bool $failOnConsoleExceptions = false,
@@ -69,6 +70,7 @@ function (
             $waitForExpression,
             $emulatedMediaType,
             $cookies,
+            $userAgent,
             $extraHttpHeaders,
             $failOnHttpStatusCodes,
             $failOnConsoleExceptions,
@@ -106,6 +108,7 @@ function (
             $waitForExpression,
             $emulatedMediaType,
             $cookies,
+            $userAgent,
             $extraHttpHeaders,
             $failOnHttpStatusCodes,
             $failOnConsoleExceptions,
@@ -143,6 +146,7 @@ function (
             new ChromiumCookie('yummy_cookie', 'choco', 'theyummycookie.com'),
             new ChromiumCookie('vanilla_cookie', 'vanilla', 'theyummycookie.com', '/', true, true, 'Lax'),
         ],
+        'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko)',
         [
             'My-Http-Header' => 'HTTP Header content',
             'My-Second-Http-Header' => 'Second HTTP Header content',
@@ -189,6 +193,7 @@ function (
         string|null $waitForExpression = null,
         string|null $emulatedMediaType = null,
         array $cookies = [],
+        string|null $userAgent = null,
         array $extraHttpHeaders = [],
         array $failOnHttpStatusCodes = [],
         bool $failOnConsoleExceptions = false,
@@ -220,6 +225,7 @@ function (
             $waitForExpression,
             $emulatedMediaType,
             $cookies,
+            $userAgent,
             $extraHttpHeaders,
             $failOnHttpStatusCodes,
             $failOnConsoleExceptions,
@@ -259,6 +265,7 @@ function (
             $waitForExpression,
             $emulatedMediaType,
             $cookies,
+            $userAgent,
             $extraHttpHeaders,
             $failOnHttpStatusCodes,
             $failOnConsoleExceptions,
@@ -295,6 +302,7 @@ function (
             new ChromiumCookie('yummy_cookie', 'choco', 'theyummycookie.com'),
             new ChromiumCookie('vanilla_cookie', 'vanilla', 'theyummycookie.com', '/', true, true, 'Lax'),
         ],
+        'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko)',
         [
             'My-Http-Header' => 'Http Header content',
             'My-Second-Http-Header' => 'Second Http Header content',
@@ -343,6 +351,7 @@ function (
         string|null $waitForExpression = null,
         string|null $emulatedMediaType = null,
         array $cookies = [],
+        string|null $userAgent = null,
         array $extraHttpHeaders = [],
         array $failOnHttpStatusCodes = [],
         bool $failOnConsoleExceptions = false,
@@ -374,6 +383,7 @@ function (
             $waitForExpression,
             $emulatedMediaType,
             $cookies,
+            $userAgent,
             $extraHttpHeaders,
             $failOnHttpStatusCodes,
             $failOnConsoleExceptions,
@@ -418,6 +428,7 @@ function (
             $waitForExpression,
             $emulatedMediaType,
             $cookies,
+            $userAgent,
             $extraHttpHeaders,
             $failOnHttpStatusCodes,
             $failOnConsoleExceptions,
@@ -463,6 +474,7 @@ function (
             new ChromiumCookie('yummy_cookie', 'choco', 'theyummycookie.com'),
             new ChromiumCookie('vanilla_cookie', 'vanilla', 'theyummycookie.com', '/', true, true, 'Lax'),
         ],
+        'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko)',
         [
             'My-Http-Header' => 'Http Header content',
             'My-Second-Http-Header' => 'Second Http Header content',
@@ -507,6 +519,7 @@ function hydrateChromiumPdfFormData(
     string|null $waitForExpression = null,
     string|null $emulatedMediaType = null,
     array $cookies = [],
+    string|null $userAgent = null,
     array $extraHttpHeaders = [],
     array $failOnHttpStatusCodes = [],
     bool $failOnConsoleExceptions = false,
@@ -580,6 +593,10 @@ function hydrateChromiumPdfFormData(
         $chromium->cookies($cookies);
     }
 
+    if ($userAgent !== null) {
+        $chromium->userAgent($userAgent);
+    }
+
     if (count($extraHttpHeaders) > 0) {
         $chromium->extraHttpHeaders($extraHttpHeaders);
     }
@@ -643,6 +660,7 @@ function expectChromiumPdfOptions(
     string|null $waitForExpression,
     string|null $emulatedMediaType,
     array $cookies,
+    string|null $userAgent,
     array $extraHttpHeaders,
     array $failOnHttpStatusCodes,
     bool $failOnConsoleExceptions,
@@ -698,6 +716,8 @@ function expectChromiumPdfOptions(
         expect($body)->toContainFormValue('cookies', $json);
     }
 
+    expect($body)->unless($userAgent === null, fn ($body) => $body->toContainFormValue('userAgent', $userAgent));
+
     if (count($extraHttpHeaders) > 0) {
         $json = json_encode($extraHttpHeaders);
         if ($json === false) {
diff --git a/tests/Modules/ChromiumScreenshotTest.php b/tests/Modules/ChromiumScreenshotTest.php
index 563919a..40138ee 100644
--- a/tests/Modules/ChromiumScreenshotTest.php
+++ b/tests/Modules/ChromiumScreenshotTest.php
@@ -29,6 +29,7 @@ function (
         string|null $waitForExpression = null,
         string|null $emulatedMediaType = null,
         array $cookies = [],
+        string|null $userAgent = null,
         array $extraHttpHeaders = [],
         array $failOnHttpStatusCodes = [],
         bool $failOnConsoleExceptions = false,
@@ -49,6 +50,7 @@ function (
             $waitForExpression,
             $emulatedMediaType,
             $cookies,
+            $userAgent,
             $extraHttpHeaders,
             $failOnHttpStatusCodes,
             $failOnConsoleExceptions,
@@ -75,6 +77,7 @@ function (
             $waitForExpression,
             $emulatedMediaType,
             $cookies,
+            $userAgent,
             $extraHttpHeaders,
             $failOnHttpStatusCodes,
             $failOnConsoleExceptions,
@@ -100,6 +103,7 @@ function (
             new ChromiumCookie('yummy_cookie', 'choco', 'theyummycookie.com'),
             new ChromiumCookie('vanilla_cookie', 'vanilla', 'theyummycookie.com', '/', true, true, 'Lax'),
         ],
+        'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko)',
         [
             'My-Http-Header' => 'HTTP Header content',
             'My-Second-Http-Header' => 'Second HTTP Header content',
@@ -134,6 +138,7 @@ function (
         string|null $waitForExpression = null,
         string|null $emulatedMediaType = null,
         array $cookies = [],
+        string|null $userAgent = null,
         array $extraHttpHeaders = [],
         array $failOnHttpStatusCodes = [],
         bool $failOnConsoleExceptions = false,
@@ -154,6 +159,7 @@ function (
             $waitForExpression,
             $emulatedMediaType,
             $cookies,
+            $userAgent,
             $extraHttpHeaders,
             $failOnHttpStatusCodes,
             $failOnConsoleExceptions,
@@ -182,6 +188,7 @@ function (
             $waitForExpression,
             $emulatedMediaType,
             $cookies,
+            $userAgent,
             $extraHttpHeaders,
             $failOnHttpStatusCodes,
             $failOnConsoleExceptions,
@@ -207,6 +214,7 @@ function (
             new ChromiumCookie('yummy_cookie', 'choco', 'theyummycookie.com'),
             new ChromiumCookie('vanilla_cookie', 'vanilla', 'theyummycookie.com', '/', true, true, 'Lax'),
         ],
+        'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko)',
         [
             'My-Http-Header' => 'Http Header content',
             'My-Second-Http-Header' => 'Second Http Header content',
@@ -243,6 +251,7 @@ function (
         string|null $waitForExpression = null,
         string|null $emulatedMediaType = null,
         array $cookies = [],
+        string|null $userAgent = null,
         array $extraHttpHeaders = [],
         array $failOnHttpStatusCodes = [],
         bool $failOnConsoleExceptions = false,
@@ -263,6 +272,7 @@ function (
             $waitForExpression,
             $emulatedMediaType,
             $cookies,
+            $userAgent,
             $extraHttpHeaders,
             $failOnHttpStatusCodes,
             $failOnConsoleExceptions,
@@ -296,6 +306,7 @@ function (
             $waitForExpression,
             $emulatedMediaType,
             $cookies,
+            $userAgent,
             $extraHttpHeaders,
             $failOnHttpStatusCodes,
             $failOnConsoleExceptions,
@@ -330,6 +341,7 @@ function (
             new ChromiumCookie('yummy_cookie', 'choco', 'theyummycookie.com'),
             new ChromiumCookie('vanilla_cookie', 'vanilla', 'theyummycookie.com', '/', true, true, 'Lax'),
         ],
+        'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko)',
         [
             'My-Http-Header' => 'Http Header content',
             'My-Second-Http-Header' => 'Second Http Header content',
@@ -362,6 +374,7 @@ function hydrateChromiumScreenshotFormData(
     string|null $waitForExpression = null,
     string|null $emulatedMediaType = null,
     array $cookies = [],
+    string|null $userAgent = null,
     array $extraHttpHeaders = [],
     array $failOnHttpStatusCodes = [],
     bool $failOnConsoleExceptions = false,
@@ -424,6 +437,10 @@ function hydrateChromiumScreenshotFormData(
         $chromium->cookies($cookies);
     }
 
+    if ($userAgent !== null) {
+        $chromium->userAgent($userAgent);
+    }
+
     if (count($extraHttpHeaders) > 0) {
         $chromium->extraHttpHeaders($extraHttpHeaders);
     }
@@ -466,6 +483,7 @@ function expectChromiumScreenshotOptions(
     string|null $waitForExpression,
     string|null $emulatedMediaType,
     array $cookies,
+    string|null $userAgent,
     array $extraHttpHeaders,
     array $failOnHttpStatusCodes,
     bool $failOnConsoleExceptions,
@@ -492,6 +510,8 @@ function expectChromiumScreenshotOptions(
         expect($body)->toContainFormValue('cookies', $json);
     }
 
+    expect($body)->unless($userAgent === null, fn ($body) => $body->toContainFormValue('userAgent', $userAgent));
+
     if (count($extraHttpHeaders) > 0) {
         $json = json_encode($extraHttpHeaders);
         if ($json === false) {