diff --git a/components/Posting/Controller/Posting.php b/components/Posting/Controller/Posting.php
new file mode 100644
index 0000000000..2da6960156
--- /dev/null
+++ b/components/Posting/Controller/Posting.php
@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Component\Posting\Controller;
+
+use App\Core;
+use App\Core\Controller;
+use App\Core\Event;
+use function App\Core\I18n\_m;
+use App\Core\VisibilityScope;
+use App\Util\Common;
+use App\Util\Exception\ClientException;
+use Component\Posting\Form;
+use Symfony\Component\HttpFoundation\File\Exception\FormSizeFileException;
+use Symfony\Component\HttpFoundation\RedirectResponse;
+use Symfony\Component\HttpFoundation\Request;
+
+class Posting extends Controller
+{
+    public function onPost(Request $request): RedirectResponse
+    {
+        $actor = Common::actor();
+        $form  = Form\Posting::create($request);
+
+        $form->handleRequest($request);
+        if ($form->isSubmitted()) {
+            try {
+                if ($form->isValid()) {
+                    $data = $form->getData();
+                    Event::handle('PostingModifyData', [$request, $actor, &$data, $form]);
+
+                    if (empty($data['content']) && empty($data['attachments'])) {
+                        // TODO Display error: At least one of `content` and `attachments` must be provided
+                        throw new ClientException(_m('You must enter content or provide at least one attachment to post a note.'));
+                    }
+
+                    if (\is_null(VisibilityScope::tryFrom($data['visibility']))) {
+                        throw new ClientException(_m('You have selected an impossible visibility.'));
+                    }
+
+                    $extra_args = [];
+                    Event::handle('AddExtraArgsToNoteContent', [$request, $actor, $data, &$extra_args, $form]);
+
+                    if (\array_key_exists('in', $data) && $data['in'] !== 'public') {
+                        $target = $data['in'];
+                    }
+
+                    \Component\Posting\Posting::storeLocalNote(
+                        actor: $actor,
+                        content: $data['content'],
+                        content_type: $data['content_type'],
+                        locale: $data['language'],
+                        scope: VisibilityScope::from($data['visibility']),
+                        targets: isset($target) ? [$target] : [],
+                        reply_to: $data['reply_to_id'],
+                        attachments: $data['attachments'],
+                        process_note_content_extra_args: $extra_args,
+                    );
+
+                    return Core\Form::forceRedirect($form, $request);
+                }
+            } catch (FormSizeFileException $e) {
+                throw new ClientException(_m('Invalid file size given'), previous: $e);
+            }
+        }
+        throw new ClientException(_m('Invalid form submission'));
+    }
+}
diff --git a/components/Posting/Form/Posting.php b/components/Posting/Form/Posting.php
new file mode 100644
index 0000000000..47a50b19ee
--- /dev/null
+++ b/components/Posting/Form/Posting.php
@@ -0,0 +1,102 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Component\Posting\Form;
+
+use App\Core\ActorLocalRoles;
+use App\Core\Event;
+use App\Core\Form;
+use function App\Core\I18n\_m;
+use App\Core\Router\Router;
+use App\Core\VisibilityScope;
+use App\Entity\Actor;
+use App\Util\Common;
+use App\Util\Form\FormFields;
+use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
+use Symfony\Component\Form\Extension\Core\Type\FileType;
+use Symfony\Component\Form\Extension\Core\Type\SubmitType;
+use Symfony\Component\Form\Extension\Core\Type\TextareaType;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Validator\Constraints\Length;
+
+class Posting
+{
+    public static function create(Request $request)
+    {
+        $actor = Common::actor();
+
+        $placeholder_strings = ['How are you feeling?', 'Have something to share?', 'How was your day?'];
+        Event::handle('PostingPlaceHolderString', [&$placeholder_strings]);
+        $placeholder = $placeholder_strings[array_rand($placeholder_strings)];
+
+        $initial_content = '';
+        Event::handle('PostingInitialContent', [&$initial_content]);
+
+        $available_content_types = [
+            _m('Plain Text') => 'text/plain',
+        ];
+        Event::handle('PostingAvailableContentTypes', [&$available_content_types]);
+
+        $in_targets = [];
+        Event::handle('PostingFillTargetChoices', [$request, $actor, &$in_targets]);
+
+        $context_actor = null;
+        Event::handle('PostingGetContextActor', [$request, $actor, &$context_actor]);
+
+        $form_params = [];
+        if (!empty($in_targets)) { // @phpstan-ignore-line
+            // Add "none" option to the first of choices
+            $in_targets = array_merge([_m('Public') => 'public'], $in_targets);
+            // Make the context actor the first In target option
+            if (!\is_null($context_actor)) {
+                foreach ($in_targets as $it_nick => $it_id) {
+                    if ($it_id === $context_actor->getId()) {
+                        unset($in_targets[$it_nick]);
+                        $in_targets = array_merge([$it_nick => $it_id], $in_targets);
+                        break;
+                    }
+                }
+            }
+            $form_params[] = ['in', ChoiceType::class, ['label' => _m('In:'), 'multiple' => false, 'expanded' => false, 'choices' => $in_targets]];
+        }
+
+        $visibility_options = [
+            _m('Public')    => VisibilityScope::EVERYWHERE->value,
+            _m('Local')     => VisibilityScope::LOCAL->value,
+            _m('Addressee') => VisibilityScope::ADDRESSEE->value,
+        ];
+        if (!\is_null($context_actor) && $context_actor->isGroup()) { // @phpstan-ignore-line currently an open bug. See https://web.archive.org/web/20220226131651/https://github.com/phpstan/phpstan/issues/6234
+            if ($actor->canModerate($context_actor)) {
+                if ($context_actor->getRoles() & ActorLocalRoles::PRIVATE_GROUP) {
+                    $visibility_options = array_merge([_m('Group') => VisibilityScope::GROUP->value], $visibility_options);
+                } else {
+                    $visibility_options[_m('Group')] = VisibilityScope::GROUP->value;
+                }
+            }
+        }
+        $form_params[] = ['visibility', ChoiceType::class, ['label' => _m('Visibility:'), 'multiple' => false, 'expanded' => false, 'choices' => $visibility_options]];
+
+        $form_params[] = ['content', TextareaType::class, ['label' => _m('Content:'), 'data' => $initial_content, 'attr' => ['placeholder' => _m($placeholder)], 'constraints' => [new Length(['max' => Common::config('site', 'text_limit')])]]];
+        $form_params[] = ['attachments', FileType::class, ['label' => _m('Attachments:'), 'multiple' => true, 'required' => false, 'invalid_message' => _m('Attachment not valid.')]];
+        $form_params[] = FormFields::language($actor, $context_actor, label: _m('Note language'), help: _m('The selected language will be federated and added as a lang attribute, preferred language can be set up in settings'));
+
+        if (\count($available_content_types) > 1) {
+            $form_params[] = ['content_type', ChoiceType::class,
+                [
+                    'label'   => _m('Text format:'), 'multiple' => false, 'expanded' => false,
+                    'data'    => $available_content_types[array_key_first($available_content_types)],
+                    'choices' => $available_content_types,
+                ],
+            ];
+        } else {
+            $form_params[] = ['content_type', HiddenType::class, ['data' => $available_content_types[array_key_first($available_content_types)]]];
+        }
+
+        Event::handle('PostingAddFormEntries', [$request, $actor, &$form_params]);
+
+        $form_params[] = ['post_note', SubmitType::class, ['label' => _m('Post')]];
+
+        return Form::create($form_params, form_options: ['action' => Router::url(\Component\Posting\Posting::route)]);
+    }
+}
diff --git a/components/Posting/Posting.php b/components/Posting/Posting.php
index faf63ba268..810fcfa18b 100644
--- a/components/Posting/Posting.php
+++ b/components/Posting/Posting.php
@@ -23,14 +23,13 @@ declare(strict_types = 1);
 
 namespace Component\Posting;
 
-use App\Core\ActorLocalRoles;
 use App\Core\Cache;
 use App\Core\DB\DB;
 use App\Core\Event;
-use App\Core\Form;
 use App\Core\GSFile;
 use function App\Core\I18n\_m;
 use App\Core\Modules\Component;
+use App\Core\Router\RouteLoader;
 use App\Core\Router\Router;
 use App\Core\VisibilityScope;
 use App\Entity\Activity;
@@ -42,7 +41,6 @@ use App\Util\Exception\ClientException;
 use App\Util\Exception\DuplicateFoundException;
 use App\Util\Exception\RedirectException;
 use App\Util\Exception\ServerException;
-use App\Util\Form\FormFields;
 use App\Util\Formatting;
 use App\Util\HTML;
 use Component\Attachment\Entity\ActorToAttachment;
@@ -51,18 +49,19 @@ use Component\Conversation\Conversation;
 use Component\Language\Entity\Language;
 use Component\Notification\Entity\Attention;
 use Functional as F;
-use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
-use Symfony\Component\Form\Extension\Core\Type\FileType;
-use Symfony\Component\Form\Extension\Core\Type\SubmitType;
-use Symfony\Component\Form\Extension\Core\Type\TextareaType;
-use Symfony\Component\HttpFoundation\File\Exception\FormSizeFileException;
 use Symfony\Component\HttpFoundation\File\UploadedFile;
 use Symfony\Component\HttpFoundation\Request;
-use Symfony\Component\Routing\Exception\ResourceNotFoundException;
-use Symfony\Component\Validator\Constraints\Length;
 
 class Posting extends Component
 {
+    public const route = 'posting_form_action';
+
+    public function onAddRoute(RouteLoader $r): bool
+    {
+        $r->connect(self::route, '/form/posting', Controller\Posting::class);
+        return Event::next;
+    }
+
     /**
      * HTML render event handler responsible for adding and handling
      * the result of adding the note submission form, only if a user is logged in
@@ -79,133 +78,7 @@ class Posting extends Component
             return Event::next;
         }
 
-        $actor = $user->getActor();
-
-        $placeholder_strings = ['How are you feeling?', 'Have something to share?', 'How was your day?'];
-        Event::handle('PostingPlaceHolderString', [&$placeholder_strings]);
-        $placeholder = $placeholder_strings[array_rand($placeholder_strings)];
-
-        $initial_content = '';
-        Event::handle('PostingInitialContent', [&$initial_content]);
-
-        $available_content_types = [
-            _m('Plain Text') => 'text/plain',
-        ];
-        Event::handle('PostingAvailableContentTypes', [&$available_content_types]);
-
-        $in_targets = [];
-        Event::handle('PostingFillTargetChoices', [$request, $actor, &$in_targets]);
-
-        $context_actor = null;
-        Event::handle('PostingGetContextActor', [$request, $actor, &$context_actor]);
-
-        $form_params = [];
-        if (!empty($in_targets)) { // @phpstan-ignore-line
-            // Add "none" option to the first of choices
-            $in_targets = array_merge([_m('Public') => 'public'], $in_targets);
-            // Make the context actor the first In target option
-            if (!\is_null($context_actor)) {
-                foreach ($in_targets as $it_nick => $it_id) {
-                    if ($it_id === $context_actor->getId()) {
-                        unset($in_targets[$it_nick]);
-                        $in_targets = array_merge([$it_nick => $it_id], $in_targets);
-                        break;
-                    }
-                }
-            }
-            $form_params[] = ['in', ChoiceType::class, ['label' => _m('In:'), 'multiple' => false, 'expanded' => false, 'choices' => $in_targets]];
-        }
-
-        $visibility_options = [
-            _m('Public')    => VisibilityScope::EVERYWHERE->value,
-            _m('Local')     => VisibilityScope::LOCAL->value,
-            _m('Addressee') => VisibilityScope::ADDRESSEE->value,
-        ];
-        if (!\is_null($context_actor) && $context_actor->isGroup()) { // @phpstan-ignore-line currently an open bug. See https://web.archive.org/web/20220226131651/https://github.com/phpstan/phpstan/issues/6234
-            if ($actor->canModerate($context_actor)) {
-                if ($context_actor->getRoles() & ActorLocalRoles::PRIVATE_GROUP) {
-                    $visibility_options = array_merge([_m('Group') => VisibilityScope::GROUP->value], $visibility_options);
-                } else {
-                    $visibility_options[_m('Group')] = VisibilityScope::GROUP->value;
-                }
-            }
-        }
-        $form_params[] = ['visibility', ChoiceType::class, ['label' => _m('Visibility:'), 'multiple' => false, 'expanded' => false, 'choices' => $visibility_options]];
-
-        $form_params[] = ['content', TextareaType::class, ['label' => _m('Content:'), 'data' => $initial_content, 'attr' => ['placeholder' => _m($placeholder)], 'constraints' => [new Length(['max' => Common::config('site', 'text_limit')])]]];
-        $form_params[] = ['attachments', FileType::class, ['label' => _m('Attachments:'), 'multiple' => true, 'required' => false, 'invalid_message' => _m('Attachment not valid.')]];
-        $form_params[] = FormFields::language($actor, $context_actor, label: _m('Note language'), help: _m('The selected language will be federated and added as a lang attribute, preferred language can be set up in settings'));
-
-        if (\count($available_content_types) > 1) {
-            $form_params[] = ['content_type', ChoiceType::class,
-                [
-                    'label'   => _m('Text format:'), 'multiple' => false, 'expanded' => false,
-                    'data'    => $available_content_types[array_key_first($available_content_types)],
-                    'choices' => $available_content_types,
-                ],
-            ];
-        }
-
-        Event::handle('PostingAddFormEntries', [$request, $actor, &$form_params]);
-
-        $form_params[] = ['post_note', SubmitType::class, ['label' => _m('Post')]];
-        $form          = Form::create($form_params);
-
-        $form->handleRequest($request);
-        if ($form->isSubmitted()) {
-            try {
-                if ($form->isValid()) {
-                    $data = $form->getData();
-                    Event::handle('PostingModifyData', [$request, $actor, &$data, $form_params, $form]);
-
-                    if (empty($data['content']) && empty($data['attachments'])) {
-                        // TODO Display error: At least one of `content` and `attachments` must be provided
-                        throw new ClientException(_m('You must enter content or provide at least one attachment to post a note.'));
-                    }
-
-                    if (\is_null(VisibilityScope::tryFrom($data['visibility']))) {
-                        throw new ClientException(_m('You have selected an impossible visibility.'));
-                    }
-
-                    $content_type = $data['content_type'] ?? $available_content_types[array_key_first($available_content_types)];
-                    $extra_args   = [];
-                    Event::handle('AddExtraArgsToNoteContent', [$request, $actor, $data, &$extra_args, $form_params, $form]);
-
-                    if (\array_key_exists('in', $data) && $data['in'] !== 'public') {
-                        $target = $data['in'];
-                    }
-
-                    self::storeLocalNote(
-                        actor: $user->getActor(),
-                        content: $data['content'],
-                        content_type: $content_type,
-                        locale: $data['language'],
-                        scope: VisibilityScope::from($data['visibility']),
-                        targets: isset($target) ? [$target] : [],
-                        reply_to: $data['reply_to_id'],
-                        attachments: $data['attachments'],
-                        process_note_content_extra_args: $extra_args,
-                    );
-
-                    try {
-                        if ($request->query->has('from')) {
-                            $from = $request->query->get('from');
-                            if (str_contains($from, '#')) {
-                                [$from, $fragment] = explode('#', $from);
-                            }
-                            Router::match($from);
-                            throw new RedirectException(url: $from . (isset($fragment) ? '#' . $fragment : ''));
-                        }
-                    } catch (ResourceNotFoundException $e) {
-                        // continue
-                    }
-                    throw new RedirectException();
-                }
-            } catch (FormSizeFileException $e) {
-                throw new ClientException(_m('Invalid file size given'), previous: $e);
-            }
-        }
-        $res['post_form'] = $form->createView();
+        $res['post_form'] = Form\Posting::create($request)->createView();
 
         return Event::next;
     }