diff --git a/mail/signup.tpl b/mail/signup.tpl
new file mode 100644
index 0000000..c93b404
--- /dev/null
+++ b/mail/signup.tpl
@@ -0,0 +1,13 @@
+Hi,
+
+You recently signed up on MapGuesser with this email address ({{EMAIL}}). To activate your account, please click on the following link:
+<a href="{{ACTIVATE_LINK}}" title="Account activation">{{ACTIVATE_LINK}}</a>
+
+If you did not sign up on MapGuesser or changed your mind, no further action is required, your email address will be deleted soon.
+However if you want to immediately delete it, please click on the following link:
+<a href="{{CANCEL_LINK}}" title="Sign up cancellation">{{CANCEL_LINK}}</a>
+
+Have fun on MapGuesser!
+
+Regards,
+MapGuesser
diff --git a/public/static/js/signup.js b/public/static/js/signup.js
new file mode 100644
index 0000000..4031b32
--- /dev/null
+++ b/public/static/js/signup.js
@@ -0,0 +1,47 @@
+(function () {
+    var form = document.getElementById('signupForm');
+
+    form.onsubmit = function (e) {
+        document.getElementById('loading').style.visibility = 'visible';
+
+        e.preventDefault();
+
+        var formData = new FormData(form);
+
+        MapGuesser.httpRequest('POST', form.action, function () {
+            document.getElementById('loading').style.visibility = 'hidden';
+
+            if (this.response.error) {
+                var errorText;
+                switch (this.response.error) {
+                    case 'passwords_too_short':
+                        errorText = 'The given password is too short. Please choose a password that is at least 6 characters long!'
+                        break;
+                    case 'passwords_not_match':
+                        errorText = 'The given passwords do not match.'
+                        break;
+                    case 'user_found':
+                        errorText = 'There is a user already registered with the given email address. Please <a href="/login" title="Login">login here</a>!';
+                        break;
+                    case 'not_active_user_found':
+                        errorText = 'There is a user already registered with the given email address. Please check your email and click on the activation link!';
+                        break;
+                }
+
+                var signupFormError = document.getElementById('signupFormError');
+                signupFormError.style.display = 'block';
+                signupFormError.innerHTML = errorText;
+
+                form.elements.email.select();
+
+                return;
+            }
+
+            document.getElementById('signupFormError').style.display = 'none';
+            form.reset();
+            form.elements.email.focus();
+
+            MapGuesser.showModalWithContent('Sign up successful', 'Sign up was successful. Please check your email and click on the activation link to activate your account!');
+        }, formData);
+    };
+})();
diff --git a/src/Controller/SignupController.php b/src/Controller/SignupController.php
new file mode 100644
index 0000000..ea049bc
--- /dev/null
+++ b/src/Controller/SignupController.php
@@ -0,0 +1,192 @@
+<?php namespace MapGuesser\Controller;
+
+use MapGuesser\Database\Query\Modify;
+use MapGuesser\Database\Query\Select;
+use MapGuesser\Interfaces\Database\IResultSet;
+use MapGuesser\Interfaces\Request\IRequest;
+use MapGuesser\Interfaces\Response\IContent;
+use MapGuesser\Interfaces\Response\IRedirect;
+use MapGuesser\Mailing\Mail;
+use MapGuesser\Model\User;
+use MapGuesser\Response\HtmlContent;
+use MapGuesser\Response\JsonContent;
+use MapGuesser\Response\Redirect;
+
+class SignupController
+{
+    private IRequest $request;
+
+    public function __construct(IRequest $request)
+    {
+        $this->request = $request;
+    }
+
+    public function getSignupForm()
+    {
+        $session = $this->request->session();
+
+        if ($session->get('user')) {
+            return new Redirect([\Container::$routeCollection->getRoute('index'), []], IRedirect::TEMPORARY);
+        }
+
+        $data = [];
+        return new HtmlContent('signup/signup', $data);
+    }
+
+    public function signup(): IContent
+    {
+        $session = $this->request->session();
+
+        if ($session->get('user')) {
+            //TODO: return with some error
+            $data = ['success' => true];
+            return new JsonContent($data);
+        }
+
+        $select = new Select(\Container::$dbConnection, 'users');
+        $select->columns(User::getFields());
+        $select->where('email', '=', $this->request->post('email'));
+
+        $userData = $select->execute()->fetch(IResultSet::FETCH_ASSOC);
+
+        if ($userData !== null) {
+            $user = new User($userData);
+
+            if ($user->getActive()) {
+                $data = ['error' => 'user_found'];
+            } else {
+                $data = ['error' => 'not_active_user_found'];
+            }
+            return new JsonContent($data);
+        }
+
+        if (strlen($this->request->post('password')) < 6) {
+            $data = ['error' => 'passwords_too_short'];
+            return new JsonContent($data);
+        }
+
+        if ($this->request->post('password') !== $this->request->post('password_confirm')) {
+            $data = ['error' => 'passwords_not_match'];
+            return new JsonContent($data);
+        }
+
+        $user = new User([
+            'email' => $this->request->post('email'),
+        ]);
+
+        $user->setPlainPassword($this->request->post('password'));
+
+        \Container::$dbConnection->startTransaction();
+
+        $modify = new Modify(\Container::$dbConnection, 'users');
+        $modify->fill($user->toArray());
+        $modify->save();
+        $userId = $modify->getId();
+
+        $token = hash('sha256', serialize($user) . random_bytes(10) . microtime());
+
+        $modify = new Modify(\Container::$dbConnection, 'user_confirmations');
+        $modify->set('user_id', $userId);
+        $modify->set('token', $token);
+        $modify->save();
+
+        \Container::$dbConnection->commit();
+
+        $this->sendConfirmationEmail($user->getEmail(), $token);
+
+        $data = ['success' => true];
+        return new JsonContent($data);
+    }
+
+    public function activate()
+    {
+        $session = $this->request->session();
+
+        if ($session->get('user')) {
+            return new Redirect([\Container::$routeCollection->getRoute('index'), []], IRedirect::TEMPORARY);
+        }
+
+        $select = new Select(\Container::$dbConnection, 'user_confirmations');
+        $select->columns(['id', 'user_id']);
+        $select->where('token', '=', $this->request->query('token'));
+
+        $confirmation = $select->execute()->fetch(IResultSet::FETCH_ASSOC);
+
+        if ($confirmation === null) {
+            $data = [];
+            return new HtmlContent('signup/activate', $data);
+        }
+
+        \Container::$dbConnection->startTransaction();
+
+        $modify = new Modify(\Container::$dbConnection, 'user_confirmations');
+        $modify->setId($confirmation['id']);
+        $modify->delete();
+
+        $modify = new Modify(\Container::$dbConnection, 'users');
+        $modify->setId($confirmation['user_id']);
+        $modify->set('active', true);
+        $modify->save();
+
+        \Container::$dbConnection->commit();
+
+        $select = new Select(\Container::$dbConnection, 'users');
+        $select->columns(User::getFields());
+        $select->whereId($confirmation['user_id']);
+
+        $userData = $select->execute()->fetch(IResultSet::FETCH_ASSOC);
+        $user = new User($userData);
+
+        $session->set('user', $user);
+
+        return new Redirect([\Container::$routeCollection->getRoute('index'), []], IRedirect::TEMPORARY);
+    }
+
+    public function cancel()
+    {
+        $session = $this->request->session();
+
+        if ($session->get('user')) {
+            return new Redirect([\Container::$routeCollection->getRoute('index'), []], IRedirect::TEMPORARY);
+        }
+
+        $select = new Select(\Container::$dbConnection, 'user_confirmations');
+        $select->columns(['id', 'user_id']);
+        $select->where('token', '=', $this->request->query('token'));
+
+        $confirmation = $select->execute()->fetch(IResultSet::FETCH_ASSOC);
+
+        if ($confirmation === null) {
+            $data = ['success' => false];
+            return new HtmlContent('signup/cancel', $data);
+        }
+
+        \Container::$dbConnection->startTransaction();
+
+        $modify = new Modify(\Container::$dbConnection, 'user_confirmations');
+        $modify->setId($confirmation['id']);
+        $modify->delete();
+
+        $modify = new Modify(\Container::$dbConnection, 'users');
+        $modify->setId($confirmation['user_id']);
+        $modify->delete();
+
+        \Container::$dbConnection->commit();
+
+        $data = ['success' => true];
+        return new HtmlContent('signup/cancel', $data);
+    }
+
+    private function sendConfirmationEmail($email, $token): void
+    {
+        $mail = new Mail();
+        $mail->addRecipient($email);
+        $mail->setSubject('Welcome to MapGuesser - Activate your account');
+        $mail->setBodyFromTemplate('signup', [
+            'EMAIL' => $email,
+            'ACTIVATE_LINK' => $this->request->getBase() . '/signup/activate/' . $token,
+            'CANCEL_LINK' => $this->request->getBase() . '/signup/cancel/' . $token,
+        ]);
+        $mail->send();
+    }
+}
diff --git a/views/signup/activate.php b/views/signup/activate.php
new file mode 100644
index 0000000..6ad9b78
--- /dev/null
+++ b/views/signup/activate.php
@@ -0,0 +1,9 @@
+<?php require ROOT . '/views/templates/main_header.php'; ?>
+<?php require ROOT . '/views/templates/header.php'; ?>
+<div class="main">
+    <h2>Account activation</h2>
+    <div class="box">
+        <p class="error justify">Activation failed. Please check the link you entered or retry <a href="/signup" title="Sign up">sign up</a>!</p>
+    </div>
+</div>
+<?php require ROOT . '/views/templates/main_footer.php'; ?>
\ No newline at end of file
diff --git a/views/signup/cancel.php b/views/signup/cancel.php
new file mode 100644
index 0000000..c22293e
--- /dev/null
+++ b/views/signup/cancel.php
@@ -0,0 +1,13 @@
+<?php require ROOT . '/views/templates/main_header.php'; ?>
+<?php require ROOT . '/views/templates/header.php'; ?>
+<div class="main">
+    <h2>Account cancellation</h2>
+    <div class="box">
+        <?php if ($success) : ?>
+            <p class="justify">Cancellation was successfull. You can <a href="/signup" title="Sign up">sign up</a> any time if you want!</p>
+        <?php else: ?>
+            <p class="error justify">Cancellation failed. Please check the link you entered! Maybe the account was already deleted, in this case no further action is required.</p>
+        <?php endif; ?>
+    </div>
+</div>
+<?php require ROOT . '/views/templates/main_footer.php'; ?>
\ No newline at end of file
diff --git a/views/signup/signup.php b/views/signup/signup.php
new file mode 100644
index 0000000..e6be4e4
--- /dev/null
+++ b/views/signup/signup.php
@@ -0,0 +1,22 @@
+<?php
+$jsFiles = [
+    'js/signup.js',
+];
+?>
+<?php require ROOT . '/views/templates/main_header.php'; ?>
+<?php require ROOT . '/views/templates/header.php'; ?>
+<div class="main">
+    <h2>Sign up</h2>
+    <div class="box">
+        <form id="signupForm" action="/signup" method="post">
+            <input class="big fullWidth" type="email" name="email" placeholder="Email address" autofocus>
+            <input class="big fullWidth marginTop" type="password" name="password" placeholder="Password">
+            <input class="big fullWidth marginTop" type="password" name="password_confirm" placeholder="Password confirmation">
+            <p id="signupFormError" class="formError justify marginTop"></p>
+            <div class="right marginTop">
+                <button type="submit">Sign up</button>
+            </div>
+        </form>
+    </div>
+</div>
+<?php require ROOT . '/views/templates/main_footer.php'; ?>
\ No newline at end of file
diff --git a/web.php b/web.php
index b9ef8a1..e8e159e 100644
--- a/web.php
+++ b/web.php
@@ -15,6 +15,10 @@ Container::$routeCollection = new MapGuesser\Routing\RouteCollection();
 Container::$routeCollection->get('index', '', [MapGuesser\Controller\HomeController::class, 'getIndex']);
 Container::$routeCollection->get('login', 'login', [MapGuesser\Controller\LoginController::class, 'getLoginForm']);
 Container::$routeCollection->post('login-action', 'login', [MapGuesser\Controller\LoginController::class, 'login']);
+Container::$routeCollection->get('signup', 'signup', [MapGuesser\Controller\SignupController::class, 'getSignupForm']);
+Container::$routeCollection->post('signup-action', 'signup', [MapGuesser\Controller\SignupController::class, 'signup']);
+Container::$routeCollection->get('signup.activate', 'signup/activate/{token}', [MapGuesser\Controller\SignupController::class, 'activate']);
+Container::$routeCollection->get('signup.cancel', 'signup/cancel/{token}', [MapGuesser\Controller\SignupController::class, 'cancel']);
 Container::$routeCollection->get('logout', 'logout', [MapGuesser\Controller\LoginController::class, 'logout']);
 Container::$routeCollection->get('maps', 'maps', [MapGuesser\Controller\MapsController::class, 'getMaps']);
 Container::$routeCollection->group('game', function (MapGuesser\Routing\RouteCollection $routeCollection) {