diff --git a/composer.json b/composer.json
index 6a279051..1b25ba49 100644
--- a/composer.json
+++ b/composer.json
@@ -50,7 +50,7 @@
         "shlinkio/shlink-config": "dev-main#2a5b5c2 as 2.4",
         "shlinkio/shlink-event-dispatcher": "^2.6",
         "shlinkio/shlink-importer": "^5.0",
-        "shlinkio/shlink-installer": "dev-develop#5fcee9b as 8.3",
+        "shlinkio/shlink-installer": "dev-develop#7f6fce7 as 8.3",
         "shlinkio/shlink-ip-geolocation": "^3.2",
         "spiral/roadrunner": "^2.11",
         "spiral/roadrunner-jobs": "^2.5",
diff --git a/config/autoload/installer.global.php b/config/autoload/installer.global.php
index fbc5fa03..029a50d6 100644
--- a/config/autoload/installer.global.php
+++ b/config/autoload/installer.global.php
@@ -45,6 +45,7 @@ return [
             Option\UrlShortener\AppendExtraPathConfigOption::class,
             Option\UrlShortener\EnableMultiSegmentSlugsConfigOption::class,
             Option\UrlShortener\EnableTrailingSlashConfigOption::class,
+            Option\UrlShortener\ShortUrlModeConfigOption::class,
             Option\Tracking\IpAnonymizationConfigOption::class,
             Option\Tracking\OrphanVisitsTrackingConfigOption::class,
             Option\Tracking\DisableTrackParamConfigOption::class,
diff --git a/module/CLI/src/Command/ShortUrl/CreateShortUrlCommand.php b/module/CLI/src/Command/ShortUrl/CreateShortUrlCommand.php
index 46a1cc8f..6fb1001b 100644
--- a/module/CLI/src/Command/ShortUrl/CreateShortUrlCommand.php
+++ b/module/CLI/src/Command/ShortUrl/CreateShortUrlCommand.php
@@ -5,7 +5,6 @@ declare(strict_types=1);
 namespace Shlinkio\Shlink\CLI\Command\ShortUrl;
 
 use Shlinkio\Shlink\CLI\Util\ExitCodes;
-use Shlinkio\Shlink\Core\Config\EnvVars;
 use Shlinkio\Shlink\Core\Exception\InvalidUrlException;
 use Shlinkio\Shlink\Core\Exception\NonUniqueSlugException;
 use Shlinkio\Shlink\Core\Options\UrlShortenerOptions;
@@ -175,8 +174,7 @@ class CreateShortUrlCommand extends Command
                 ShortUrlInputFilter::TAGS => $tags,
                 ShortUrlInputFilter::CRAWLABLE => $input->getOption('crawlable'),
                 ShortUrlInputFilter::FORWARD_QUERY => !$input->getOption('no-forward-query'),
-                EnvVars::MULTI_SEGMENT_SLUGS_ENABLED->value => $this->options->multiSegmentSlugsEnabled,
-            ], $this->options->mode));
+            ], $this->options));
 
             $io->writeln([
                 sprintf('Processed long URL: <info>%s</info>', $longUrl),
diff --git a/module/Core/src/Options/UrlShortenerOptions.php b/module/Core/src/Options/UrlShortenerOptions.php
index 827988fa..98597bad 100644
--- a/module/Core/src/Options/UrlShortenerOptions.php
+++ b/module/Core/src/Options/UrlShortenerOptions.php
@@ -21,4 +21,9 @@ final class UrlShortenerOptions
         public readonly ShortUrlMode $mode = ShortUrlMode::STRICT,
     ) {
     }
+
+    public function isLooselyMode(): bool
+    {
+        return $this->mode === ShortUrlMode::LOOSELY;
+    }
 }
diff --git a/module/Core/src/ShortUrl/Entity/ShortUrl.php b/module/Core/src/ShortUrl/Entity/ShortUrl.php
index e3d6544c..0328923a 100644
--- a/module/Core/src/ShortUrl/Entity/ShortUrl.php
+++ b/module/Core/src/ShortUrl/Entity/ShortUrl.php
@@ -63,6 +63,9 @@ class ShortUrl extends AbstractEntity
     {
     }
 
+    /**
+     * @internal
+     */
     public static function createFake(): self
     {
         return self::withLongUrl('foo');
@@ -70,6 +73,7 @@ class ShortUrl extends AbstractEntity
 
     /**
      * @param non-empty-string $longUrl
+     * @internal
      */
     public static function withLongUrl(string $longUrl): self
     {
diff --git a/module/Core/src/ShortUrl/Model/ShortUrlCreation.php b/module/Core/src/ShortUrl/Model/ShortUrlCreation.php
index d0d9b279..43b39874 100644
--- a/module/Core/src/ShortUrl/Model/ShortUrlCreation.php
+++ b/module/Core/src/ShortUrl/Model/ShortUrlCreation.php
@@ -6,6 +6,7 @@ namespace Shlinkio\Shlink\Core\ShortUrl\Model;
 
 use Cake\Chronos\Chronos;
 use Shlinkio\Shlink\Core\Exception\ValidationException;
+use Shlinkio\Shlink\Core\Options\UrlShortenerOptions;
 use Shlinkio\Shlink\Core\ShortUrl\Helper\TitleResolutionModelInterface;
 use Shlinkio\Shlink\Core\ShortUrl\Model\Validation\ShortUrlInputFilter;
 use Shlinkio\Shlink\Rest\Entity\ApiKey;
@@ -48,9 +49,10 @@ final class ShortUrlCreation implements TitleResolutionModelInterface
     /**
      * @throws ValidationException
      */
-    public static function fromRawData(array $data, ShortUrlMode $mode = ShortUrlMode::STRICT): self
+    public static function fromRawData(array $data, ?UrlShortenerOptions $options = null): self
     {
-        $inputFilter = ShortUrlInputFilter::withRequiredLongUrl($data);
+        $options = $options ?? new UrlShortenerOptions();
+        $inputFilter = ShortUrlInputFilter::withRequiredLongUrl($data, $options);
         if (! $inputFilter->isValid()) {
             throw ValidationException::fromInputFilter($inputFilter);
         }
@@ -61,7 +63,7 @@ final class ShortUrlCreation implements TitleResolutionModelInterface
 
         return new self(
             longUrl: $inputFilter->getValue(ShortUrlInputFilter::LONG_URL),
-            shortUrlMode: $mode,
+            shortUrlMode: $options->mode,
             deviceLongUrls: $deviceLongUrls,
             validSince: normalizeOptionalDate($inputFilter->getValue(ShortUrlInputFilter::VALID_SINCE)),
             validUntil: normalizeOptionalDate($inputFilter->getValue(ShortUrlInputFilter::VALID_UNTIL)),
diff --git a/module/Core/src/ShortUrl/Model/Validation/CustomSlugFilter.php b/module/Core/src/ShortUrl/Model/Validation/CustomSlugFilter.php
new file mode 100644
index 00000000..8355a003
--- /dev/null
+++ b/module/Core/src/ShortUrl/Model/Validation/CustomSlugFilter.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Core\ShortUrl\Model\Validation;
+
+use Laminas\Filter\FilterInterface;
+use Shlinkio\Shlink\Core\Options\UrlShortenerOptions;
+
+use function is_string;
+use function str_replace;
+use function strtolower;
+use function trim;
+
+class CustomSlugFilter implements FilterInterface
+{
+    public function __construct(private readonly UrlShortenerOptions $options)
+    {
+    }
+
+    public function filter(mixed $value): mixed
+    {
+        if (! is_string($value)) {
+            return $value;
+        }
+
+        $value = $this->options->isLooselyMode() ? strtolower($value) : $value;
+        if ($this->options->multiSegmentSlugsEnabled) {
+            return trim(str_replace(' ', '-', $value), '/');
+        }
+
+        return str_replace([' ', '/'], '-', $value);
+    }
+}
diff --git a/module/Core/src/ShortUrl/Model/Validation/ShortUrlInputFilter.php b/module/Core/src/ShortUrl/Model/Validation/ShortUrlInputFilter.php
index 020cdfd2..9c10d3ff 100644
--- a/module/Core/src/ShortUrl/Model/Validation/ShortUrlInputFilter.php
+++ b/module/Core/src/ShortUrl/Model/Validation/ShortUrlInputFilter.php
@@ -9,16 +9,17 @@ use Laminas\Filter;
 use Laminas\InputFilter\InputFilter;
 use Laminas\Validator;
 use Shlinkio\Shlink\Common\Validation;
-use Shlinkio\Shlink\Core\Config\EnvVars;
+use Shlinkio\Shlink\Core\Options\UrlShortenerOptions;
 use Shlinkio\Shlink\Rest\Entity\ApiKey;
 
-use function is_string;
-use function str_replace;
 use function substr;
-use function trim;
 
 use const Shlinkio\Shlink\MIN_SHORT_CODES_LENGTH;
 
+/**
+ * @todo Pass forCreation/forEdition, instead of withRequiredLongUrl/withNonRequiredLongUrl.
+ *       Make it also dynamically add the relevant fields
+ */
 class ShortUrlInputFilter extends InputFilter
 {
     use Validation\InputFactoryTrait;
@@ -40,23 +41,23 @@ class ShortUrlInputFilter extends InputFilter
     public const CRAWLABLE = 'crawlable';
     public const FORWARD_QUERY = 'forwardQuery';
 
-    private function __construct(array $data, bool $requireLongUrl)
+    private function __construct(array $data, bool $requireLongUrl, UrlShortenerOptions $options)
     {
-        $this->initialize($requireLongUrl, $data[EnvVars::MULTI_SEGMENT_SLUGS_ENABLED->value] ?? false);
+        $this->initialize($requireLongUrl, $options);
         $this->setData($data);
     }
 
-    public static function withRequiredLongUrl(array $data): self
+    public static function withRequiredLongUrl(array $data, UrlShortenerOptions $options): self
     {
-        return new self($data, true);
+        return new self($data, true, $options);
     }
 
     public static function withNonRequiredLongUrl(array $data): self
     {
-        return new self($data, false);
+        return new self($data, false, new UrlShortenerOptions());
     }
 
-    private function initialize(bool $requireLongUrl, bool $multiSegmentEnabled): void
+    private function initialize(bool $requireLongUrl, UrlShortenerOptions $options): void
     {
         $longUrlNotEmptyCommonOptions = [
             Validator\NotEmpty::OBJECT,
@@ -93,10 +94,7 @@ class ShortUrlInputFilter extends InputFilter
         // The only way to enforce the NotEmpty validator to be evaluated when the key is present with an empty value
         // is by using the deprecated setContinueIfEmpty
         $customSlug = $this->createInput(self::CUSTOM_SLUG, false)->setContinueIfEmpty(true);
-        $customSlug->getFilterChain()->attach(new Filter\Callback(match ($multiSegmentEnabled) {
-            true => static fn (mixed $v) => is_string($v) ? trim(str_replace(' ', '-', $v), '/') : $v,
-            false => static fn (mixed $v) => is_string($v) ? str_replace([' ', '/'], '-', $v) : $v,
-        }));
+        $customSlug->getFilterChain()->attach(new CustomSlugFilter($options));
         $customSlug->getValidatorChain()->attach(new Validator\NotEmpty([
             Validator\NotEmpty::STRING,
             Validator\NotEmpty::SPACE,
diff --git a/module/Core/src/ShortUrl/Repository/ShortUrlRepository.php b/module/Core/src/ShortUrl/Repository/ShortUrlRepository.php
index f8e384e2..05800abd 100644
--- a/module/Core/src/ShortUrl/Repository/ShortUrlRepository.php
+++ b/module/Core/src/ShortUrl/Repository/ShortUrlRepository.php
@@ -36,7 +36,7 @@ class ShortUrlRepository extends EntitySpecificationRepository implements ShortU
            ->setParameter('shortCode', $isStrict ? $identifier->shortCode : strtolower($identifier->shortCode))
            ->andWhere($qb->expr()->orX(
                $qb->expr()->isNull('s.domain'),
-               $qb->expr()->eq('d.authority', ':domain')
+               $qb->expr()->eq('d.authority', ':domain'),
            ))
            ->setParameter('domain', $identifier->domain);
 
diff --git a/module/Core/test/ShortUrl/Entity/ShortUrlTest.php b/module/Core/test/ShortUrl/Entity/ShortUrlTest.php
index be1747fd..b69b369a 100644
--- a/module/Core/test/ShortUrl/Entity/ShortUrlTest.php
+++ b/module/Core/test/ShortUrl/Entity/ShortUrlTest.php
@@ -8,6 +8,7 @@ use Cake\Chronos\Chronos;
 use PHPUnit\Framework\TestCase;
 use Shlinkio\Shlink\Core\Exception\ShortCodeCannotBeRegeneratedException;
 use Shlinkio\Shlink\Core\Model\DeviceType;
+use Shlinkio\Shlink\Core\Options\UrlShortenerOptions;
 use Shlinkio\Shlink\Core\ShortUrl\Entity\ShortUrl;
 use Shlinkio\Shlink\Core\ShortUrl\Model\ShortUrlCreation;
 use Shlinkio\Shlink\Core\ShortUrl\Model\ShortUrlEdition;
@@ -144,7 +145,7 @@ class ShortUrlTest extends TestCase
         $allFor = static fn (ShortUrlMode $mode): bool => every($range, static function () use ($mode): bool {
             $shortUrl = ShortUrl::create(ShortUrlCreation::fromRawData(
                 [ShortUrlInputFilter::LONG_URL => 'foo'],
-                $mode,
+                new UrlShortenerOptions(mode: $mode),
             ));
             $shortCode = $shortUrl->getShortCode();
 
diff --git a/module/Core/test/ShortUrl/Model/ShortUrlCreationTest.php b/module/Core/test/ShortUrl/Model/ShortUrlCreationTest.php
index 4d11289c..9582180b 100644
--- a/module/Core/test/ShortUrl/Model/ShortUrlCreationTest.php
+++ b/module/Core/test/ShortUrl/Model/ShortUrlCreationTest.php
@@ -6,10 +6,11 @@ namespace ShlinkioTest\Shlink\Core\ShortUrl\Model;
 
 use Cake\Chronos\Chronos;
 use PHPUnit\Framework\TestCase;
-use Shlinkio\Shlink\Core\Config\EnvVars;
 use Shlinkio\Shlink\Core\Exception\ValidationException;
 use Shlinkio\Shlink\Core\Model\DeviceType;
+use Shlinkio\Shlink\Core\Options\UrlShortenerOptions;
 use Shlinkio\Shlink\Core\ShortUrl\Model\ShortUrlCreation;
+use Shlinkio\Shlink\Core\ShortUrl\Model\ShortUrlMode;
 use Shlinkio\Shlink\Core\ShortUrl\Model\Validation\ShortUrlInputFilter;
 use stdClass;
 
@@ -114,13 +115,13 @@ class ShortUrlCreationTest extends TestCase
         string $customSlug,
         string $expectedSlug,
         bool $multiSegmentEnabled = false,
+        ShortUrlMode $shortUrlMode = ShortUrlMode::STRICT,
     ): void {
         $creation = ShortUrlCreation::fromRawData([
             'validSince' => Chronos::parse('2015-01-01')->toAtomString(),
             'customSlug' => $customSlug,
             'longUrl' => 'longUrl',
-            EnvVars::MULTI_SEGMENT_SLUGS_ENABLED->value => $multiSegmentEnabled,
-        ]);
+        ], new UrlShortenerOptions(multiSegmentSlugsEnabled: $multiSegmentEnabled, mode: $shortUrlMode));
 
         self::assertTrue($creation->hasValidSince());
         self::assertEquals(Chronos::parse('2015-01-01'), $creation->validSince);
@@ -139,16 +140,20 @@ class ShortUrlCreationTest extends TestCase
     {
         yield ['🔥', '🔥'];
         yield ['🦣 🍅', '🦣-🍅'];
+        yield ['🦣 🍅', '🦣-🍅', false, ShortUrlMode::LOOSELY];
         yield ['foobar', 'foobar'];
         yield ['foo bar', 'foo-bar'];
         yield ['foo bar baz', 'foo-bar-baz'];
         yield ['foo bar-baz', 'foo-bar-baz'];
+        yield ['foo BAR-baz', 'foo-bar-baz', false, ShortUrlMode::LOOSELY];
         yield ['foo/bar/baz', 'foo/bar/baz', true];
         yield ['/foo/bar/baz', 'foo/bar/baz', true];
+        yield ['/foo/baR/baZ', 'foo/bar/baz', true, ShortUrlMode::LOOSELY];
         yield ['foo/bar/baz', 'foo-bar-baz'];
         yield ['/foo/bar/baz', '-foo-bar-baz'];
         yield ['wp-admin.php', 'wp-admin.php'];
         yield ['UPPER_lower', 'UPPER_lower'];
+        yield ['UPPER_lower', 'upper_lower', false, ShortUrlMode::LOOSELY];
         yield ['more~url_special.chars', 'more~url_special.chars'];
         yield ['구글', '구글'];
         yield ['グーグル', 'グーグル'];
diff --git a/module/Rest/src/Action/ShortUrl/CreateShortUrlAction.php b/module/Rest/src/Action/ShortUrl/CreateShortUrlAction.php
index c7b6b33f..67509f1b 100644
--- a/module/Rest/src/Action/ShortUrl/CreateShortUrlAction.php
+++ b/module/Rest/src/Action/ShortUrl/CreateShortUrlAction.php
@@ -5,7 +5,6 @@ declare(strict_types=1);
 namespace Shlinkio\Shlink\Rest\Action\ShortUrl;
 
 use Psr\Http\Message\ServerRequestInterface as Request;
-use Shlinkio\Shlink\Core\Config\EnvVars;
 use Shlinkio\Shlink\Core\Exception\ValidationException;
 use Shlinkio\Shlink\Core\ShortUrl\Model\ShortUrlCreation;
 use Shlinkio\Shlink\Core\ShortUrl\Model\Validation\ShortUrlInputFilter;
@@ -23,8 +22,7 @@ class CreateShortUrlAction extends AbstractCreateShortUrlAction
     {
         $payload = (array) $request->getParsedBody();
         $payload[ShortUrlInputFilter::API_KEY] = AuthenticationMiddleware::apiKeyFromRequest($request);
-        $payload[EnvVars::MULTI_SEGMENT_SLUGS_ENABLED->value] = $this->urlShortenerOptions->multiSegmentSlugsEnabled;
 
-        return ShortUrlCreation::fromRawData($payload, $this->urlShortenerOptions->mode);
+        return ShortUrlCreation::fromRawData($payload, $this->urlShortenerOptions);
     }
 }
diff --git a/module/Rest/src/Action/ShortUrl/SingleStepCreateShortUrlAction.php b/module/Rest/src/Action/ShortUrl/SingleStepCreateShortUrlAction.php
index b32e8a5d..d7f5a360 100644
--- a/module/Rest/src/Action/ShortUrl/SingleStepCreateShortUrlAction.php
+++ b/module/Rest/src/Action/ShortUrl/SingleStepCreateShortUrlAction.php
@@ -25,6 +25,6 @@ class SingleStepCreateShortUrlAction extends AbstractCreateShortUrlAction
             ShortUrlInputFilter::API_KEY => $apiKey,
             // This will usually be null, unless this API key enforces one specific domain
             ShortUrlInputFilter::DOMAIN => $request->getAttribute(ShortUrlInputFilter::DOMAIN),
-        ], $this->urlShortenerOptions->mode);
+        ], $this->urlShortenerOptions);
     }
 }