diff --git a/core/lib/presentation/utils/html_transformer/sanitize_url.dart b/core/lib/presentation/utils/html_transformer/sanitize_url.dart
new file mode 100644
index 000000000..3c835dc5e
--- /dev/null
+++ b/core/lib/presentation/utils/html_transformer/sanitize_url.dart
@@ -0,0 +1,30 @@
+import 'package:core/utils/app_logger.dart';
+import 'package:get/get.dart';
+
+class SanitizeUrl {
+
+  final bool defaultToHttps;
+
+  SanitizeUrl({this.defaultToHttps = true});
+
+  final _protocolIdentifierRegex = RegExp(
+    r'^(https?://)',
+    caseSensitive: false,
+  );
+
+  String process(String inputText) {
+    var originalUrl = inputText;
+
+    originalUrl = Uri.decodeFull(originalUrl);
+
+    if (GetUtils.isURL(originalUrl)) {
+      if (!originalUrl.startsWith(_protocolIdentifierRegex)) {
+        originalUrl = (defaultToHttps ? "https://" : "http://") + originalUrl;
+      }
+    } else {
+      originalUrl = '';
+    }
+    log('SanitizeUrl::process:originalUrl = $originalUrl');
+    return originalUrl;
+  }
+}
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diff --git a/core/test/sanitize_url_test.dart b/core/test/sanitize_url_test.dart
new file mode 100644
index 000000000..f4df853fa
--- /dev/null
+++ b/core/test/sanitize_url_test.dart
@@ -0,0 +1,112 @@
+import 'package:core/presentation/utils/html_transformer/sanitize_url.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  group('SanitizeUrl test', () {
+    final sanitizeUrl = SanitizeUrl();
+
+    test('SHOULD return valid url WHEN input text is valid url start with https', () {
+      final validUrl = sanitizeUrl.process('https://linagora.com');
+      expect(
+        validUrl,
+        equals('https://linagora.com')
+      );
+    });
+
+    test('SHOULD return valid url WHEN input text is valid url start with http', () {
+      final validUrl = sanitizeUrl.process('http://linagora.com');
+      expect(
+        validUrl,
+        equals('http://linagora.com')
+      );
+    });
+
+    test('SHOULD return valid url WHEN input text start with www', () {
+      final validUrl = sanitizeUrl.process('www.linagora.com');
+      expect(
+        validUrl,
+        equals('https://www.linagora.com')
+      );
+    });
+
+    test('SHOULD return valid url WHEN input text start with valid domain', () {
+      final validUrl = sanitizeUrl.process('linagora.com');
+      expect(
+        validUrl,
+        equals('https://linagora.com')
+      );
+    });
+
+    test('SHOULD return empty string text WHEN input text is empty', () {
+      final validUrl = sanitizeUrl.process('');
+      expect(
+        validUrl,
+        equals('')
+      );
+    });
+
+    test('SHOULD return empty string text WHEN input text not contain url', () {
+      final validUrl = sanitizeUrl.process('Linagora Company');
+      expect(
+        validUrl,
+        equals('')
+      );
+    });
+
+    test('SHOULD return empty string text WHEN input text is email address', () {
+      final validUrl = sanitizeUrl.process('example@linagora.com');
+      expect(
+        validUrl,
+        equals('')
+      );
+    });
+
+    test('SHOULD return empty string text WHEN input text is mailto link', () {
+      final validUrl = sanitizeUrl.process('mailto:example@linagora.com');
+      expect(
+        validUrl,
+        equals('')
+      );
+    });
+
+    test('SHOULD return empty string text WHEN input text is invalid url', () {
+      final validUrl = sanitizeUrl.process('linagora mail.com');
+      expect(
+        validUrl,
+        equals('')
+      );
+    });
+
+    test('SHOULD return empty string WHEN input text start with //', () {
+      final validUrl = sanitizeUrl.process('//linagora.com');
+      expect(
+        validUrl,
+        equals('')
+      );
+    });
+
+    test('SHOULD return empty string WHEN input text start with /', () {
+      final validUrl = sanitizeUrl.process('/linagora.com');
+      expect(
+        validUrl,
+        equals('')
+      );
+    });
+
+    test('SHOULD return valid url WHEN input text is url encoded start with https', () {
+      final validUrl = sanitizeUrl.process('https%3A%2F%2Flinagora.com');
+      expect(
+        validUrl,
+        equals('https://linagora.com')
+      );
+    });
+
+    test('SHOULD return valid url WHEN input text is url encoded start with http', () {
+      final validUrl = sanitizeUrl.process('http%3A%2F%2Flinagora.com');
+      expect(
+        validUrl,
+        equals('http://linagora.com')
+      );
+    });
+  });
+}
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