diff --git a/src/app/components/creator/room-creator-page/room-creator-page.component.html b/src/app/components/creator/room-creator-page/room-creator-page.component.html
index 0773fd256a2ef8d79cecf839a86c682c15f91a2b..ebd2720687ab3b94f06e81526c737177f1af7a2b 100644
--- a/src/app/components/creator/room-creator-page/room-creator-page.component.html
+++ b/src/app/components/creator/room-creator-page/room-creator-page.component.html
@@ -103,7 +103,7 @@
             <button id="gavel-button"
                     mat-icon-button
                     [disableRipple]="true"
-                    routerLink="/moderator/room/{{ room.shortId }}/moderator/comments"
+                    routerLink="/moderator/room/{{ encodedShortId }}/moderator/comments"
                     aria-labelledby="gavel">
               <mat-icon matBadge="{{moderatorCommentCounter > 0 ? moderatorCommentCounter : null}}"
                         class="main-icon"
@@ -121,7 +121,7 @@
           <button id="question_answer-button2"
                   mat-icon-button
                   [disableRipple]="true"
-                  routerLink="/creator/room/{{ room.shortId }}/comments"
+                  routerLink="/creator/room/{{ encodedShortId }}/comments"
                   aria-labelledby="question_answer">
             <mat-icon matBadge="{{commentCounter > 0 ? commentCounter : null}}"
                       class="main-icon">question_answer
diff --git a/src/app/components/creator/room-creator-page/room-creator-page.component.ts b/src/app/components/creator/room-creator-page/room-creator-page.component.ts
index f47f4fab4d464d0bc4861522a7ab4564833e7817..c4de292220c9b2ea22b7bf4f25543a5cca0d1a51 100644
--- a/src/app/components/creator/room-creator-page/room-creator-page.component.ts
+++ b/src/app/components/creator/room-creator-page/room-creator-page.component.ts
@@ -29,6 +29,7 @@ import { KeyboardKey } from '../../../utils/keyboard/keys';
 })
 export class RoomCreatorPageComponent extends RoomPageComponent implements OnInit, OnDestroy, AfterContentInit {
   room: Room;
+  encodedShortId: string;
   updRoom: Room;
   commentThreshold: number;
   updCommentThreshold: number;
@@ -62,9 +63,13 @@ export class RoomCreatorPageComponent extends RoomPageComponent implements OnIni
   ngOnInit() {
     window.scroll(0, 0);
     this.translateService.use(localStorage.getItem('currentLang'));
-
     this.route.params.subscribe(params => {
       this.initializeRoom(params['shortId']);
+      this.encodedShortId = encodeURIComponent(params['shortId'])
+        .replace('\~', '%7E')
+        .replace('\.', '%2E')
+        .replace('\_', '%5F')
+        .replace('\-', '%2D');
     });
     this.listenerFn = this._r.listen(document, 'keyup', (event) => {
       const lang: string = this.translateService.currentLang;
@@ -241,7 +246,7 @@ export class RoomCreatorPageComponent extends RoomPageComponent implements OnIni
     selBox.style.left = '0';
     selBox.style.top = '0';
     selBox.style.opacity = '0';
-    selBox.value = `${this.urlToCopy}${this.room.shortId}`;
+    selBox.value = `${this.urlToCopy}${this.encodedShortId}`;
     document.body.appendChild(selBox);
     selBox.focus();
     selBox.select();
diff --git a/src/app/components/shared/_dialogs/room-create/room-create.component.html b/src/app/components/shared/_dialogs/room-create/room-create.component.html
index e98a114ee00ec1f297fb1efd48f93cb8ec843005..83c40046ab6f0039ab6cb3eaae34be85dae7d642 100644
--- a/src/app/components/shared/_dialogs/room-create/room-create.component.html
+++ b/src/app/components/shared/_dialogs/room-create/room-create.component.html
@@ -42,6 +42,9 @@
       <mat-hint align="start"
                 class="error"
                 *ngIf="shortIdAlreadyUsed"><strong>{{ 'home-page.invalid-shortid' | translate }}</strong></mat-hint>
+      <mat-hint align="start"
+                class="error"
+                *ngIf="shortIdCharInvalid"><strong>invalid</strong></mat-hint>
     </mat-form-field>
   </div>
 </form>
diff --git a/src/app/components/shared/_dialogs/room-create/room-create.component.ts b/src/app/components/shared/_dialogs/room-create/room-create.component.ts
index bb3dcbb0bf28c84bdb536e628aff15ea4a3b021f..f3e05fef0a57514f29a81722d688354a0f37843f 100644
--- a/src/app/components/shared/_dialogs/room-create/room-create.component.ts
+++ b/src/app/components/shared/_dialogs/room-create/room-create.component.ts
@@ -21,6 +21,7 @@ export class RoomCreateComponent implements OnInit {
   customShortIdName: string;
   emptyInputs = false;
   shortIdAlreadyUsed = false;
+  shortIdCharInvalid = false;
   room: Room;
   roomId: string;
   user: User;
@@ -68,6 +69,12 @@ export class RoomCreateComponent implements OnInit {
     newRoom.abbreviation = '00000000';
     newRoom.description = '';
     if (this.hasCustomShortId && this.customShortIdName && this.customShortIdName.length > 0) {
+      if (!new RegExp('[a-z,A-Z,\s,\-,\.,\_,\~]+').test(this.customShortIdName)) {
+        this.shortIdCharInvalid = true;
+        return;
+      } else {
+        this.shortIdCharInvalid = false;
+      }
       newRoom.shortId = this.customShortIdName;
     } else {
       newRoom.shortId = undefined;
@@ -81,9 +88,17 @@ export class RoomCreateComponent implements OnInit {
       this.translateService.get('home-page.created-1').subscribe(msg => { msg1 = msg; });
       this.translateService.get('home-page.created-2').subscribe(msg => { msg2 = msg; });
       this.notification.show(msg1 + longRoomName + msg2);
-      this.authenticationService.setAccess(encodeURIComponent(this.room.shortId), UserRole.CREATOR);
+      this.authenticationService.setAccess(encodeURIComponent(this.customShortIdName)
+      .replace('\~', '%7E')
+      .replace('\.', '%2E')
+      .replace('\_', '%5F')
+      .replace('\-', '%2D'), UserRole.CREATOR);
       this.authenticationService.assignRole(UserRole.CREATOR);
-      this.router.navigate(['/creator/room/' + encodeURIComponent(this.room.shortId) ]);
+      this.router.navigate(['/creator/room/' + encodeURIComponent(this.customShortIdName)
+      .replace('\~', '%7E')
+      .replace('\.', '%2E')
+      .replace('\_', '%5F')
+      .replace('\-', '%2D') ]);
       this.closeDialog();
     });
   }