diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e6d450b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+.idea
+test*.py
+test.*
+*.log
\ No newline at end of file
diff --git a/gui.py b/gui.py
new file mode 100644
index 0000000..854806a
--- /dev/null
+++ b/gui.py
@@ -0,0 +1,374 @@
+import customtkinter as ctk
+import threading
+import sys
+from io import StringIO
+from tkinter import filedialog, messagebox
+from src.EpubHandler import EpubHandler
+from src.WebScrapper import WebScrapper
+
+
+class LogRedirector:
+    """Leitet print() Ausgaben in ein Textfeld um"""
+    def __init__(self, text_widget):
+        self.text_widget = text_widget
+        self.buffer = StringIO()
+
+    def write(self, message):
+        self.text_widget.configure(state="normal")
+        self.text_widget.insert("end", message)
+        self.text_widget.see("end")
+        self.text_widget.configure(state="disabled")
+        self.text_widget.update_idletasks()
+
+    def flush(self):
+        pass
+
+
+class App(ctk.CTk):
+    def __init__(self):
+        super().__init__()
+
+        self.title("J-Novel Scrapper & Translator")
+        self.geometry("900x700")
+
+        # Theme
+        ctk.set_appearance_mode("dark")
+        ctk.set_default_color_theme("blue")
+
+        # Tabview
+        self.tabview = ctk.CTkTabview(self, width=850, height=650)
+        self.tabview.pack(padx=20, pady=20, fill="both", expand=True)
+
+        # Tabs erstellen
+        self.tabview.add("WebScrapper")
+        self.tabview.add("EpubHandler")
+
+        # Tab-Inhalte aufbauen
+        self.setup_webscrapper_tab()
+        self.setup_epubhandler_tab()
+
+    # ==================== WebScrapper Tab ====================
+    def setup_webscrapper_tab(self):
+        tab = self.tabview.tab("WebScrapper")
+
+        # Frame für Input-Felder
+        input_frame = ctk.CTkFrame(tab)
+        input_frame.pack(padx=10, pady=10, fill="x")
+
+        # Base URL
+        ctk.CTkLabel(input_frame, text="Base URL:").grid(row=0, column=0, padx=5, pady=5, sticky="w")
+        self.ws_base_url = ctk.CTkEntry(input_frame, width=400, placeholder_text="https://example.com/novel/")
+        self.ws_base_url.grid(row=0, column=1, padx=5, pady=5, sticky="ew")
+
+        # HTML Folder Path
+        ctk.CTkLabel(input_frame, text="HTML Ordner:").grid(row=1, column=0, padx=5, pady=5, sticky="w")
+        self.ws_html_path = ctk.CTkEntry(input_frame, width=300, placeholder_text=r"E:\temp\WN\Novel\HTML")
+        self.ws_html_path.grid(row=1, column=1, padx=5, pady=5, sticky="ew")
+        ctk.CTkButton(input_frame, text="...", width=50, command=self.browse_ws_html_folder).grid(row=1, column=2, padx=5, pady=5)
+
+        # URI Format
+        ctk.CTkLabel(input_frame, text="URI Format:").grid(row=2, column=0, padx=5, pady=5, sticky="w")
+        self.ws_uri_format = ctk.CTkEntry(input_frame, width=400, placeholder_text="chapter_{}.html oder {}/")
+        self.ws_uri_format.grid(row=2, column=1, padx=5, pady=5, sticky="ew")
+
+        # From/To Chapter
+        ctk.CTkLabel(input_frame, text="Von Kapitel:").grid(row=3, column=0, padx=5, pady=5, sticky="w")
+        self.ws_from_chapter = ctk.CTkEntry(input_frame, width=100, placeholder_text="1")
+        self.ws_from_chapter.grid(row=3, column=1, padx=5, pady=5, sticky="w")
+
+        ctk.CTkLabel(input_frame, text="Bis Kapitel:").grid(row=4, column=0, padx=5, pady=5, sticky="w")
+        self.ws_to_chapter = ctk.CTkEntry(input_frame, width=100, placeholder_text="100")
+        self.ws_to_chapter.grid(row=4, column=1, padx=5, pady=5, sticky="w")
+
+        # Sleep Time
+        ctk.CTkLabel(input_frame, text="Sleep Time (s):").grid(row=5, column=0, padx=5, pady=5, sticky="w")
+        self.ws_sleep_time = ctk.CTkEntry(input_frame, width=100, placeholder_text="0")
+        self.ws_sleep_time.grid(row=5, column=1, padx=5, pady=5, sticky="w")
+
+        # Language
+        ctk.CTkLabel(input_frame, text="Sprache:").grid(row=6, column=0, padx=5, pady=5, sticky="w")
+        self.ws_language = ctk.CTkComboBox(input_frame, values=["en", "jp", "de"], width=100)
+        self.ws_language.set("en")
+        self.ws_language.grid(row=6, column=1, padx=5, pady=5, sticky="w")
+
+        input_frame.columnconfigure(1, weight=1)
+
+        # Start Button
+        self.ws_start_btn = ctk.CTkButton(tab, text="Scraping starten", command=self.start_webscrapper, height=40)
+        self.ws_start_btn.pack(padx=10, pady=10, fill="x")
+
+        # Progress Bar
+        self.ws_progress = ctk.CTkProgressBar(tab, width=400)
+        self.ws_progress.pack(padx=10, pady=5, fill="x")
+        self.ws_progress.set(0)
+
+        # Log Textfeld (readonly)
+        ctk.CTkLabel(tab, text="Logs:", anchor="w").pack(padx=10, pady=(10, 0), fill="x")
+        self.ws_log = ctk.CTkTextbox(tab, height=200, state="disabled")
+        self.ws_log.pack(padx=10, pady=5, fill="both", expand=True)
+
+    def browse_ws_html_folder(self):
+        folder = filedialog.askdirectory()
+        if folder:
+            self.ws_html_path.delete(0, "end")
+            self.ws_html_path.insert(0, folder)
+
+    def start_webscrapper(self):
+        # Validierung
+        if not self.ws_base_url.get() or not self.ws_html_path.get() or not self.ws_uri_format.get():
+            messagebox.showerror("Fehler", "Bitte alle Pflichtfelder ausfüllen!")
+            return
+
+        try:
+            from_chapter = int(self.ws_from_chapter.get() or 1)
+            to_chapter = int(self.ws_to_chapter.get() or 1)
+            sleep_time = float(self.ws_sleep_time.get() or 0)
+        except ValueError:
+            messagebox.showerror("Fehler", "Kapitel und Sleep Time müssen Zahlen sein!")
+            return
+
+        # Button deaktivieren
+        self.ws_start_btn.configure(state="disabled", text="Läuft...")
+        self.ws_progress.set(0)
+        self.ws_log.configure(state="normal")
+        self.ws_log.delete("1.0", "end")
+        self.ws_log.configure(state="disabled")
+
+        # Thread starten
+        thread = threading.Thread(
+            target=self.run_webscrapper,
+            args=(self.ws_base_url.get(), self.ws_html_path.get(), self.ws_language.get(),
+                  self.ws_uri_format.get(), from_chapter, to_chapter, sleep_time),
+            daemon=True
+        )
+        thread.start()
+
+    def run_webscrapper(self, base_url, html_path, language, uri_format, from_ch, to_ch, sleep_time):
+        # Log umleiten
+        old_stdout = sys.stdout
+        sys.stdout = LogRedirector(self.ws_log)
+
+        try:
+            scrapper = WebScrapper(base_url, html_path, language)
+
+            total = to_ch - from_ch + 1
+            for i, chapter in enumerate(range(from_ch, to_ch + 1)):
+                # Progress aktualisieren
+                progress = (i + 1) / total
+                self.ws_progress.set(progress)
+
+                # Einzelnes Kapitel scrapen
+                scrapper.getHtml(uri_format, chapter, chapter, sleep_time)
+
+            print("\n✅ Scraping erfolgreich abgeschlossen!")
+            messagebox.showinfo("Erfolg", "Scraping abgeschlossen!")
+
+        except Exception as e:
+            print(f"\n❌ Fehler: {str(e)}")
+            messagebox.showerror("Fehler", f"Ein Fehler ist aufgetreten:\n{str(e)}")
+
+        finally:
+            sys.stdout = old_stdout
+            self.ws_start_btn.configure(state="normal", text="Scraping starten")
+            self.ws_progress.set(1.0)
+
+    # ==================== EpubHandler Tab ====================
+    def setup_epubhandler_tab(self):
+        tab = self.tabview.tab("EpubHandler")
+
+        # Frame für Input-Felder
+        input_frame = ctk.CTkFrame(tab)
+        input_frame.pack(padx=10, pady=10, fill="x")
+
+        # HTML Folder Path
+        ctk.CTkLabel(input_frame, text="HTML Ordner:").grid(row=0, column=0, padx=5, pady=5, sticky="w")
+        self.eh_html_path = ctk.CTkEntry(input_frame, width=300, placeholder_text=r"E:\temp\WN\Novel\HTML")
+        self.eh_html_path.grid(row=0, column=1, padx=5, pady=5, sticky="ew")
+        ctk.CTkButton(input_frame, text="...", width=50, command=self.browse_eh_html_folder).grid(row=0, column=2, padx=5, pady=5)
+
+        # EPUB Folder Path
+        ctk.CTkLabel(input_frame, text="EPUB Ordner:").grid(row=1, column=0, padx=5, pady=5, sticky="w")
+        self.eh_epub_path = ctk.CTkEntry(input_frame, width=300, placeholder_text=r"E:\temp\WN\Novel\EPUB")
+        self.eh_epub_path.grid(row=1, column=1, padx=5, pady=5, sticky="ew")
+        ctk.CTkButton(input_frame, text="...", width=50, command=self.browse_eh_epub_folder).grid(row=1, column=2, padx=5, pady=5)
+
+        # Cover Image Path
+        ctk.CTkLabel(input_frame, text="Cover Bild (optional):").grid(row=2, column=0, padx=5, pady=5, sticky="w")
+        self.eh_cover_path = ctk.CTkEntry(input_frame, width=300, placeholder_text="cover.jpg (optional)")
+        self.eh_cover_path.grid(row=2, column=1, padx=5, pady=5, sticky="ew")
+        ctk.CTkButton(input_frame, text="...", width=50, command=self.browse_eh_cover_image).grid(row=2, column=2, padx=5, pady=5)
+
+        # Language
+        ctk.CTkLabel(input_frame, text="Sprache:").grid(row=3, column=0, padx=5, pady=5, sticky="w")
+        self.eh_language = ctk.CTkComboBox(input_frame, values=["en", "jp", "de"], width=100)
+        self.eh_language.set("en")
+        self.eh_language.grid(row=3, column=1, padx=5, pady=5, sticky="w")
+
+        input_frame.columnconfigure(1, weight=1)
+
+        # Buttons Frame
+        button_frame = ctk.CTkFrame(tab)
+        button_frame.pack(padx=10, pady=10, fill="x")
+
+        # HTML zu EPUB Button
+        self.eh_html_to_epub_btn = ctk.CTkButton(
+            button_frame,
+            text="HTML → EPUB konvertieren",
+            command=self.start_html_to_epub,
+            height=40
+        )
+        self.eh_html_to_epub_btn.pack(side="left", padx=5, fill="x", expand=True)
+
+        # EPUB zu HTML Button
+        self.eh_epub_to_html_btn = ctk.CTkButton(
+            button_frame,
+            text="EPUB → HTML konvertieren",
+            command=self.start_epub_to_html,
+            height=40,
+            fg_color="gray40"
+        )
+        self.eh_epub_to_html_btn.pack(side="left", padx=5, fill="x", expand=True)
+
+        # Progress Bar
+        self.eh_progress = ctk.CTkProgressBar(tab, width=400)
+        self.eh_progress.pack(padx=10, pady=5, fill="x")
+        self.eh_progress.set(0)
+
+        # Log Textfeld (readonly)
+        ctk.CTkLabel(tab, text="Logs:", anchor="w").pack(padx=10, pady=(10, 0), fill="x")
+        self.eh_log = ctk.CTkTextbox(tab, height=200, state="disabled")
+        self.eh_log.pack(padx=10, pady=5, fill="both", expand=True)
+
+    def browse_eh_html_folder(self):
+        folder = filedialog.askdirectory()
+        if folder:
+            self.eh_html_path.delete(0, "end")
+            self.eh_html_path.insert(0, folder)
+
+    def browse_eh_epub_folder(self):
+        folder = filedialog.askdirectory()
+        if folder:
+            self.eh_epub_path.delete(0, "end")
+            self.eh_epub_path.insert(0, folder)
+
+    def browse_eh_cover_image(self):
+        file = filedialog.askopenfilename(
+            title="Cover Bild auswählen",
+            filetypes=[("Bilddateien", "*.jpg *.jpeg *.png"), ("Alle Dateien", "*.*")]
+        )
+        if file:
+            self.eh_cover_path.delete(0, "end")
+            self.eh_cover_path.insert(0, file)
+
+    def start_html_to_epub(self):
+        # Validierung
+        if not self.eh_html_path.get() or not self.eh_epub_path.get():
+            messagebox.showerror("Fehler", "Bitte HTML- und EPUB-Ordner angeben!")
+            return
+
+        # Buttons deaktivieren
+        self.eh_html_to_epub_btn.configure(state="disabled", text="Läuft...")
+        self.eh_epub_to_html_btn.configure(state="disabled")
+        self.eh_progress.set(0)
+        self.eh_log.configure(state="normal")
+        self.eh_log.delete("1.0", "end")
+        self.eh_log.configure(state="disabled")
+
+        # Thread starten
+        thread = threading.Thread(
+            target=self.run_html_to_epub,
+            args=(self.eh_html_path.get(), self.eh_epub_path.get(),
+                  self.eh_language.get(), self.eh_cover_path.get() or None),
+            daemon=True
+        )
+        thread.start()
+
+    def run_html_to_epub(self, html_path, epub_path, language, cover_path):
+        # Log umleiten
+        old_stdout = sys.stdout
+        sys.stdout = LogRedirector(self.eh_log)
+
+        try:
+            self.eh_progress.set(0.3)
+            print("Starte HTML → EPUB Konvertierung...")
+
+            epub_handler = EpubHandler(html_path, epub_path)
+            self.eh_progress.set(0.5)
+
+            epub_handler.convertHtmlToEpub(language, cover_path)
+            self.eh_progress.set(1.0)
+
+            print("\n✅ EPUB erfolgreich erstellt!")
+            messagebox.showinfo("Erfolg", "EPUB wurde erfolgreich erstellt!")
+
+        except Exception as e:
+            print(f"\n❌ Fehler: {str(e)}")
+            messagebox.showerror("Fehler", f"Ein Fehler ist aufgetreten:\n{str(e)}")
+
+        finally:
+            sys.stdout = old_stdout
+            self.eh_html_to_epub_btn.configure(state="normal", text="HTML → EPUB konvertieren")
+            self.eh_epub_to_html_btn.configure(state="normal")
+
+    def start_epub_to_html(self):
+        # Validierung
+        if not self.eh_epub_path.get() or not self.eh_html_path.get():
+            messagebox.showerror("Fehler", "Bitte HTML- und EPUB-Ordner angeben!")
+            return
+
+        # EPUB-Datei auswählen
+        epub_file = filedialog.askopenfilename(
+            title="EPUB-Datei auswählen",
+            initialdir=self.eh_epub_path.get(),
+            filetypes=[("EPUB Dateien", "*.epub"), ("Alle Dateien", "*.*")]
+        )
+        if not epub_file:
+            return
+
+        # Buttons deaktivieren
+        self.eh_html_to_epub_btn.configure(state="disabled")
+        self.eh_epub_to_html_btn.configure(state="disabled", text="Läuft...")
+        self.eh_progress.set(0)
+        self.eh_log.configure(state="normal")
+        self.eh_log.delete("1.0", "end")
+        self.eh_log.configure(state="disabled")
+
+        # Thread starten
+        thread = threading.Thread(
+            target=self.run_epub_to_html,
+            args=(self.eh_html_path.get(), self.eh_epub_path.get(), epub_file),
+            daemon=True
+        )
+        thread.start()
+
+    def run_epub_to_html(self, html_path, epub_path, epub_file):
+        # Log umleiten
+        old_stdout = sys.stdout
+        sys.stdout = LogRedirector(self.eh_log)
+
+        try:
+            self.eh_progress.set(0.3)
+            print("Starte EPUB → HTML Konvertierung...")
+
+            epub_handler = EpubHandler(html_path, epub_path)
+            self.eh_progress.set(0.5)
+
+            epub_handler.epub_to_html(epub_file)
+            self.eh_progress.set(1.0)
+
+            print("\n✅ HTML-Dateien erfolgreich erstellt!")
+            messagebox.showinfo("Erfolg", "HTML-Dateien wurden erfolgreich erstellt!")
+
+        except Exception as e:
+            print(f"\n❌ Fehler: {str(e)}")
+            messagebox.showerror("Fehler", f"Ein Fehler ist aufgetreten:\n{str(e)}")
+
+        finally:
+            sys.stdout = old_stdout
+            self.eh_html_to_epub_btn.configure(state="normal")
+            self.eh_epub_to_html_btn.configure(state="normal", text="EPUB → HTML konvertieren")
+
+
+if __name__ == "__main__":
+    app = App()
+    app.mainloop()
diff --git a/main.py b/main.py
index 6a2b743..a25b3d5 100644
--- a/main.py
+++ b/main.py
@@ -3,9 +3,13 @@ import random
 from src.EpubHandler import EpubHandler
 from src.Translator import Translator
 from src.WebScrapper import WebScrapper
+from gui import App
 
 # Press the green button in the gutter to run the script.
 if __name__ == '__main__':
+    # GUI starten
+
+    # Alte Beispiele (auskommentiert):
     # scrapper = WebScrapper("https://www.fanmtl.com/novel/", r"E:\temp\WN\Game of the World Tree\HTML", "en")
     # scrapper.getHtml("game-of-the-world-tree_{}.html", 1, 987)
 
@@ -17,9 +21,9 @@ if __name__ == '__main__':
     #scrapper = WebScrapper("https://ncode.syosetu.com/n0806fu/", r"E:\temp\WN\Golden Experience\HTML", "jp")
     #scrapper.getHtml("{}/", 334, 620) # 612
 
-    # scrapper = WebScrapper("https://fenrirealm.com/series/dorothys-forbidden-grimoire/", r"E:\temp\WN\Dorothy’s Forbidden Grimoire\HTML", "en")
-    # scrapper.getHtml("{}", 377, 828, 2)
-    epubHandler = EpubHandler(r"E:\temp\WN\Dorothy’s Forbidden Grimoire\HTML", r"E:\temp\WN\Dorothy’s Forbidden Grimoire\EPUB")
+    # scrapper = WebScrapper("https://fenrirealm.com/series/dorothys-forbidden-grimoire/", r"E:\temp\WN\Dorothy's Forbidden Grimoire\HTML", "en")
+    # scrapper.getHtml("{}", 1, 828, 2)
+    epubHandler = EpubHandler(r"E:\temp\WN\Dorothy's Forbidden Grimoire\HTML", r"E:\temp\WN\Dorothy's Forbidden Grimoire\EPUB")
     epubHandler.convertHtmlToEpub("en", r"C:\Users\JohannesBOZZ\Downloads\6e1de333d6af7aaa3fdf3ffa66ac6f55.png")
 
     # epubHandler = EpubHandler(r"E:\temp\WN\Golden Experience\501-609", r"E:\temp\WN\Golden Experience\epub")
diff --git a/requierments.txt b/requierments.txt
index f74cd03..913ff32 100644
--- a/requierments.txt
+++ b/requierments.txt
@@ -10,3 +10,4 @@ torch
 tensorflow
 flax
 protobuf==3.20.*
+customtkinter
diff --git a/src/WebScrapper.py b/src/WebScrapper.py
index 857831d..c1e827b 100644
--- a/src/WebScrapper.py
+++ b/src/WebScrapper.py
@@ -13,12 +13,45 @@ from src.functions import writeToFile, makeDir, writeToJsonFile
 
 
 class WebScrapper:
+
     def __init__(self, baseLink:str, htmlFolderPath:str, currentLanguage:str):
         self.baseLink = baseLink
         self.htmlFolderPath = htmlFolderPath
         self.currentLanguage = currentLanguage
         makeDir(self.htmlFolderPath)
 
+
+    @staticmethod
+    def _sanitizeFilename(filename: str) -> str:
+        """
+        Entfernt ungültige Zeichen für Windows und Linux Dateinamen.
+        Windows verboten: < > : " / \ | ? *
+        Linux verboten: / und \0 (null byte)
+        Zusätzlich: Leerzeichen am Anfang/Ende entfernen, mehrfache Leerzeichen reduzieren
+        """
+        # Ungültige Zeichen für Windows und Linux entfernen
+        filename = re.sub(r'[<>:"/\\|?*\x00-\x1f]', '', filename)
+
+        # Mehrfache Leerzeichen durch einzelnes ersetzen
+        filename = re.sub(r'\s+', ' ', filename)
+
+        # Leerzeichen am Anfang/Ende entfernen
+        filename = filename.strip()
+
+        # Punkte am Ende entfernen (Windows-Problem)
+        filename = filename.rstrip('.')
+
+        # Falls Dateiname leer ist, Fallback verwenden
+        if not filename:
+            filename = "chapter"
+
+        # Dateiname auf maximal 255 Zeichen begrenzen (ohne Erweiterung)
+        if len(filename) > 200:
+            filename = filename[:200]
+
+        return filename
+
+
     def getHtml(self, uriWithFormat:str, fromChapter:int, toChapter:int, sleepTime:float=0):
         """
         uriWithFormat: inserts the current chapter number into the {} brackets
@@ -53,10 +86,16 @@ class WebScrapper:
             chapterTitle = self._addChapterTitle(soup, chapterContent, chapterNumber, infoDict)
             infoDict["chapterTitle"] = chapterTitle
 
-            filePath = os.path.join(self.htmlFolderPath, f"{chapterTitle}.html")
+            # Dateinamen bereinigen
+            safe_filename = self._sanitizeFilename(chapterTitle)
+            if safe_filename != chapterTitle:
+                print(f"  → Dateiname bereinigt: '{chapterTitle}' → '{safe_filename}'")
+
+            filePath = os.path.join(self.htmlFolderPath, f"{safe_filename}.html")
             writeToFile("wb", filePath, chapterContent.renderContents("utf-8", True, 4))
             writeToJsonFile(filePath.replace(".html", ".json"), infoDict)
 
+
     def _getChapterContent(self, soup:BeautifulSoup):
         chapterContent = None
 
@@ -72,6 +111,7 @@ class WebScrapper:
 
         return chapterContent
 
+
     def _removeUnwantedThinsFromHtml(self, content:BeautifulSoup|NavigableString):
         if not content:
             return
@@ -90,17 +130,16 @@ class WebScrapper:
     def _addChapterTitle(self, soup:BeautifulSoup, content:BeautifulSoup|NavigableString, chapterNumber, infoDict:dict):
         chapterTitle = f"Chapter {chapterNumber}"
         if "fanmtl.com" in self.baseLink:
-            infoDict["seriesTitle"] = re.sub("\(.*?\)|[<>|\?:\*\"\\/]", "", soup.select("div.titles h1 a")[0].text)
-            chapterTitle = re.sub("\(.*?\)|[<>|\?:\*\"\\/]", "", soup.select("div.titles h2")[0].text)
-            infoDict["chapterTitle"] =chapterTitle
+            infoDict["seriesTitle"] = soup.select("div.titles h1 a")[0].text.strip()
+            chapterTitle = soup.select("div.titles h2")[0].text.strip()
+            infoDict["chapterTitle"] = chapterTitle
             infoDict["author"] = ""
         elif "syosetu.com" in self.baseLink:
             chapterTitle = soup.select_one("h1.p-novel__title.p-novel__title--rensai").get_text(strip=True).strip()
-            # = soup.select("h1.p-novel__title font font")
             infoDict["seriesTitle"] = re.sub("\[.*?\]", "", soup.select(".c-announce > a:first-of-type")[0].text).strip()
             infoDict["author"] = soup.select(".c-announce > a:nth-of-type(2)")[0].text.strip()
         elif "fenrirealm.com" in self.baseLink:
-            chapterTitle = soup.select_one(".chapter-view > div > h2").get_text(strip=True).split(":")[-1].strip()
+            chapterTitle = soup.select_one(".chapter-view > div > h2").get_text(strip=True)
             infoDict["seriesTitle"] = soup.select_one("title").get_text(strip=True).split(" - ")[0].strip()
             infoDict["author"] = "unknown"