Mp3 to WAV converter in python – 16/07/2025

I have made a mp3 to wav converter in python. It uses the moviepy pip library(pip install moviepy).

It has a progress bar, and allows bulk processing. It also allows the user to set an output folder.

See the python code here:

import tkinter as tk

from tkinter import filedialog, messagebox, ttk

from moviepy.editor import AudioFileClip

import threading

import os

class MP3toWAVConverter(tk.Tk):

def __init__(self):

super().__init__()

self.title("Bulk MP3 to WAV Converter")

self.geometry("450x220")

self.configure(padx=20, pady=20)

self.files = []

self.label = tk.Label(self, text="Select MP3 files to convert:")

self.label.pack(pady=(0,10))

self.select_button = tk.Button(self, text="Select MP3 Files", command=self.select_files)

self.select_button.pack(pady=(0,10))

self.convert_button = tk.Button(self, text="Convert to WAV", command=self.start_conversion, state=tk.DISABLED)

self.convert_button.pack(pady=(0,10))

self.progress = ttk.Progressbar(self, orient='horizontal', length=350, mode='determinate')

self.progress.pack(pady=(10,10))

self.status_label = tk.Label(self, text="", fg="green")

self.status_label.pack()

def select_files(self):

self.files = filedialog.askopenfilenames(

title="Select MP3 files",

filetypes=[("MP3 Files", "*.mp3")])

if self.files:

self.status_label.config(text=f"{len(self.files)} files selected.")

self.convert_button.config(state=tk.NORMAL)

self.progress['value'] = 0

else:

self.status_label.config(text="No files selected.")

self.convert_button.config(state=tk.DISABLED)

self.progress['value'] = 0

def start_conversion(self):

output_folder = filedialog.askdirectory(title="Select output folder")

if not output_folder:

messagebox.showwarning("No folder selected", "Please select an output folder.")

return

self.convert_button.config(state=tk.DISABLED)

self.select_button.config(state=tk.DISABLED)

self.status_label.config(text="Starting conversion...")

threading.Thread(target=self.convert_files, args=(output_folder,), daemon=True).start()

def convert_files(self, output_folder):

total_files = len(self.files)

success_count = 0

error_files = []

for idx, file in enumerate(self.files, start=1):

try:

audio_clip = AudioFileClip(file)

filename = os.path.splitext(os.path.basename(file))[0]

output_path = os.path.join(output_folder, filename + ".wav")

audio_clip.write_audiofile(output_path, logger=None)

audio_clip.close()

success_count += 1

except Exception as e:

error_files.append(file)

# Update progress bar

progress_percent = (idx / total_files) * 100

self.progress.after(0, lambda: self.progress.config(value=progress_percent))

self.status_label.after(0, lambda: self.status_label.config(text=f"Converting {idx} of {total_files} files..."))

msg = f"Converted {success_count} files successfully."

if error_files:

msg += f"\nFailed to convert {len(error_files)} files."

self.status_label.after(0, self.status_label.config, {"text": "Conversion done."})

messagebox.showinfo("Conversion Complete", msg)

self.convert_button.config(state=tk.NORMAL)

self.select_button.config(state=tk.NORMAL)

if __name__ == "__main__":

app = MP3toWAVConverter()

app.mainloop()