Free Bulk Audio Converter
Turn a whole folder of audio files into MP3 or WAV, or save the soundtrack of videos as MP3. Even out the volume across tracks and cut silence from the start and end. Your own browser does the converting, so nothing is uploaded.
Quick human check, then the tool unlocks:
Drop audio or video files, or whole folders, here
MP3, WAV, M4A, AAC, FLAC, OGG, OPUS, AIFF, and MP4/WebM/MOV videos.
How to convert audio in bulk
- Drop in your files, or press Choose a folder. Videos work too: only the sound is kept.
- Pick MP3 or WAV and the quality. 192 kbps is near-perfect for music; 96 kbps mono is plenty for speech and podcasts.
- Press Convert, listen to the first file, and download them one by one or as a ZIP that keeps your folder layout.
Volume options
- Even out loudness sets every file to the same average loudness, so a playlist or a set of voice recordings doesn't jump between quiet and loud. Peaks are kept below distortion.
- As loud as possible raises each file until its loudest moment is just under the limit.
Which formats open depends on your browser: Chrome, Edge and Firefox read MP3, WAV, M4A/AAC, FLAC, OGG and OPUS; Safari also reads ALAC and AIFF. WMA files usually can't be opened in a browser.
🔒 Your files are converted by your own browser and are never uploaded.