Convert video or extract audio without uploading your files
FreeSaveVideo processes supported media directly in your browser. Use it to convert AVI, MOV, MKV, WebM or MP4 files to MP4 or WebM, or extract an audio track as MP3, M4A or WAV. Your source files stay on your device instead of being uploaded to our server.
How to convert MP4 to MP3
- Select or drop one or more local video files.
- Choose Extract audio, select MP3 and pick a practical bitrate.
- Start processing, then download each completed audio file.
MP3 offers broad compatibility. M4A is often smaller at comparable listening quality, while WAV keeps uncompressed audio and creates a much larger file.
Fast copy or compatible conversion?
Fast mode first tries to copy the existing audio and video streams into the selected container, which is quick and avoids quality loss when the codecs are compatible. Compatible mode re-encodes the video for wider playback support and can take longer, especially for large files.
Frequently asked questions
Are my files uploaded?
No. Supported conversion work runs locally in the browser.
Which inputs and outputs can I use?
Common inputs include MP4, MOV, MKV, WebM, AVI, M4V, MP3, M4A, WAV, OGG, Opus, AAC and FLAC. Available outputs are MP3, M4A, WAV, MP4 and WebM.
Why can a conversion fail?
A file may contain an unsupported codec, no audio or video stream, or may exceed the browser's available memory. Try compatible mode, a smaller file, or close other memory-heavy tabs.