Convert MP4 to MP3 Online Free
UToolSet is a free online MP4 to MP3 video converter. Upload an MP4, MOV, MKV, AVI or WebM file (up to 500 MB), choose MP3 or WAV, and download the audio in seconds. Pick up to 320 kbps, trim the clip if you want, and convert with no sign-up.
Drop your video here, or browse
Supports MP4, MKV, AVI, MOV, WebM, FLV, WMV (Up to 500 MB)
video.mp4
Audio Trimmer & Range Selector
Extracting Audio...
Uploading video & processing...
Please keep this tab open while conversion completes.
Conversion Complete!
Your audio has been extracted with studio fidelity and is ready for download.
How to Convert MP4 to MP3 Online Free
You can change MP4 to MP3 online free in four steps. No software is needed.
Drop your file or click browse. Files up to 500 MB work.
Select MP3 (320, 192 or 128 kbps) or lossless WAV.
Set a start and end time, or use the First 30s and First 60s shortcuts.
Click Convert, preview the audio, then download your MP3.
The same steps let you transform MP4 in MP3 format, or transform MP4 to MP3 online from any phone or computer.
Free Online MP4 to MP3 Audio Converter: Features
- Free video converter MP4 to MP3: no account, no watermark, no trial.
- Up to 320 kbps: choose the quality that fits your use.
- MP3 or WAV: universal MP3, or lossless 16-bit WAV for editing.
- Built-in trimmer: cut only the part you need, with touch-friendly controls on mobile.
- Works in your browser: nothing to install on Windows, Mac, Android or iPhone.
Extract Audio from Video Online Free
Besides MP4, you can save audio from video files in these formats:
| Video format | Typical source | Output |
|---|---|---|
| MP4 | Phones, cameras, downloads | MP3 or WAV |
| MOV | iPhone and Mac recordings | MP3 or WAV |
| MKV | Movies and screen recordings | MP3 or WAV |
| AVI, WMV | Older video files | MP3 or WAV |
| WebM, FLV | Web videos and screen captures | MP3 or WAV |
Common uses: turning a lecture into a podcast, keeping a song from a music video you own, saving a voice recording, or exporting audio from MP4 for editing.
Which MP3 Quality Should You Choose?
| Setting | Best for | Approx. size per minute |
|---|---|---|
| MP3 320 kbps | Music, best quality | 2.4 MB |
| MP3 192 kbps | Everyday listening | 1.4 MB |
| MP3 128 kbps | Speech, podcasts, small files | 1 MB |
| WAV 16-bit | Editing, no compression | about 10 MB |
An MP3 can never sound better than the audio in the original video. A higher bitrate keeps more of that audio but does not improve it.
Best MP4 to MP3 Converter: Free, No Download
Many people search for a free MP4 to MP3 converter download. You do not need one. UToolSet runs online, so there is no installer, no extension and nothing to update. Open the page, convert, and download only the MP3.
Your Files Stay Private
Files are processed in an isolated sandbox and deleted automatically after conversion. The download link expires after use. Only convert videos you own or have permission to use.
MP4 to MP3 Converter FAQ
Frequently asked questions about converting video to audio online.
How do I convert MP4 to MP3 online for free?
Upload your MP4 file, choose MP3 and a bitrate (128, 192 or 320 kbps), then click Convert. Download the MP3 when it finishes. It runs in your browser, with no software and no sign-up.
Can I extract audio from a video online for free?
Yes. Upload a video in MP4, MOV, MKV, AVI, WebM, FLV or WMV format (up to 500 MB). The tool extracts the audio track as MP3 or WAV, and you can trim it before downloading.
How do I take or export audio from an MP4 file?
Open the converter, drop in your MP4, pick MP3 or WAV, optionally set start and end times with the trimmer, and convert. The result contains only the audio from your video.
Is there a free MP4 to MP3 converter download?
You do not need to download or install anything. This converter works online in your browser. You only download the finished MP3 file.
Can I convert MP4 to MP3 online free and unlimited?
You can convert as many files as you like for free, with no account needed. Each file can be up to 500 MB.
Which MP3 bitrate should I choose?
Choose 320 kbps for music and best quality, 192 kbps for a balance of quality and size, and 128 kbps for speech, podcasts or small files.
Are my files private?
Files are processed in an isolated sandbox and deleted automatically after conversion. The download link expires after use.