Privacy First
Uploaded files are automatically and permanently deleted within two hours.
Automatic deletion
MP4 to MP3
Extract the audio from an MP4 video and save it as a compact MP3.
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Free: Convert MP4 to MP3 at no cost, with no sign-up required.
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Privacy: Your videos and MP3 downloads are automatically deleted after 2 hours.
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Handle videos over 1 GB and export at crystal-clear 320kbps quality, with no daily caps.
Bitrate
Determines audio quality and file size. Select 'Auto' and we'll automatically pick the best options for your file.
Video audio extraction
Convert MP4 to MP3
Extract the audio from MP4 videos as widely supported MP3. It is free, requires no sign-up, and stays simple from upload to download.
How to use Converter App
1
Upload MP4
Choose the MP4 video you want to turn into an audio track.
2
Create MP3
We extract the audio stream and encode a compatible MP3 with sensible settings.
3
Download audio
Save the finished MP3 for players, podcasts, notes, or editing apps.
Key features
Audio-first quality
The converter focuses on sound, not unnecessary H.264 or H.265 video data.
Large video uploads
Upload MP4 videos over 1 GB for long recordings, lectures, or camera exports.
No daily limits
Convert multiple MP4 videos to MP3 tracks without a daily conversion cap.
Auto-delete privacy
Your uploaded videos and MP3 downloads are automatically deleted after 2 hours.
Comparison
A fast and free alternative to expensive video conversion tools.
Extract audio from video using your browser without downloading heavy software, manual codec configuration, or paying for subscriptions.
| Feature | Converter App | Local Software (e.g., FFmpeg) | Paid/Freemium Services |
|---|---|---|---|
| Cost | 100% Free | Free, but consumes local CPU | Monthly plans or pay-per-file |
| Setup | Instant access | Requires install and codec setup | Account creation mandatory |
| File Size Limits | Large video files supported | Depends on your PC's RAM | Restricted on free tiers (e.g., 50MB) |
| Processing Speed | Cloud-accelerated | Depends on device hardware | Often throttled on free tiers |
| Privacy | Files deleted within 2 hours | Fully local | Stored per provider policies |
Experience & privacy
Built for reliable audio conversion.
Backed by 10+ years of engineering expertise in large-scale data and scientific computing, it’s built for real-world workflows that require uncompromised audio quality, accelerated processing speeds, and reliable, high-level performance.
Trusted by Users
Rated 5 stars on Trustpilot for speed, reliability, and ease of use.
User trust
Academic Use
Referenced in published research and used for interview transcription and qualitative data analysis.
Research use
User reviews
Users rely on our MP4 to MP3 converter to easily extract audio from video clips, music videos, and podcasts.
Discover why thousands of users choose Converter App. Read verified Trustpilot reviews from people turning MP4 video files into high-quality MP3 audio daily.
5.0
Based on the 455 reviews
Trustpilot
FAQ
Frequently Asked Questions
How do I rip the audio from a pile of MP4 clips without babysitting each one?
Queue up to 20 MP4 files in batch mode and run them together; you’ll get MP3 files with the video removed and only the soundtrack kept. Download the results together when the run finishes.
Which MP3 bitrate should I pick so the file isn’t huge but doesn’t sound wrecked?
Use the bitrate that matches the content, not the video quality.
- Speech, lectures, voice notes: 64–96 kbps, often mono.
- Podcasts or mixed voice/music: 96–128 kbps.
- Music: 192–320 kbps, stereo.
How do I avoid losing quality when turning MP4 audio into MP3?
You can’t make this lossless: MP3 is another lossy encode, and the video frames are discarded completely. Pick a bitrate close to or above the source audio’s bitrate, but don’t export a bad 96 kbps MP4 at 320 kbps and expect missing detail to come back.
Why did the MP3 come out quiet or distorted when the MP4 played fine?
The real cause is usually the source audio level, not the .mp4 extension: it was recorded too low or already clipped before conversion. Raise the MP3 bitrate to avoid extra compression damage, but clipping and bad gain need fixing in the original audio.
Can I convert a giant MP4 or keep running MP4 to MP3 jobs without hitting a paywall?
Yes. Converter App is free and unlimited, and we don’t put a strict file-size cap in front of multi-gigabyte MP4s; the honest limit is your upload speed and how long the audio takes to encode.
Do I have to make an account, and what happens to my MP4 after conversion?
No account, email, payment, or desktop install is required. Files run in isolated sandboxes and are deleted automatically right after the MP4 to MP3 job finishes.