Up to 500 MB · MP4 · processed in your browser, nothing is uploaded.
First use downloads the processing engine (about 25 MB). It is cached afterwards.
How to convert MP4 to MP3
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1
Select the MP4 video
Drag the file onto the upload area or click to choose it on your computer or phone. The video never leaves your device.
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2
Choose the MP3 quality
Set the bitrate (64 to 320 kbps) and the sample rate (22,050, 44,100 or 48,000 Hz). For music, 192 or 256 kbps at 44,100 Hz is a great balance.
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3
Convert
Click Convert to MP3. On the first conversion your browser downloads the converter (FFmpeg); after that it is cached and later conversions start faster.
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4
Download the file
When the progress bar finishes, click Download MP3. To extract audio from another video, use Convert Another Video.
Converted in your browser: no upload, no queue
Most MP4 to MP3 converters upload your video to a server, convert it there and send the file back. Here the whole conversion runs in your browser, using a build of FFmpeg compiled to WebAssembly. That has three practical benefits: the video is never sent over the internet, you don't wait in a queue or depend on your upload speed, and there is no artificial daily limit on the number of files.
Because the work happens on your device, very long videos use more memory. On computers, files of a few hundred megabytes usually convert fine; on budget phones, stick to shorter videos or close other tabs before converting.
Which bitrate should I pick?
The bitrate sets how much space each second of audio takes, and therefore the MP3's quality and size. There is no point choosing a higher bitrate than the original audio: if the video's sound is 128 kbps, converting at 320 kbps only makes the file bigger without improving it.
- 64–96 kbps: speech, lectures, talks and podcasts; very small files.
- 128 kbps: a balanced default for listening on your phone.
- 192–256 kbps: music with good quality on most headphones.
- 320 kbps: the highest MP3 quality, when you want to keep the best possible copy.
Common uses
Pulling the MP3 out of a video is handy for listening to recorded classes and meetings on the go, keeping the soundtrack of a wedding or birthday video, turning band rehearsals and talks into audio you can review, or separating a video's narration to edit it in another app. Only use the tool with videos you recorded or have the right to use.
MP4 to MP3 FAQ
How do I convert MP4 to MP3 for free?
Select the video on this page, choose the quality and click Convert to MP3. It is free, with no sign-up and no watermark on the audio.
Is my video uploaded to a server?
No. The conversion happens in your browser with FFmpeg compiled to WebAssembly. The file never leaves your computer or phone.
Does it work on phones?
Yes, in modern browsers on Android and iPhone. On devices with little memory, stick to shorter videos.
Is there a file size or conversion limit?
There is no limit on the number of conversions. The maximum file size depends on your device's memory, since the processing is local.
Can I convert YouTube videos?
The tool converts MP4 files that are already on your device; it does not download videos from websites. Respect the copyright of the content.
Why is the first conversion slower?
The first time, your browser downloads the FFmpeg converter. After that it is cached and later conversions start almost instantly.
Complete Guide to MP4 to MP3 Conversion: Everything You Need to Know
MP4 to MP3 conversion is essential for extracting audio from videos. Whether you're creating music libraries, podcasts, or just need audio versions of your videos, understanding video to audio conversion can help you achieve the perfect results.
Why Convert MP4 to MP3?
MP4 to MP3 conversion offers numerous benefits for content creators, music lovers, and everyday users. By extracting audio from videos, you can create portable music files, save storage space, and enjoy audio content on any device.
Key Benefits:
- Extract audio from videos for music libraries
- Create portable audio files for mobile devices
- Reduce file size for audio-only content
- Enable playback on audio-only devices
- Separate audio tracks from video content
- Create ringtones and notification sounds
Types of Audio Extraction
Understanding different conversion methods helps you choose the right approach for your needs.
Lossless Extraction
Extracts audio without quality loss. Best for high-quality audio preservation.
Lossy Conversion
Compresses audio for smaller files. Most common for general use.
Best Practices for MP4 to MP3 Conversion
Follow these guidelines to get optimal results from video to audio conversion:
Choose appropriate bitrate settings for your use case
Test converted files on target devices
Consider your audience's storage and bandwidth
Use MP3 for maximum compatibility
Maintain original audio quality when possible
Keep original video files as backups
Convert once to avoid quality degradation
Use appropriate sample rates for different uses
Common Conversion Issues and Solutions
Learn about frequent problems and how to resolve them:
No audio track found in video file
Ensure the video contains an audio track before conversion
Converted file still too large
Reduce bitrate or use lossy compression settings
Converted audio doesn't play on some devices
Use standard MP3 format with common bitrates
Why Choose Our MP4 to MP3 Converter?
100% Private
Files processed locally, never uploaded to servers
Lightning Fast
Convert videos to audio quickly in your browser
Quality Control
Choose bitrate for optimal audio results
Completely Free
No registration, no hidden costs
Secure Processing
Advanced client-side processing
Universal Compatibility
Works with all modern browsers and devices