MP4 to MP3 on iPhone
Convert MP4 to MP3 on your iPhone. No app to download. Open your browser, drop your file, and convert. Done in seconds.
Drop your MP4 file here or click to browse
MP4 (.mp4) · Max 20 MB
Open AudioUtils in Safari on iOS. The converter works on iPhone 8 and newer. No App Store download needed. AudioUtils uses WebAssembly to run the conversion engine locally. Your audio stays on your device.
On iPhone, converted files save to your Files app. Tap the download link and choose where to save.
Both MP4 and MP3 are lossy formats. Each re-encode can degrade quality slightly. Convert once and keep the result. The output is identical regardless of which device or browser you use.
Frequently Asked Questions
Will I lose audio quality converting MP4 to MP3?
A small amount, yes — MP4 audio is usually AAC, and transcoding AAC to MP3 involves a lossy re-encode. At 192 kbps or higher, the loss is imperceptible for voice and most music. For archiving or editing, use MP4 to WAV instead to avoid any transcoding penalty.
What bitrate should I use?
192 kbps for spoken word, podcasts, interviews, and voice memos — clear audio, small files (~1.4 MB per minute). 256 kbps for music, YouTube audio, or video soundtracks — excellent quality. 320 kbps if you want the best possible result from the source. For voice recordings below 96 kbps in the original MP4, 128 kbps MP3 is sufficient — going higher doesn't add quality.
Does this work with screen recordings?
Yes. macOS screen recordings (Command+Shift+5), Windows Game Bar recordings (.mp4), and iPhone screen recordings shared out as MP4 all work. The tool extracts the microphone or system audio track and saves it as MP3.
What about Zoom, Teams, or Google Meet recordings?
Zoom saves recordings as .mp4 locally. Upload that file and extract the audio for transcription, podcast clips, or archiving. Teams and Meet recordings (usually downloaded from OneDrive or Google Drive as .mp4) work the same way.
Can I extract audio from YouTube downloads?
If you have an MP4 file saved on your device, yes. This tool processes files locally — it doesn't download from URLs or accept links. You need to have the MP4 file already on your computer or phone.
What happens to the video data?
The video track is discarded entirely. Only the audio is extracted and converted to MP3. Your original MP4 is untouched — the tool reads it but doesn't modify it. File size drops by 80–95% compared to the original video.
Is this converter free?
Yes. Free users get 5 conversions per month. The output is limited to the first 10 seconds as a preview, with a 20MB input file size limit. Upgrade to Pro for unlimited, full-length conversions.
About MP4
The most common video container format. Used by YouTube, smartphones, and cameras. Extract audio from any MP4 file instantly.
About MP3
The most widely used audio format. Great compatibility, small file size. Ideal for music, podcasts, and general use.