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Convert MP4 to MP3
Save the sound of an MP4 as an MP3 that plays everywhere. Your file is never uploaded — it's processed right here in your browser.
How it works
01. Add your MP4 file
Drop or choose your MP4 file. Other video formats work too.
02. Pick the quality
192 kbps by default. Choose 128 for speech or 320 for music.
03. Download the MP3
Hit Convert and download your MP3 file when it's ready.
Why convert to MP3?
MP3 plays on phones, cars and even old players. It's the easy way to take a lecture, podcast or song with you without the video.
How the conversion works
The video track is dropped and the audio is re-encoded with the LAME MP3 encoder, running as WebAssembly in your browser. It takes far less time than the video's length.
Frequently asked questions
How big will the MP3 be?
About 1.4 MB per minute at 192 kbps — roughly 1 MB at 128 kbps and 2.4 MB at 320 kbps.
Is my video stored anywhere?
No. The file never leaves your device — it's processed inside this tab with WebCodecs. Close the tab and nothing is left behind.
Is there a file size limit?
Up to 2 GB per file. The result is held in your browser's memory, so on devices with little RAM smaller files are safer.
Which browsers are supported?
Recent Chrome, Edge, Safari and Firefox. Speed depends on your device — desktop Chrome and Edge are usually the fastest.
More free tools
- MP4 → WAV — Convert MP4 to lossless WAV audio. Extract PCM audio in your browser, no install.
- Audio Extractor — Pull the audio out of any video and save it as MP3, WAV, M4A, OGG or FLAC.
- Video Compressor — Shrink video files right in your browser. Pick a quality level or a target size in MB.
- MOV → MP4 — Convert MOV to MP4 for free. Turn iPhone videos into MP4 right in your browser.
- Video Trimmer — Cut out just the part you want. Drag the start and end, or type exact times.
- MP4 → WebM — Convert MP4 to web-friendly WebM for free, with the VP9 codec for HTML5 video.
Got a long video? Make it many shorts
Shorts Zone finds the best moments in a long video and turns them into captioned vertical shorts in one go. Just like this tool, your video never leaves your device.