mp4tomp3.live
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Video to MP3 —
Audio extracted fast

Drop a video, pick a bitrate, download your MP3. Server-side FFmpeg processing means your device stays cool and the file comes out right.

Sub-30s processing🔒 Deleted after conversion🎵 Up to 320 kbps📁 Files up to 500 MB
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Every major video format

.mp4MPEG-4 · Phones, cameras, streaming
.movQuickTime · iPhone, Final Cut Pro
.aviAVI Container · Screen recorders, legacy cams
.mkvMatroska · HD films, multi-track audio
.webmWebM / VP9 · Browser recordings, YouTube
.ogvOGG Video · open-source media
.3gp3GPP · older mobile devices
.mpegMPEG · legacy broadcast

Pick your bitrate

Standard
128 kbps
Clear speech reproduction
Smallest output size
~1 MB per minute
Podcasts & voice
Recommended ✦
192 kbps
Full music fidelity
Balanced file size
~1.5 MB per minute
Best for most uses
Audiophile
320 kbps
Maximum MP3 quality
Near-lossless output
~2.4 MB per minute
Studio monitoring
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What the converter actually does

Why MP3 still wins

AAC and Opus technically compress better than MP3 at equivalent bitrates — but MP3 plays everywhere. Car stereos, Bluetooth speakers, smart TVs, every phone OS, every media player. Zero exceptions. At 192 kbps or above, the perceptual quality gap between MP3 and newer formats is unmeasurable in real listening tests.

The sample rate

Output is always 44,100 Hz stereo — CD quality, and the universal standard for MP3 compatibility. We use constant bitrate (CBR) mode rather than VBR, which gives you predictable file sizes and consistent behavior when scrubbing through audio in any player.

How FFmpeg processes your file

1

Demux — the container is opened

FFmpeg reads your file's container (MP4, MKV, MOV…) and identifies the individual streams inside: video encoded in H.264/H.265, audio in AAC, Vorbis, or similar.

2

Decode — the audio stream is uncompressed

The audio codec (whatever it is) is decoded to raw PCM audio data — uncompressed samples at full quality. Video is ignored entirely; only the audio stream is touched.

3

Encode — LAME compresses to MP3

The PCM audio is fed into the LAME MP3 encoder at your chosen bitrate. LAME applies psychoacoustic compression, removing frequencies below the threshold of human hearing while preserving everything you'd actually notice.

Typical conversion speeds

Under 50 MB5–15 seconds
50–200 MB15–30 seconds
200–500 MB30–60 seconds

Speed scales with audio duration, not file size. A 3-minute 4K video converts just as fast as a 3-minute 720p clip because only the audio stream is processed.

What people actually use this for

Podcast production

Pull audio from video interviews, webinars, or panel recordings. Skip the re-record.

Lecture archiving

Convert recorded classes into audio for studying on the go — commutes, gym, anywhere.

Concert & live music

Extract clean audio from live performance or DJ set recordings into your music library.

Transcription prep

Feed clean MP3s into Whisper, Otter, or Google Speech instead of heavy video files.

Voiceover isolation

Pull narration from explainer or tutorial videos for reuse in new projects.

Social media repurposing

Turn Reels, Shorts, or TikToks into audio clips for messaging apps or audio platforms.

Your files never persist

Every upload arrives over TLS 1.3 encryption and lands in a unique, isolated temp path. The moment FFmpeg finishes encoding, your original video is permanently deleted from the filesystem — not moved to trash, unlinked immediately. The output MP3 stays downloadable for 60 minutes, then an automated job removes it.

Server logs record timestamps and response codes only. Filenames and file content are never logged, indexed, or accessible to anyone. Your file exists on our servers for under an hour total.

Converter FAQ

Files under 100 MB typically finish in 10–20 seconds. Larger files (up to 500 MB) can take 30–60 seconds depending on server load. You get a live progress bar the whole way — no staring at a spinner.

Not simultaneously — the converter handles one file at a time for maximum speed. Once yours is done, just hit "Convert another file" and you're back to the drop zone in one click.

MP3 uses perceptual coding to discard frequencies that most listeners can't detect. At 192 or 320 kbps, the difference is inaudible on any consumer playback gear. If you're doing professional work that demands bit-perfect audio, FLAC is the better choice — but for everything else, high-bitrate MP3 is genuinely indistinguishable.

We extract the full audio track from your video. For trimming, Audacity is free, fast, and brilliant for this — download the MP3, open it in Audacity, and cut what you need. We may add in-browser trimming down the line.

LAME MP3 via FFmpeg — the same encoder that recording studios, streaming platforms, and broadcast networks rely on. It's been the industry gold standard for 25+ years and produces the best MP3 output available.

For multi-track containers like MKV, we extract the primary (default) audio stream. If you specifically need a secondary track — say, a different language dub — drop us a message via the contact page.

Another file waiting?

Scroll back up — the converter is right there at the top of this page, ready to go again.

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