UtilityKit

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Video to MP3 Extractor

Extract and save the audio track from any MP4, MOV or WebM video as MP3, WAV or OGG. Fully browser-based.

About Video to MP3 Extractor

Video to MP3 Extractor strips the audio track from any MP4, MOV or WebM video and saves it as an MP3, WAV, or OGG file, entirely inside your browser via ffmpeg.wasm. Your video file is never sent to a server. Choose MP3 for maximum compatibility, WAV for lossless quality (larger files), or OGG for an open-standard compressed format. For MP3, pick from 128 kbps (compact), 192 kbps (standard quality), or 320 kbps (maximum quality). An optional trim lets you extract audio from just a portion of the video rather than the full duration.

Why use Video to MP3 Extractor

  • 100% private — video never leaves your device
  • Three output formats: MP3, WAV, OGG
  • Three MP3 bitrates including 320 kbps for maximum quality
  • Optional trim to extract just the segment you need
  • No watermarks, no signup, completely free
  • Works offline after the first ffmpeg.wasm cache

How to use Video to MP3 Extractor

  1. Upload your MP4, MOV or WebM video file.
  2. Choose the output format: MP3, WAV or OGG.
  3. If MP3 is selected, choose a bitrate (192 kbps is a good default).
  4. Optionally enter start and end times in seconds to trim the audio.
  5. Click 'Extract Audio' and wait for ffmpeg.wasm to process locally.
  6. Play the audio preview, then click Download.
  7. Upload your MP4, MOV or WebM video file via the upload area.

When to use Video to MP3 Extractor

  • Extracting the audio from a recorded lecture or webinar
  • Saving a music track from a video download
  • Creating podcast-ready audio from a video interview
  • Extracting sound effects or music cues from video files
  • Pulling audio from a screen recording for transcript work
  • Creating audiobook-style files from talk-format videos

Examples

Podcast audio from a long interview

Input: 60-min MP4 interview, MP3 output at 192 kbps

Output: Single MP3 around 80 MB, listenable in any podcast app or audio editor

Music track from a music video download

Input: 4-min WebM music video, MP3 output at 320 kbps

Output: MP3 around 9 MB at near-source-quality 320 kbps

Lossless capture for editing

Input: 10-min MOV recording, WAV output, full duration

Output: Around 100 MB stereo 48 kHz WAV ready for further audio editing

Tips

  • Use 128 kbps MP3 for spoken-word podcast cuts; the file size halves compared to 192 kbps with no perceptible difference for voice.
  • Choose WAV when you plan to do further audio editing — re-encoding an MP3 in another tool stacks lossy artefacts.
  • If the source already has AAC audio (most MP4s), OGG produces a fresh re-encode while MP3 at 192 kbps usually sounds identical.
  • For long lectures, trim to a relevant section first — extracting 20 minutes of a 2-hour video instead of the full file is much faster.
  • Save large WAV files as a working master, then re-export to MP3 at 192 kbps for distribution.
  • Keep the tab focused while encoding — background tabs run slower because browsers throttle non-foreground work.

Frequently Asked Questions

Does my video leave my device?▾
No, processing is 100% local in your browser. Your video is never uploaded to any server.
What bitrate should I choose for MP3?▾
128 kbps for spoken word or podcasts. 192 kbps for general music listening. 320 kbps when you need the highest quality and file size is not a concern.
Will WAV produce a lossless audio file?▾
Yes, WAV (PCM) is a lossless format. However it produces much larger files than MP3 — typically 10x larger for the same duration.
Can I extract audio from just part of the video?▾
Yes, use the optional Trim start and Trim end fields to specify a time range in seconds.
What if the video has no audio track?▾
ffmpeg will return an error. Some screen recordings or animated videos have no audio stream.
Why does it need SharedArrayBuffer?▾
ffmpeg.wasm requires SharedArrayBuffer for multi-threaded processing. It is available in Chrome and Edge on HTTPS pages with the correct security headers.
Is there a maximum file size?▾
There is no server-imposed limit. Practical browser memory caps mean very large files (multi-GB) may be slow on low-RAM devices, but most laptops handle a few GB comfortably.
What's the difference between OGG and MP3?▾
OGG (Vorbis) is an open-standard codec that often sounds better than MP3 at the same bitrate, but MP3 has wider device compatibility, especially on older hardware.

Explore the category

Video Mute / Audio Remover Strip the audio track from any MP4, WebM or MOV video, lossless and instant. Add Audio to Video Add or replace the audio track on any MP4, WebM or MOV video — keep, mix, or replace the original audio. Audio Compressor Shrink MP3, WAV, M4A, OGG and FLAC files by re-encoding at a lower bitrate. Choose 32–320 kbps, pick MP3, OGG or M4A output, then download. 100% browser-side via ffmpeg.wasm. Audio Format Converter Convert audio between MP3, WAV, OGG, M4A and FLAC in your browser. Choose bitrate or sample rate, then download. Runs locally via ffmpeg.wasm — no uploads. Audio Merger Concatenate multiple MP3, WAV, M4A, OGG or FLAC files into one continuous audio track. Drag to reorder, set output format and bitrate, then download. Audio Speed & Pitch Changer Speed audio up or slow it down without changing pitch, or shift pitch in semitones independently of speed. MP3, WAV, M4A, OGG, FLAC. ffmpeg.wasm in browser.

Glossary

ffmpeg.wasm
Browser-side build of FFmpeg compiled to WebAssembly. Performs all audio extraction without contacting a server.
SharedArrayBuffer
Shared memory buffer used by multi-threaded WebAssembly. Required by ffmpeg.wasm and gated by COOP/COEP headers.
Bitrate
How many kilobits per second the encoder spends on audio. Higher bitrates mean better quality and bigger files.
Sample rate
How many audio samples per second are stored. Common values are 44.1 kHz (CD audio) and 48 kHz (video audio).
PCM
Pulse Code Modulation — the uncompressed digital audio format used inside WAV files. Lossless but bulky.
Codec
The compression algorithm (MP3, AAC, Vorbis, Opus) that turns raw PCM samples into smaller encoded data.
Container format
The file wrapper (MP4, MOV, WebM) that bundles audio and video tracks together. Extraction reads the audio track from the container.
VBR vs CBR
Variable Bit Rate adjusts bitrate to content complexity for better quality per byte; Constant Bit Rate is steadier and easier to seek in older players.