Skip to content
Marvin's Toolbox.

Video Audio Extractor

Pull the audio track out of a video as MP3, M4A, WAV, FLAC or OGG. Drop in one or more files, pick a track and bitrate, or keep the original audio untouched when the format allows it, and download the results.

Runs entirely in your browser. Nothing you put in here gets uploaded.

Your videos

Drop videos here

MP4, MOV, WebM, MKV, AVI and more. Click to choose files.

They never leave your browser.

Output

Format

Plays everywhere. 192 kbps is a good balance for music, 320 kbps is near transparent.

Channels

Next steps

Send this tool's output straight into another tool.

Audio Trimmer

Cut a section out of an audio file on a zoomable waveform timeline. Drag the start and end handles, play back just your selection, fade the edges if you like, and export the result as MP3, WAV, OGG, FLAC or M4A.

audiomedia

Audio and Video Transcriber

Turn speech in an audio or video file into text with Whisper. Pick a model size and a language, or translate to English, then read a timestamped transcript and download it as text, SRT or VTT subtitles.

mediaaudiovideotext

Hash Generator

Hash text or a file with MD5, SHA-1, SHA-256, SHA-512, SHA-3, BLAKE2, BLAKE3, CRC32 and more, all computed live as you type. Compare against an expected checksum and copy any digest.

devsecurity

Checksum Validator

Verify a file against its checksum. Drop the file and paste the expected hash or a sha256sum line, and the hash type is detected for you, from MD5 to BLAKE3.

devsecurity

Data Compressor

Compress text or a file with gzip, deflate, brotli or Zstandard and see the size before and after, the compression ratio and how long it took. One click tries every method and recommends the smallest result.

devcompress

Data Decompressor

Decompress gzip, deflate, brotli or Zstandard data from a file or pasted Base64 and read the result as text or download it. Detects the format from the magic bytes where possible, with a manual override.

devcompress

Hex Viewer

Inspect any file or text as a hex dump with offsets, byte values and an ASCII column. Jump to an offset, search for bytes or text, select a range to see it decoded as integers and strings, and copy or download the dump.

dev

Audio Inspector

See everything about an audio file: duration, format, codec, sample rate, bit depth, channels and bitrate, the embedded tags and cover art, plus measured peak and RMS levels and a waveform overview.

mediaaudio

Audio Converter

Convert audio files between MP3, WAV, OGG, FLAC and M4A. Drop in as many files as you like, pick the target format and bitrate, and download the results one by one or all at once.

audiomediaconverter

About the Video Audio Extractor Tool

This tool pulls the audio out of your videos. Drop in one file or a whole batch, pick MP3, M4A, WAV, FLAC or OGG with a bitrate or quality, and extract. Each result downloads on its own, or the whole batch comes down as one zip.

Every file is read as soon as it lands, so you see its audio codec, channels, sample rate and duration before anything runs. A video with several audio tracks gets a track picker, and a video without sound says so right in its row.

What you can do

  • Convert MP4 to MP3, MOV to MP3, MKV to MP3 or WebM to MP3
  • Extract audio from a video without re-encoding it
  • Pick one language or commentary track from a video with several
  • Turn a video's sound into WAV or FLAC for editing
  • Downmix surround sound to stereo or mono
  • Batch extract audio from many videos and download one zip

How to use the Video Audio Extractor

  1. 1Drop in your videos, or click to choose them. You can add more at any time.
  2. 2Choose Convert and pick a format and bitrate, or choose Keep original to copy the audio as it is.
  3. 3If a file has several audio tracks, pick the one you want in its row.
  4. 4Hit Extract and watch the progress. You can cancel a running batch.
  5. 5Download files one by one, or everything as a single zip.

Keep original or convert

Keep original copies the audio out of the video bit for bit, without decoding it. That takes a second or two even for a long film and loses nothing, because the audio stays exactly as it was encoded. The output format follows the audio inside the video: AAC and ALAC go into M4A, MP3 stays MP3, Opus and Vorbis go into OGG, FLAC stays FLAC and PCM goes into WAV.

Some codecs have no home in those formats, like the AC-3 and DTS tracks common in films. Those files say why they cannot be copied. You can switch to Convert, or turn on the option that re-encodes just those files and copies the rest.

Convert decodes the audio and encodes it again, which works for every codec and lets you choose the format, bitrate and channels. Picking a higher bitrate than the source has does not bring back any quality. 192 kbps MP3 is a good balance for music, and spoken word is fine well below that.

How it runs

Extraction runs on ffmpeg compiled to WebAssembly, which downloads once (about 32 MB) when you add your first file. Videos are read straight from disk in small pieces rather than loaded whole, so long recordings stay light on memory. Files go through the queue one at a time.

To cut the result down, send it to the Audio Trimmer. To turn speech into text, send it to the Audio and Video Transcriber, and to change the format of audio you already have, use the Audio Converter.

Credits

Open source does the heavy lifting in this tool. Thank you to:

  • ffmpeg.wasm

    A WebAssembly build of FFmpeg, the audio and video toolkit behind half the media software you know.

Everything this site builds on is listed on the credits page.

Related tools

Tools that share a tag with this one.

Audio and Video Transcriber

Turn speech in an audio or video file into text with Whisper. Pick a model size and a language, or translate to English, then read a timestamped transcript and download it as text, SRT or VTT subtitles.

mediaaudiovideotext

Audio Converter

Convert audio files between MP3, WAV, OGG, FLAC and M4A. Drop in as many files as you like, pick the target format and bitrate, and download the results one by one or all at once.

audiomediaconverter

Frames to Video

Turn a series of images into a video. Drop in your frames, reorder them, set the frame rate and resolution, and encode the result as MP4 or WebM, ready to play anywhere.

mediavideoimageconverter

GIF to Video Converter

Convert an animated GIF into an MP4 or WebM video. Videos are far smaller than GIFs and play everywhere, so this is the quickest way to make a heavy GIF shareable.

videoimagemediaconverter

Subtitle Converter

Convert subtitles between SRT and VTT, shift their timing forward or backward, and fix frame rate drift to sync out-of-sync captions. Preview the parsed cues, catch format errors, and download the converted file.

textconvertervideomedia

Video Converter

Convert videos between MP4, WebM, MKV and MOV. Drop in one or more files, pick the target format and quality, follow the encoding progress, and download the results one by one or all at once.

videomediaconverter