UltKit

Video to Audio Converter

Pull the sound track out of a video and save it as an audio file you can play in a music app, edit in a DAW or send as a voice memo. Choose the format, trim to the part you need, and the picture is left behind.

Video to Audio

or drop MP4, MOV, MKV … files here ·

Max 95 MB per file· Up to 20 files· Deleted after 30 minutes

Output

Files are processed on our servers and deleted after 30 minutes.

How to use this tool

  1. 1

    Upload the videos

    Add up to 20 files, each up to 95 MB: MP4, MOV, MKV, WebM, AVI, WMV, FLV, 3GP, MTS and other video formats.

  2. 2

    Pick the audio format

    MP3 at 192 kbps is preselected in Convert to. Choose WAV, FLAC or AIFF for editing, or M4A for Apple devices. Advanced settings holds sample rate, channels, volume, track and trim.

  3. 3

    Extract and save

    Press Extract to MP3 (the label follows your format) and download the files singly or as one ZIP. The server deletes uploads and results 30 minutes after processing.

To get the audio from a video, upload it, keep MP3 or choose another format, and press Extract to MP3: the picture is dropped and only the sound is saved.

Audio formats you can extract from a video

Approximate size of one minute of stereo sound. Lossless sizes depend on the source sample rate; FLAC varies with the material.
FormatTypeSize per minuteBest for
MP3Lossy, 64–320 kbpsabout 1.4 MB at 192 kbpsAny player, car stereos, sharing
M4A / AACLossy, 64–320 kbpsabout 1.4 MB at 192 kbpsiPhone, Apple Music, GarageBand
OGG / OpusLossy, 64–320 kbpsabout 1 MB at 128 kbpsWeb players, games, voice
WMALossy, 64–320 kbpsabout 1.4 MB at 192 kbpsOlder Windows Media setups
WAV / AIFFUncompressedabout 10 MB at 44.1 kHz, 16-bitEditing, mastering, transcription
FLACLossless compressedoften 5–7 MBArchiving music without loss

Most videos already carry compressed sound: phones and cameras record AAC, web videos often use Opus, and older AVI files may hold MP3. Extracting means decoding that track and writing it again in the format you pick. Lossless targets (WAV, FLAC, AIFF) keep exactly what was decoded; lossy targets compress it a second time, which is fine at a sensible bitrate.

MP3 is still the safest default. It was standardized by ISO/IEC MPEG in 1993, its patents expired in 2017, and nearly every device plays it. For the most common jobs, use MP4 to MP3 for phone and downloaded clips, MOV to MP3 for iPhone and QuickTime recordings, and MP4 to WAV when the sound goes into an editor or a transcription service. A deeper walkthrough is in how to convert MP4 to MP3.

Sample rate, channels, bit depth and the other audio settings

  1. Bitrate

    For lossy formats, 64 to 320 kbps. 192 kbps (the default) sounds like the video for most music; 128 kbps is plenty for talks.

  2. Sample rate

    Keep the source, or force 48, 44.1, 32, 22.05, 16 or 8 kHz. Video audio is usually 48 kHz; 16 kHz is enough for speech recognition.

  3. Channels

    Same as source, stereo or mono. Mono halves the size of lossless files and suits single-microphone recordings.

  4. Bit depth

    For WAV, FLAC and AIFF: 16-bit (CD quality), 24-bit for editing, or 32-bit float for mixing headroom.

  5. Normalise volume

    Brings the loudness to −16 LUFS so quiet recordings and loud ones end up at a similar level.

  6. Audio track

    1 to 16. Choose another number for a second language, a director's commentary or a separate microphone.

Extract only part of the sound

Start at and End at turn the tool into a quick audio cutter. Type seconds such as 95, or minutes and seconds such as 1:35; leave a field empty to keep the start or the end. This is the fastest way to save one song from a concert video, a quote from an interview or a sound effect from a game capture, without opening an editor.

If you need the video itself shortened, with the picture kept, use trim video instead. To save a whole audio file in another format later, the audio converter handles audio-to-audio conversions.

TipFor a voice memo or lecture you will transcribe, choose WAV, 16 kHz and mono: transcription services accept it everywhere and the file stays small for an uncompressed format.

When the extracted audio is silent, wrong or out of sync

  • The audio file is completely silent

    Some screen recordings and muted social clips have no sound track at all, or the sound is on track 2. Try Audio track 2, and check the video plays with sound before uploading.

  • You hear the wrong language or a commentary

    Change Audio track to the number of the track you want; players usually list tracks in the same order.

  • The voice is very quiet

    Turn on Normalise volume. It lifts the whole recording to a standard loudness without clipping peaks.

  • The file will not import into an editor

    Some editors reject Opus, OGG or WMA. Extract again as WAV at 48 kHz, 24-bit, which every audio editor accepts.

Audio formats
9
Videos per batch
20
Largest video
95 MB
Selectable audio tracks
16

Extracting audio from video: questions

Does extracting audio from a video lower the sound quality?

If you choose WAV, FLAC or AIFF, the decoded sound is stored without any further loss. A lossy target such as MP3 encodes it once more, so pick a bitrate at least as high as the video's own audio, which is often 128 to 256 kbps AAC, to keep the change inaudible.

Which format should I use to get audio from a video for an iPhone ringtone or Apple Music?

M4A. It holds AAC audio, the format Apple's apps use natively, and plays in Music, Files and GarageBand. MP3 also plays on an iPhone, but M4A gives slightly better sound at the same bitrate.

My video has two languages. How do I get the second one?

Set Audio track to 2. Track 1 is the main track, and files from Blu-ray rips, game captures or dubbed films can hold up to 16. If you are unsure which number is which, extract a short section of each with Start at and End at first.

Why is the audio file bigger than the video?

That happens with WAV and AIFF, which store every sample uncompressed: about 10 MB per minute of stereo sound at 44.1 kHz. A heavily compressed phone video can be smaller than that. Pick MP3 or M4A if size matters.

Can I turn the extracted sound back into a video with a picture?

Yes. Audio to video takes an MP3, WAV or M4A plus a cover image, or draws a waveform, and saves an MP4 you can post to YouTube or Instagram.

What does Normalise volume do to my recording?

It measures the overall loudness and raises or lowers it to −16 LUFS, a common target for podcasts and spoken audio. Quiet phone recordings of a lecture become easy to hear; music that is already loud is turned down slightly rather than distorted.

Can I extract audio from a long video, such as a two-hour lecture?

Yes, as long as the video file itself is 95 MB or less. Long recordings exported at 720p or lower often fit; a two-hour 1080p file usually does not. Shrink it first with compress video, choosing a low resolution, because the sound is what you are after and the picture quality no longer matters.

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