AscendLab

Video tools

Video Audio Extractor

New ffmpeg.wasm tool

Private Video Audio Extractor

Extract the audio track from a local video and export it as M4A/AAC or WebM/Opus. FFmpeg runs in your browser after you start extraction.

Free ToolFFmpeg loads only when needed
Video Audio Extractor
Extract the audio track from a local video as M4A/AAC or WebM/Opus in your browser.

Drop video here or click to upload

Choose a video that contains an audio track.

Max file size: 200MB

No video uploaded

Audio settings
Choose an output format and bitrate before extracting the audio track.

AAC audio in an M4A container for broad compatibility.

Output

M4A

Bitrate

128 kbps

Engine

ffmpeg.wasm

Ready0%
Extracted audio
Preview and download the audio file generated in your browser.
Upload a video with audio and extract it to preview the result here.

The source video stays on your device. FFmpeg runs in the browser after you start extraction.

Quick answer

A video audio extractor pulls the audio track out of a video file.

This first browser-side version exports M4A/AAC or WebM/Opus from videos under 200MB.

Best inputs

Videos with audio

The source must include an audio track for extraction to succeed.

Short clips

Smaller files finish faster and are more reliable in browser memory.

Audio extraction method
The tool writes the source video into browser memory and uses ffmpeg.wasm to encode the audio output.
M4A/AAC works well for broad compatibility.
WebM/Opus is useful for browser-native workflows.
Bitrate controls output size and audio quality.
Example, Assumption, and Limitation
Use the result as a practical estimate or transformation, then confirm edge cases for critical work.

Example

Upload a short MP4 interview, choose M4A output at 128 kbps, and download the extracted audio track.

Assumption

The video contains at least one audio track and is under 200MB.

Limitation

This tool does not separate speakers, remove noise, transcribe speech, or preserve multiple audio tracks as separate files.

Common use cases
These pages are built for lightweight browser-side work, examples, and planning.

Podcast prep

Pull audio from a recorded video conversation.

Voice notes

Extract spoken audio from a screen recording.

Editing handoff

Create an audio-only file for review or further editing.

Privacy-first extraction

Avoid uploading unpublished video to a third-party converter.

Frequently asked questions

Does this video audio extractor upload my file?

No. The selected video is processed in your browser with ffmpeg.wasm and is not sent to a backend.

Which audio formats are supported?

The first version exports M4A/AAC or WebM/Opus audio.

What happens if the video has no audio?

FFmpeg will report that no audio track is available. Choose a source video that contains an audio track.

What file size should I use?

Use videos under 200MB for this browser-side version. Smaller clips are recommended on mobile devices.

Suggested workflow

Build a video audio workflow

Inspect the source, extract audio, then mute or compress the video copy if needed.