Extract audio in-browser, no upload

How to use this tool

Upload a video. Drop a video file into the upload area or browse for one on your device.
Choose an output format. Select WAV for uncompressed audio, Opus for a compact modern file, or AAC when your browser supports it.
Optionally trim silence. Enable Trim silence and choose a standard or aggressive sensitivity to remove long near-silent sections.
Extract the audio. Click Extract audio and keep this tab open while your browser decodes and writes the new audio file.
Download the result. When extraction finishes, use the download link to save the audio file to your device.

Extract audio without uploading your video

Video Audio Extractor separates the sound from a video file directly in your browser. Choose a video from your device, select an output format, and the browser decodes only the audio track before creating a downloadable file. Your video is not uploaded to a Toolcroft server, and the work runs locally on your device. Processing speed depends on the video length, audio codec, and available CPU power, so leave the tab open until the download is ready. Decoded audio is buffered in memory before encoding, so long, multichannel, or high-sample-rate tracks can use much more memory than the compressed video file suggests; the 4 GB file limit is not a memory guarantee.

Choose the format that fits your use

WAV is uncompressed, making it useful when you need an editing-friendly source file or want to avoid another quality-loss step, but WAV files are usually large. Opus is a compact modern format that works well for sharing and archiving speech or music. AAC is often the most useful choice for broad device and media-player compatibility, although its availability depends on whether the browser can encode it. A practical example is pulling a lecture's audio from a screen recording so you can listen to it while commuting without keeping the much larger video.

About Trim silence

The optional Trim silence control removes sufficiently long near-silent sections by measuring audio volume. It is not speech-aware: quiet background hum can remain, and very soft speech may be treated as silence, especially with the aggressive setting. Use the standard setting first and listen to the downloaded file before deleting the original video. This tool does not remove background noise or distinguish speech from music; it only trims portions whose volume falls below the selected threshold.

Frequently asked questions

Is my video uploaded anywhere?

No. The video stays on your device. Your browser extracts and encodes the audio locally, without sending the file to a Toolcroft server.

Which output format should I choose?

WAV is uncompressed and broadly compatible but produces the largest files. Opus is a compact, high-quality modern format. AAC is widely supported by media players when your browser can create it.

Why is MP3 not available?

Browsers do not include a built-in MP3 encoder. Rather than add an extra encoder dependency, this tool offers WAV, Opus, and AAC where supported by your browser.

Does Trim silence understand speech?

No. It detects near-silent audio by volume, not speech. It can leave quiet background noise in place and may clip very soft speech, so review the result before relying on it.

Why might extraction fail?

A browser can only decode and encode the codecs it supports. Encrypted, damaged, unusually encoded, or very large video files may not be processable locally.

Will a long video use a lot of memory?

It can. The browser buffers decoded audio samples before encoding the result, so long, multichannel, or high-sample-rate tracks can use much more memory than the compressed video file suggests. The 4 GB input limit does not guarantee that every device has enough memory; shorten a long recording before extracting it.