🎬 Free Browser Tool

Extract Audio from Video

Drop any MP4, MKV, MOV, AVI file and extract its audio as FLAC, ALAC, MP3, AAC, OGG or WAV — no upload, no install.

Output Audio Format
Extraction Mode
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Drop video files here or click to browse
Accepts MP4, MKV, MOV, AVI, WEBM · extracts to FLAC (stream copy)
Guide

How to Extract Audio from Video

Three steps — entirely in your browser, nothing installed.

1

Choose Output Format

Pick your target audio format. Use Stream Copy if you just want the raw audio track with no re-encoding.

2

Drop Your Videos

Drag and drop one or more video files onto the drop zone. MP4, MKV, MOV, AVI, and WebM are all supported.

3

Extract & Save

Click Extract Audio. FFmpeg.wasm processes each file in your browser and downloads the audio automatically.

4

Done

Each extracted audio file is named after the original video. Batch jobs process sequentially, one download per file.

Features

About This Tool

A private, browser-native audio extractor powered by FFmpeg.wasm.

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100% Private

✓ No upload
Your video files never leave your device. FFmpeg.wasm runs entirely in your browser using WebAssembly — no cloud processing, no accounts, no data retention of any kind.
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Stream Copy Mode

✓ Zero re-encoding
Stream Copy extracts the audio track as-is — no decoding, no encoding, no quality loss. It's near-instant even for large files. Use it when the source audio is already in the format you need.
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6 Output Formats

✓ FLAC ALAC MP3 AAC OGG WAV
Re-encode mode converts the extracted audio to any of six common formats. FFmpeg automatically picks the right codec flags and container for every combination, including ALAC in a proper .m4a wrapper.
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Batch Processing

✓ Multi-file
Drop an entire folder of video files at once. Each file is processed and downloaded sequentially. The log panel shows per-file status in real time so you can track progress across a large batch.
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Wide Format Support

✓ MP4 MKV MOV AVI WebM
Works with all major video containers. MKV files with FLAC, DTS, or TrueHD audio can be stream-copied directly. MP4 files with AAC audio extract in seconds with no quality loss.
FAQ

Frequently Asked Questions

Common questions about audio extraction.

Stream Copy (-c:a copy) pulls the audio track out of the video container without touching the audio data — it's instant and lossless. Re-encode decodes the audio and re-encodes it into the chosen format, which takes longer but lets you change the codec. Use Stream Copy whenever possible.

Stream Copy preserves the original codec. If your MP4 has AAC audio and you select FLAC + Stream Copy, the output will still be AAC — just in a new container. To actually change the codec, use Re-encode mode. The output filename will always reflect the container, not necessarily the codec.

Yes. MKV is fully supported. MKV files often contain lossless audio like FLAC, TrueHD, or DTS-HD — use Stream Copy to extract them without any re-encoding. Note that some exotic codecs like DTS-HD MA or TrueHD may require Re-encode mode to convert to a widely supported format.

The entire file is loaded into browser memory before processing. Most browsers allow several gigabytes, but for files over 2 GB you may hit memory limits on low-RAM devices. For large files, native FFmpeg is more reliable: ffmpeg -i video.mkv -vn -c:a copy audio.flac

No. Everything runs inside your browser using WebAssembly. Your video file, the extracted audio, and any intermediate data never leave your device. You can verify by watching DevTools → Network — no video data is ever transmitted.