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Audio Converter

Convert between MP3, WAV, AAC, OGG, FLAC, and M4A — or pull the audio out of any video. 100% in-browser.

LOCAL · FFMPEG.WASM6 formatsBitrate controlVideo → audio100% local

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Drop audio or video here, or click to browse

MP3, WAV, M4A, OGG, FLAC, MP4, WebM, MOV… (max 100 MB audio / 500 MB video)

Drop an audio or video file, pick a format, and convert it locally

Data Source & Legal Disclaimer

Effective: 2026Last updated: TodayUpdate: Manual review

Sources: ffmpeg.wasm — Browser-based media processing

Audio conversion runs entirely in your browser using ffmpeg.wasm. Your file is never uploaded to any server.

See all data sources & update policy →

Lossy vs lossless audio formats — illustrated

Lossy formats (MP3, AAC, OGG, M4A) discard sounds your ears are least likely to miss — a 192 kbps MP3 keeps roughly one-tenth of the original CD data. Lossless formats (WAV PCM, FLAC) store every sample exactly: WAV uncompressed at ~1,411 kbps, FLAC compressed at 50–70% of that with zero loss. Converting lossy → lossless never restores discarded data (garbage in, bigger garbage out), so use WAV/FLAC when you have a lossless source, and MP3/AAC 192–320 kbps when size matters. Dropping a video file here extracts its soundtrack with -vn — the same engine as the Audio Extractor.

Decode → (lossy: psychoacoustic discard · lossless: entropy compress) → mux

Bitrate only applies to lossy targets; WAV and FLAC ignore it because they keep every sample.

Extracting a podcast from a video — Lena's workflow

Lena records her podcast as an 8-minute (480 s) screen video and needs an MP3 for her RSS feed.

Drop the video:The tool reads 480.0 s of audio from the MP4; the video track will be stripped with -vn
Pick format & bitrate:Podcast feeds universally want MP3; she picks 192 kbps — speech stays crisp and the feed stays small
Size math:480 s × 192,000 bits/s ÷ 8 = 11,520,000 bytes ≈ 11.0 MB — the result card confirms 11.0 MB ✓
Publish:podcast_ep12.mp3 downloads ready for the feed; at 320 kbps it would be 18.3 MB — 320 kbps buys nothing for voice

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About this tool

What is this tool?

Convert audio to 6 formats with bitrate control, or extract audio from video. In-browser.

6 formatsBitrate controlVideo → audio100% local

What Is the Audio Converter?

The Audio Converter decodes any audio or video file locally with ffmpeg.wasm and re-encodes it to one of six formats. Lossy targets (MP3, AAC, OGG, M4A) offer 128–320 kbps bitrate control; lossless targets (WAV, FLAC) keep every sample. Dropping a video extracts its soundtrack automatically.

How to Convert Audio

Drop your file, pick the output format (and bitrate for lossy formats), and click Convert. The result card shows the output size and an inline player so you can check quality before downloading.

Frequently Asked Questions

Which formats can I convert to?

Six outputs: MP3, AAC, OGG, and M4A at 128–320 kbps for lossy sharing, plus WAV (uncompressed 16-bit PCM) and FLAC (lossless compression) for editing and archiving. The bitrate selector only appears for lossy formats because WAV and FLAC keep every sample regardless.

Can I extract audio from a video file?

Yes — drop an MP4, WebM, or MOV and the tool strips the video track (-vn) and converts the soundtrack to your chosen format. That makes this converter a one-stop audio extractor as well.

Will converting lossy to lossless improve quality?

No. Converting MP3 to WAV or FLAC never restores the data the MP3 encoder discarded — you get a bigger file with the same audible quality. Use lossless output when your source is already lossless; use 192–320 kbps lossy when size matters.