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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

La calculadoraPage 1

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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: 2026-09-07Update: 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 →

Cómo funcionaPage 2

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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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FAQ y detallesPage 3

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Convert audio to 6 formats with bitrate control, or extract audio from video. Everything runs locally; nothing is uploaded.

FreeToolHub Audio Converter is a free browser-based tool — convert audio to 6 formats with bitrate control, or extract audio from video. No signup, no upload; everything runs locally in your browser.

Sobre esta herramienta

¿Qué es esta herramienta?

Convierte audio entre 6 formatos con control de bitrate, o extrae la pista de sonido de cualquier vídeo. En el navegador, sin subidas.

6 formatsBitrate controlVideo → audio100% local

¿Qué es el conversor de audio?

El conversor de audio decodifica localmente cualquier archivo de audio o vídeo con ffmpeg.wasm y lo vuelve a codificar en uno de seis formatos. Los destinos con pérdida (MP3, AAC, OGG, M4A) ofrecen control de bitrate de 128 a 320 kbps; los destinos sin pérdida (WAV, FLAC) conservan cada muestra. Al soltar un vídeo se extrae automáticamente su pista de audio.

¿Quién debería usar esta herramienta?

Quién necesita cambiar el formato de una pista para un dispositivo o una aplicación concreta —un podcast que debe ser MP3, una muestra que debe ser WAV, un tono de llamada que debe ser M4A—. Productores que ajustan el bitrate para reducir el tamaño sin perder calidad perceptible. Creadores que extraen la banda sonora de un vídeo como archivo de audio. Y cualquiera que prefiera no subir material con derechos de autor, conversaciones privadas o grabaciones personales a un servicio de conversión online.

¿Cómo funciona?

(1) Suelta tu archivo de audio o vídeo. (2) Elige el formato de salida —MP3, AAC, OGG, M4A, WAV o FLAC— y, en los formatos con pérdida, el bitrate entre 128 y 320 kbps. (3) Convertir. La decodificación y la recodificación ocurren íntegramente en tu dispositivo mediante WebAssembly, así que el archivo nunca se sube a ningún servidor. (4) Descarga el resultado. Todo el proceso es local, no hay cola de espera y los archivos grandes no dependen de la velocidad de tu conexión.

Preguntas frecuentes

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.

MP3 vs WAV — which should I convert to?

WAV when the file faces further editing or archival (lossless, large); MP3 for distribution and listening (universal, small). A practical pattern: convert to WAV for your master copy, MP3 320 kbps for sharing — this tool produces either directly.

What bitrate should I choose for MP3?

320 kbps for music if storage is no concern — it is transparent to nearly all listeners. 192 kbps is the practical sweet spot with no perceptible loss for most material. 128 kbps is fine for speech and podcasts, where source quality is lower anyway.