Free Online Audio Converter – Convert MP3, WAV, OGG, FLAC

Audio Converter

Convert audio files directly in your browser. Fast, 100% private, supports MP3, WAV, OGG, FLAC.

Drag & drop an audio file here or click to browse

Supports MP3, WAV, OGG, FLAC, AAC, M4A, etc. (Max 1GB recommended)

Error message details appear here.
audio_track.mp3
MP3 00:00 0.0 MB
Choose Output Format
MP3
WAV
OGG (Opus)
FLAC
Higher bitrates provide better sound quality but result in larger output file sizes.
0%
Decoding audio...
Please do not close this browser tab while processing.

Audio Converted Successfully!

Format: MP3
Duration: 00:00
Output Size: 0.0 MB

Free Online Audio Converter – Convert MP3, WAV, OGG, FLAC

Our browser-based, high-fidelity audio converter tool lets you transcode your favorite tracks and recordings instantly. Operating 100% locally on your machine, your audio files are never uploaded to a remote server. Safely and securely encode MP3, WAV, FLAC, and OGG tracks without creating an account or installing any heavy desktop applications.

How to Convert Audio Files?

  1. Upload Audio: Click the dropzone above or drag and drop an audio file (such as MP3, WAV, FLAC, AAC, or M4A) directly into the dotted area.
  2. Select Format: Pick your desired output file format from the options: MP3, WAV, OGG (Opus codec), or FLAC.
  3. Adjust Options: Customize encoding parameters like bitrate for MP3/OGG (128kbps, 192kbps, 256kbps, 320kbps) or compression level for FLAC.
  4. Convert & Download: Click the "Convert Audio" button. Wait a brief moment for the browser to run high-speed calculations, then save your newly rendered track!

Why Use This Audio Converter?

Unlike other websites that upload your personal recordings and large files to their backend systems, our converter uses advanced client-side technologies. This keeps your data completely confidential and removes limits on upload speeds. It utilizes highly optimized WASM and native browser capabilities to ensure fast, studio-grade transcoding at any time.

Frequently Asked Questions

Is this audio converter free to use?

Yes, our utility is completely free. There are no hidden subscription packages, conversion counts, watermark restrictions, or registrations needed.

Are my audio files uploaded to a remote server?

Absolutely not. The app decodes, processes, and encodes your audio directly in your browser using Client-Side Javascript and WebAssembly. Your files never leave your computer, ensuring absolute privacy.

What audio formats are supported?

We support decoding for any audio format your browser naturally supports (including MP3, WAV, OGG, FLAC, M4A, AAC, and WebM). You can encode and output files to WAV (PCM 16-bit), MP3 (lamejs), OGG (Opus codec), and FLAC (lossless stream).

Is there an upper file size limit for audio files?

Since files are held and processed entirely in browser memory (RAM), we recommend a maximum file size of 150MB. Larger files may hit browser memory boundaries and cause tab crashes depending on your hardware.

How does the browser-side conversion work?

First, the browser decodes the uploaded binary stream into high-precision, uncompressed Float32 PCM samples (AudioBuffer) using the Web Audio API. Then, optimized libraries (like lamejs and libflac.js) scale and encode those samples to construct a downloadable output Blob.

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