Audio Format Converter Online

Convert MP3, WAV, FLAC, OGG, AAC, M4A, WebM and Opus audio files — entirely in your browser. No upload, no server, no waiting.

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Features

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100% Private

All conversion happens locally in your browser using WebAssembly. Your audio files are never uploaded to any server.

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8 Input Formats

Supports MP3, WAV, M4A, FLAC, OGG, AAC, WebM, and Opus as input — the most common audio formats covered.

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Quality Control

Choose bitrate (64–320 kbps) for lossy formats like MP3, OGG, and AAC, or sample rate (44.1/48 kHz) for lossless WAV and FLAC.

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3 Upload Methods

Drop files onto the page, click to browse, or paste audio files directly from your clipboard with Ctrl+V.

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Powered by FFmpeg

Uses FFmpeg compiled to WebAssembly — the same professional-grade audio engine trusted by developers worldwide.

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Dark Mode Ready

Comfortable to use day or night with full dark mode support and a clean, minimal interface.

How to Use

1

Upload your audio file

Click the drop zone, drag and drop your audio file, or press Ctrl+V to paste from clipboard. Supports MP3, WAV, M4A, FLAC, OGG, AAC, WebM, and Opus.

2

Choose output format and quality

Select your target format (MP3, WAV, FLAC, OGG, or AAC). For lossy formats pick a bitrate; for lossless formats choose a sample rate.

3

Convert and download

Click Convert and watch the real-time progress bar. When done, click Download to save the converted file to your device.

Frequently Asked Questions

Is this audio converter free to use?
Yes, completely free with no account required. You can convert as many files as you need.
Are my audio files uploaded to a server?
No. All conversion is done locally in your browser using WebAssembly (FFmpeg.wasm). Your files never leave your device.
Which input formats are supported?
MP3, WAV, M4A, FLAC, OGG, AAC, WebM, and Opus. These cover virtually all common audio formats.
Which output formats are available?
You can convert to MP3, WAV, FLAC, OGG, or AAC.
What does the 'loading engine' message mean?
FFmpeg needs to download the WebAssembly engine (~30 MB) on first use. This is a one-time download; subsequent conversions start immediately.
Why does it say multi-threading is not available?
Multi-threaded conversion requires specific browser security headers (COOP/COEP). When unavailable, the tool automatically falls back to single-threaded mode — it still works, just a bit slower.

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