Universal Audio Converter - Free, Local & Extract from Video

Convert M4A, FLAC, WMA to MP3 or WAV, and extract audio from video files. Runs entirely in your browser with 100% privacy and no file limits.

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Drop audio or video files here

Supports M4A, FLAC, WMA, MP4, MOV, etc. 100% local processing, no size limits.

Add audio or video files to begin.

Processing runs securely in your local browser sandbox. No server uploads.

Conversion Queue

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Your files will appear here.

How to Use

  1. Drag and drop your audio or video files into the upload area or click "Select Files". You can add multiple files for batch processing.
  2. Choose your desired Target Format (e.g., MP3, WAV, OGG, AAC) from the dropdown menu.
  3. Click "Convert" to load the local high-speed processing engine.
  4. Once processing is complete, click "Download" next to each track to save it locally.

Core Features

  • Absolute Privacy (Zero Uploads): Unlike traditional online audio converters, your personal voice memos or unreleased podcast recordings never leave your device. All decoding and encoding happens securely inside your browser.
  • Extract Audio from Video: Beyond converting standard audio formats, you can drop in MP4, MOV, or MKV videos, and the tool will instantly strip and extract the audio track for you.
  • Universal Format Support: Easily convert Apple's M4A, lossless FLAC, or legacy WMA into universally compatible MP3s, or high-fidelity WAV files suitable for professional editing.
  • Unlimited Batch Processing: Say goodbye to file size and quantity limits. You can drop dozens of audio or video files for high-speed batch conversion.

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Calculation Logic

Audio formats can be notoriously frustrating: Apple's M4A voice memos struggle on Windows, lossless FLAC files are too massive for quick sharing, and OGG is required for optimal web audio playback.

This tool utilizes cutting-edge WebAssembly and FFmpeg technology, effectively putting a full-featured audio workstation right inside your web browser. When you need to convert a format or extract background music from a video, your browser directly reads the local file and performs high-speed re-encoding. Since there are no servers acting as middlemen, the process is incredibly fast and guarantees 100% privacy.

FAQ

Can I extract audio from an MP4 movie?

Yes, absolutely. Because our core engine understands almost all multimedia formats, you can simply drop a video file into the tool, select MP3 or WAV as the output, and the tool will automatically ignore the video stream and extract only the audio track.

Why is there no upload size limit?

Traditional converter websites pay for expensive cloud computing and bandwidth, so they enforce limits to push you into premium plans. Our tool utilizes your own device's CPU to perform the conversion, costing us nothing in server resources. Therefore, we don't limit you.

Is it really completely private?

Yes. Your voice recordings and audio files are never uploaded. To verify this, load the page, let the engine initialize, and then completely disconnect your computer from the internet. You'll find that the tool continues to perfectly convert your audio offline.

Will converting to MP3 reduce audio quality?

MP3 is a lossy format. However, we use very high-quality encoding parameters (roughly equivalent to 192kbps VBR), making the quality loss virtually indistinguishable on standard headphones and speakers while drastically reducing file size. If you require absolute lossless fidelity for professional mixing or editing, choose the WAV output format instead.