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Convert Audio & Video to MP3 Fast, free, and secure. All conversions happen locally in your browser. No file uploads, no limits.
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To MP3 Converter is a free, browser-based tool that converts over 30 audio and video formats to MP3 using local WebAssembly processing with no file uploads.
To MP3 Converter is a web application that takes audio files (AAC, WAV, FLAC, M4A, OGG, Opus, etc.) and video files (MP4, AVI, MKV, MOV, WebM, etc.) as input and produces MP3 files as output. The conversion runs entirely in the user's browser via WebAssembly, meaning no files are ever sent to a server. It requires no software installation and works on modern browsers like Chrome, Firefox, Edge, and Safari on both desktop and mobile devices.
Yes, it is completely free with no hidden fees, subscriptions, or limits on the number of conversions.
Yes, all conversion happens locally in your browser using WebAssembly. Your files are never uploaded to any server, ensuring complete privacy.
We support over 30 formats including AAC, WAV, FLAC, M4A, OGG, Opus, MP4, AVI, MKV, MOV, WebM, and many more. All can be converted to high-quality MP3.
No, the converter works directly in your web browser. No installation or downloads are required.
Speed depends on file size and device performance. Because processing is local, typical average-sized files convert in just a few seconds.
Yes, the website is fully responsive and works on modern smartphones and tablets.
