Turn Opus files into MP3s that open outside the app they came from. Drop in an Opus file — a WhatsApp or Telegram voice note, a Discord recording, a browser-recorded clip — and Solmi re-encodes it as a standard MP3 in your browser. No upload, no signup, no watermark.
Drop the Opus file onto the converter and press Convert. Solmi decodes it with your browser's Opus codec, re-encodes the audio as MP3, and hands back a file you can play or download — locally, with no upload.
WhatsApp voice notes are Opus files, usually with an .opus or .ogg extension. Export the note from the chat, drop the resulting file here, and download the MP3. Telegram and Discord voice recordings work the same way.
Opus is a modern, royalty-free codec built for real-time speech and streaming. It sounds noticeably better than MP3 at the very low bitrates voice messaging uses, which is why chat apps adopted it — but far fewer players, editors, and car stereos can open it, hence converting.
Slightly, since a compressed Opus file is being compressed again. Voice notes are recorded at low bitrates to begin with, so choosing 128 kbps or higher for the MP3 preserves what is there — encoding higher will not add back detail Opus never captured.
No. The converter runs entirely in your browser: your file is decoded and re-encoded on your own device, and nothing is sent to a server. That is also why it is fast — there is no upload wait and no download wait, just the conversion itself.
Yes, completely free with no signup, no file-size paywall, and no watermark. Once your audio is converted, you can turn the track into a music video with Solmi's AI music video generator — also free to start.