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First Android release: convert .opus, .ogg, .m4a, .aac, .mp3 and .wav files to MP3 or WAV in batches, entirely on your device.
Convert .opus voice notes and any audio to MP3 or WAV on your phone. No upload.
Turn .opus voice notes into MP3 or WAV files that play everywhere. Pick one file or a hundred, tap Convert, and share the results to Files, Gmail, Drive or any app, with the audio never leaving your phone. Voice messages from chat apps arrive as .opus files, with names like PTT-20260908-WA0012.opus. Most music players, editors, transcription tools, car stereos and older devices cannot open them. This converter decodes Opus on the device and writes an MP3 or WAV in seconds. How It Works 1. Long-press a voice note in your chat app, tap Share and choose this converter, or pick the file from your file manager 2. Choose MP3 or WAV 3. Tap Convert, then Share each file Batch Conversion Select many files at once and convert them with one tap. Each result gets its own Share button, and the originals are left untouched. Formats Input: .opus, .ogg, .oga, .m4a, .aac, .mp3, .wav, .caf, .aiff, .flac, .amr, .3gp and more. Output: MP3 at 128 kbps, which plays on everything and stays small, or lossless 16-bit WAV for editing and transcription. Private By Design Conversion happens entirely on your phone. There is no upload, no account, no sign-up and no analytics, and the app works in airplane mode. Free, with no watermarks and no limits. Opus to MP3 Converter is an independent utility. It is not affiliated with, endorsed by, sponsored by, or in any way officially connected with WhatsApp LLC or Meta Platforms, Inc. WhatsApp is a registered trademark of Meta Platforms, Inc.