Convert audio to MP3 online — free
Convert mobile and messaging audio to MP3
Compatible with WhatsApp, Telegram, and your phone’s voice recorder. We support OPUS, AMR, M4A, OGG, WAV, AAC, and 3GP.
Convert voice notes and audio from WhatsApp, Telegram, or your phone recorder to MP3 format. We support OPUS, AMR, M4A, OGG, WAV, AAC, and 3GP. No installs, no signup, and done in seconds.
Online audio to MP3 converter — free and fast
Learn how to convert any audio file (.opus, .ogg, .wav, .m4a, .aac, and more) to MP3 for free, right in your browser. Works on mobile and desktop — no account required.
How to convert an audio file to MP3
- Upload your audio file (OPUS, AMR, M4A, OGG, WAV, AAC, 3GP).
- Choose the quality (e.g., 128 kbps for a good size/quality balance).
- Click Convert and download your MP3.
Tip: for voice notes, 64–128 kbps is usually enough. For music, 192–320 kbps.
Supported formats
We handle the most common formats from phones and messaging apps:
Why use our converter
- Tailored for mobile voice: built for WhatsApp, Telegram, and voice recorder audio.
- Fast & simple: upload, convert, and download in seconds.
- Free & online: no software installs and no signup.
- Compatibility: convert to MP3 and share via WhatsApp, email, or the cloud.
Quick guides for mobile audio
Convert WhatsApp audio to MP3
From your phone or PC.
Convert Telegram audio to MP3
Download OPUS and convert it.
Move voice notes to PC
Web, email, or cable.
Reduce the size of an MP3
Perfect for sharing on WhatsApp.
What is OPUS and how to convert it
Compatibility and solutions.
Open an AMR file (iPhone/Android/PC)
If your phone can’t play it.
Frequently asked questions
How do I convert WhatsApp audio to MP3?
Download the OPUS file from WhatsApp Web or forward it via email, upload it here, choose the quality, and download the MP3. You can also check the WhatsApp → MP3 guide.
Which MP3 quality should I choose?
For voice/voice notes, 64–128 kbps is enough. For music, 192–320 kbps gives higher fidelity at a larger size.
Can I reduce the size of an existing MP3?
Yes. Upload your MP3 and select a lower bitrate (e.g., 128 or 64 kbps). See more in Convert MP3 to MP3.
Which formats can I convert?
AMR, OPUS, OGG, M4A, WAV, AAC, 3GP, and WhatsApp audio — all to MP3.
Do I need to install anything?
No, it works 100% in your browser.
Are my files stored?
Yes, temporarily to perform the MP3 conversion; they aren’t shared with third parties and are automatically deleted.