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Free MP3 Converter

Convert any audio file to MP3 instantly in your browser. No uploads, 100% private.

Your files stay on your device. Nothing is uploaded to any server.

Drop your audio file here

or click to browse · MP3, WAV, AAC, OGG, FLAC, M4A

Pro Tips

128 kbps MP3 is considered "near-CD quality" and is fine for most listening. Only audiophiles need 320 kbps.

For voice recordings and podcasts, 64 kbps mono is perfectly clear and creates much smaller files.

WAV files are uncompressed and can be 10x larger than MP3. Convert to MP3 or AAC for sharing.

All processing happens in your browser. Your audio files are never uploaded to any server.

How to Convert Audio to MP3

MP3 (MPEG Audio Layer III) is the most widely supported audio format in the world. Every device, every app, every operating system can play MP3 files. Converting your audio to MP3 ensures maximum compatibility, whether you are sharing music with friends, uploading to a website, or transferring files between devices.

Our MP3 converter uses FFmpeg compiled to WebAssembly, giving you professional-grade audio encoding directly in your browser. There are no file size limits, no watermarks, and no server uploads. Your audio files stay on your device throughout the entire process.

Supported Input Formats

You can convert from virtually any audio format to MP3: WAV (the most common lossless format), FLAC (lossless compression), AAC (Apple and YouTube default), OGG (Spotify and gaming), M4A (iTunes purchases), WMA (Windows Media), and OPUS (modern web audio). If your device can play it, our converter can likely handle it.

Choosing the Right MP3 Bitrate

The bitrate determines both the quality and file size of your MP3. Higher bitrates preserve more audio detail but create larger files. Here is a practical guide:

  • 64 kbps — Suitable for spoken word (podcasts, audiobooks, voice memos). About 0.5 MB per minute.
  • 128 kbps — Near-CD quality for music. The standard for most streaming. About 1 MB per minute.
  • 192 kbps — Transparent quality. Most people cannot distinguish this from the original. About 1.4 MB per minute. This is our recommended default.
  • 256 kbps — High quality for critical listeners. About 1.9 MB per minute.
  • 320 kbps — The maximum bitrate for MP3. Used by Spotify Premium. About 2.4 MB per minute.

Tips for Best Results

Always convert from the highest quality source available. If you have a FLAC or WAV file, convert directly from that rather than from another lossy format. Converting from AAC to MP3, for example, compounds the quality loss from two rounds of lossy compression. Keep your original lossless files as masters whenever possible.

For voice content, mono MP3 at 64 kbps is perfectly adequate. For music, stereo at 192 kbps is the sweet spot. If storage space is not a concern, 320 kbps provides the highest quality MP3 can achieve.

Frequently Asked Questions

How do I convert audio to MP3?
Upload your audio file by dragging it onto the converter or clicking to browse. Select your desired bitrate (192 kbps recommended), then click 'Convert to MP3'. Your converted file will be ready to preview and download in seconds.
What bitrate should I use for MP3?
192 kbps is the recommended default — it provides transparent quality that most listeners cannot distinguish from the original. Use 128 kbps for smaller files with good quality, 320 kbps for the absolute best MP3 quality, or 64 kbps for voice-only content like podcasts.
Does converting to MP3 lose quality?
MP3 is a lossy format, so some audio data is removed during encoding. At 192 kbps or higher, this loss is imperceptible to the vast majority of listeners. Avoid converting between lossy formats (e.g., AAC to MP3) when possible — start from a lossless source (WAV, FLAC) for the best results.
Can I convert FLAC to MP3?
Yes. FLAC is a lossless format, making it the ideal source for MP3 conversion. Upload your FLAC file, choose your bitrate (192 or 320 kbps for music), and click Convert. You will get a high-quality MP3 without any intermediate quality loss.
Is there a file size limit?
There is no hard limit, but very large files (over 500 MB) may be slow to process since everything runs in your browser. For most audio files, conversion takes just a few seconds.
Are my files private?
Completely. Your audio files never leave your device. All conversion happens locally in your browser using FFmpeg compiled to WebAssembly. We have no servers that receive or store files. When you close the tab, everything is erased from memory.

Last updated: March 2026

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