Free Online Audio Converter

Convertr supports 40+ audio formats including MP3, WAV, FLAC, AAC, OGG, M4A, WMA, AIFF, OPUS, AC3, AMR, and many more. You can convert between any supported format for free.

Yes, Convertr is 100% free to use. There are no hidden fees, no signup required, and no limits on the number of conversions.

Upload your MP3 file using the converter above, select WAV or FLAC as the output format, and click Convert. Your file will be ready to download in seconds.

Converting between lossless formats (WAV, FLAC, AIFF) preserves full quality. When converting to lossy formats (MP3, AAC, OGG), you can set the bitrate to control quality. Higher bitrates (256-320 kbps) produce near-lossless results.

Yes. Your files are processed securely and automatically deleted from our servers after conversion. We never store, share, or access your files.

Yes, Convertr works on any device with a web browser — iPhone, Android, iPad, or desktop. No app installation required.

MP3 is a lossy format that compresses audio by removing data the human ear is less likely to notice, resulting in smaller files (typically 3-10 MB per song). FLAC is a lossless format that compresses audio without any quality loss, producing larger files (15-40 MB per song) identical to the original recording. Choose MP3 for portability and FLAC for archival quality.

Upload your M4A file (common on iPhones and iTunes) to the converter above, select MP3 as the output format, optionally set your preferred bitrate (we recommend 256 or 320 kbps for high quality), and click Convert. The MP3 file will be ready to download in seconds.

For general listening, 192 kbps offers a good balance between quality and file size. For high-quality music, use 256 or 320 kbps — most people cannot tell the difference from the original. For speech or podcasts, 128 kbps is sufficient. Lower bitrates (64-96 kbps) save space but noticeably reduce quality.

Yes! Convertr supports batch audio conversion. Upload multiple files at once, select the same or different output formats for each, and convert them all in one go. Each file can be up to 1 GB.

For the best quality, use lossless formats like FLAC or WAV — they preserve the original audio perfectly. FLAC is preferred because it compresses the file to roughly half the size of WAV without any quality loss. If file size matters, AAC at 256 kbps or MP3 at 320 kbps provide excellent quality that most listeners cannot distinguish from lossless.

Upload your OGG file to the converter above, select MP3 as the output format, choose your preferred bitrate (256 kbps recommended), and click Convert. OGG files are common in Spotify downloads and Linux systems — converting to MP3 ensures playback on all devices.

Upload your WAV file, select MP3 as the target format, and choose a bitrate. Use 320 kbps for high-quality music or 128 kbps for podcasts and voice recordings. WAV files are typically 10x larger than MP3, so converting saves significant storage space.

AAC (Advanced Audio Coding) generally produces better sound quality than MP3 at the same bitrate, especially below 192 kbps. AAC is the default format for Apple devices, iTunes, and YouTube. MP3 has broader compatibility with older devices and car stereos. For most uses, AAC at 192 kbps matches MP3 at 256 kbps in perceived quality.

Yes! You can extract audio from video files by uploading an MP4, MOV, AVI, or other video format and selecting an audio output format like MP3 or WAV. Convertr will extract the audio track and convert it to your chosen format. This is great for saving music from videos or creating podcast clips.

iPhone Voice Memos are saved as M4A files. Share the recording to your computer or upload it directly from Safari on your iPhone, then use our converter to change M4A to MP3. The MP3 file will play on any device and is easy to share via email or messaging apps.

Discord uses OPUS internally for voice chat because it delivers excellent quality at very low bitrates. For uploading audio files to Discord or other chat platforms, MP3 at 128–192 kbps is the best choice — small file sizes, universal playback, and good quality for voice and music.

M4B is the standard audiobook format used by iTunes and Audible. Upload your M4B file to Convertr and select MP3 as the output format. Use 64–128 kbps bitrate for spoken word — it sounds clear and keeps file sizes small. The resulting MP3 plays on any media player or car stereo.

OPUS is an open-source audio codec designed for real-time communication. It delivers better quality than MP3 at half the bitrate — OPUS at 128 kbps rivals MP3 at 256 kbps. It is the default codec in WhatsApp voice messages, Discord, Telegram, and WebRTC. Use OPUS for VoIP, voice recordings, and low-bandwidth streaming. Convert OPUS to MP3 when you need wider device compatibility.

WhatsApp voice messages are stored as OPUS files (with .opus or .ogg extension). Export the voice message from WhatsApp to your device, then upload it to Convertr and select MP3 as the output format. Your voice message will be converted to a universally playable MP3 file in seconds.