免费在线音频转换器

Convertr 支持 40 多种音频格式，包括 MP3、WAV、FLAC、AAC、OGG、M4A、WMA、AIFF、OPUS、AC3、AMR 等。你可以在任意受支持格式之间免费转换。

是的，Convertr 100% 免费使用。没有隐藏费用，无需注册，也不限制转换次数。

使用上方转换器上传 MP3 文件，选择 WAV 或 FLAC 作为输出格式，然后点击“转换”。文件将在几秒钟内准备好下载。

在无损格式（WAV、FLAC、AIFF）之间转换会保留完整质量。转换为有损格式（MP3、AAC、OGG）时，可以通过设置比特率控制音质。较高比特率（256-320 kbps）可获得接近无损的效果。

安全。你的文件会被安全处理，并在转换完成后自动从服务器删除。我们不会存储、分享或访问你的文件。

可以。Convertr 可在任何带浏览器的设备上使用，包括 iPhone、Android、iPad 和台式电脑。无需安装应用。

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.

可以。Convertr 支持批量音频转换。一次上传多个文件，为每个文件选择相同或不同的输出格式，然后一次性完成转换。每个文件最大支持 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.

上传 WAV 文件，选择 MP3 作为目标格式，并选择比特率。高质量音乐可使用 320 kbps，播客和语音录音可使用 128 kbps。WAV 文件通常比 MP3 大约 10 倍，因此转换后可以节省大量存储空间。

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.