Free audio converter
Convert MP3, WAV, FLAC, OGG, AAC, M4A and OPUS in any direction — instantly, without uploading. Drop a file in and download the converted version in seconds.
- Files stay on your device
- No size limits, no signups
- 100% free, forever
Drop your audio file here
or click to browse a file
Supported: MP3, WAV, FLAC, OGG, OPUS, AAC, M4A, AIFF, MP4 video (audio track) and more
Output settings
Higher bitrate = better quality and bigger file.
About this online audio converter
MP3Conv is a free audio converter built on a professional-grade audio engine, so conversions are fast and accurate. No upload step, no waiting in a queue, and we don't analyse or index your file.
Convert MP3 to WAV, FLAC, OGG, AAC, M4A or OPUS — and back in any direction. The converter also handles AIFF input and the audio track of MP4, MOV and WEBM video files. Pick a bitrate from 96 kbps up to 320 kbps for lossy formats; lossless options keep every bit of the original.
How to convert audio files online
- 01
Drop your file
Drag your audio file into the box above, or click to pick one from your device.
- 02
Pick output format
Choose MP3, WAV, FLAC, OGG, AAC, M4A or OPUS. Set a bitrate when converting to a lossy format.
- 03
Convert and download
Click convert — your file is processed and ready to download in seconds.
Why choose MP3Conv
- Free and private — we don't analyse or index your audio
- No file size limits, no watermarks, no signup
- Lossy and lossless formats supported (WAV, FLAC included)
- Adjustable bitrate from 96 kbps to 320 kbps
- Works offline once the page has loaded
- Free forever — no ads inside the converter UI
Frequently asked questions
Is my file kept private?
Yes. We don't analyse or index your file, and we don't keep it.
What formats can I convert between?
MP3, WAV, FLAC, OGG (Vorbis), OPUS, AAC, M4A and AIFF — in any direction. The audio track of MP4, MOV and WEBM video files is also supported as input.
Is there a maximum file size?
There is no hard limit, but very large files (over 1–2 GB) may run into your browser's memory limits. For most music and podcast files this is not an issue.
What bitrate should I pick?
192 kbps is a great default for music. Use 128 kbps to save space for spoken word, or 256–320 kbps for high-quality archival.
Can I extract audio from a video?
Yes. Drop in an MP4, MOV or WEBM file and convert to MP3, WAV or any other audio format.
Does the converter work on mobile?
Yes. It works in Chrome, Safari, Firefox and Edge on phones, tablets and desktops. Conversions of very large files may be slower on mobile devices.
Do I need an account?
No. There is no signup, no login, and no usage limit. Open the page and convert.
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Built for privacy and speed
Every conversion is fast and private. We don't analyse, index or store your audio.
Private by design
Your files stay on your device. No upload step, no cloud storage, no tracking.
Instant start
Drag a file in and the conversion begins — no queue, no waiting.
Pro-grade engine
Powered by an industry-standard audio engine for accurate results.
Works offline
Once loaded, you can use the tools without an internet connection.