Frequently Asked Questions

General

What is MetaConvert?

MetaConvert is an online MP3 converter that runs entirely in your browser. Drop in any supported audio or video file and download an MP3 seconds later — no signup, no software required.

Do I need to create an account?

No account is needed. Open the homepage, upload a file, and download the MP3. A Lifetime Supporter plan exists for those who want to support the project, but it is optional.

Supported Formats

What audio and video formats can I convert to MP3?

MetaConvert supports a wide range of input formats:

• Video: MP4, MOV, AVI, MKV, WebM, FLV, WMV, MPEG, 3GP, M4V.
• Lossless audio: WAV, FLAC.
• Compressed audio: M4A, AAC, OGG, WMA.

How do I convert MP4 to MP3 online?

Upload your MP4 file by dragging it onto the converter. The tool extracts the audio track and converts it to MP3 automatically. Click download to save the MP3 — no software installation needed.

How do I convert FLAC to MP3?

Drag your FLAC file onto the upload zone. MetaConvert processes it in your browser and outputs a standard MP3. This is useful when you need a smaller, more universally compatible file from lossless audio.

Can I convert WAV to MP3 online?

Yes. Upload your WAV file and MetaConvert converts it to MP3 in your browser. WAV files are uncompressed, so converting them to MP3 significantly reduces file size while keeping audio quality suitable for most uses.

How do I convert M4A to MP3?

Drag your M4A file onto the upload zone. MetaConvert handles M4A — the format used by Apple devices and iTunes — and converts it to widely compatible MP3 without any software installation.

Can I extract audio from a video file?

Yes. When you upload a video such as MP4, MOV, MKV, or AVI, MetaConvert extracts the audio track and saves it as an MP3. This is the fastest way to get just the audio from any video without editing software.

Usage

Can I convert multiple files at once?

Yes. MetaConvert supports batch conversion. Add multiple files at once and download them all together as a ZIP archive when conversion is complete.

Is there a file size limit?

There is no server-side file size limit because nothing is uploaded. The practical limit depends on your device's available memory. Modern phones and laptops comfortably handle multi-hundred-megabyte files.

Does MetaConvert work on mobile and tablet?

Yes. MetaConvert works in any modern mobile browser on iOS and Android. Upload files from your phone or tablet and download the converted MP3 directly to your device.

Do I need to install anything?

No. There is no app, browser extension, or desktop client. Everything runs inside the webpage.

Troubleshooting

The conversion is slow — why?

Because conversion runs on your device, speed depends on your hardware and the file size. Large video files on low-powered phones take longer than the same file on a desktop. Closing other browser tabs can help free up memory.

The output MP3 did not download automatically.

Some browsers block automatic downloads. If the download does not start, click the download button manually. Make sure your browser allows downloads from this site.

My file format is not supported — what can I do?

If your format is not listed, the file may not be playable in the browser either. Converting it first with a desktop tool such as VLC to a supported container (MP4, MKV, MOV) usually makes it work with MetaConvert afterwards.

Still Have Questions?