Audio Metadata Remover

How to use the audio metadata remover

1. Choose an MP3 or WAV file.
2. Review what it was carrying.
3. Download the cleaned file.

About this tool

Tags are cut out at the byte level and the audio is left exactly as it was — not re-encoded, not resampled, not altered. That matters twice over: a browser cannot re-encode an MP3 at all, and re-encoding to remove text would sacrifice audio quality to delete a few hundred bytes of metadata.

For an MP3 that means locating the ID3v2 block at the front, the ID3v1 block in the final 128 bytes and any APE tag before it, then writing out only the frames between them. The ID3v2 size is stored as a synchsafe integer — seven bits per byte, so the length can never contain a byte pattern that looks like an MPEG frame header — and reading it as an ordinary integer cuts roughly 14 per cent too much, which truncates audio rather than failing visibly.

For a WAV it means keeping the format and data chunks and dropping everything else: LIST and INFO chunks, embedded ID3, broadcast extension chunks. The RIFF header's size field is rewritten to match, since a WAV whose header disagrees with its contents is a WAV some software refuses to open.

What comes out is more than a title and an artist. Audio files routinely carry the software that made them, the device or account that recorded them, timestamps, embedded artwork and, on files from download stores, a purchaser's name and email address. If you are sending a recording to someone, that is the part you did not mean to send.

Common uses

• Removing a purchaser's name and email from a bought track.
• Stripping device and software details from a recording before sharing it.
• Clearing tags before publishing audio.

Frequently asked questions

Does removing tags affect the audio?

No. The tag blocks are cut out and the audio frames are copied untouched — nothing is re-encoded, so there is no quality loss at all.

Which formats are supported?

MP3 and WAV. Other formats would need re-encoding to rewrite their metadata, which would lose quality to remove text.

What is actually in audio metadata?

Often far more than a title: the software and device used, timestamps, embedded artwork, and on purchased files the buyer's name and email address.