ID3 Version Converter inspects the real ID3 header of your MP3 files and converts their tags between ID3v1, ID3v2.3 and ID3v2.4 in batches. A lightweight Linux alternative to Kid3 for converting ID3v1 tags to ID3v2 and moving files between ID3v2.3 and ID3v2.4.

Key Features:

• Library scan: shows on-disk ID3v2 version (2.2 / 2.3 / 2.4), tag size, ID3v1 footer presence, frame count, title, artist and album for every MP3, plus a frame viewer (real frame IDs such as TYER or TDRC).
• Convert ID3v2 to 2.3 (widest player compatibility) or 2.4 (UTF-8), with proper frame translation (for example TDRC to TYER/TDAT/TIME), optionally refreshing an ID3v1 footer.
• Copy ID3v1 to ID3v2 (fill missing frames), write ID3v1 from ID3v2, remove ID3v1 or ID3v2 tags.
• Every change is verified by re-reading the file; originals are backed up first and the last batch can be restored.
• CSV report export, bilingual (Vietnamese / English) donate bar. Powered by the mutagen library.

Notes: works on files on your own disks only. Make a backup of irreplaceable files before bulk edits.

Disclaimer: This project is an independent open-source tool and is not affiliated with, sponsored by, or endorsed by the Kid3 project or its authors.