Processing method
- Read the ID3 header and supported frames.
- Show the exact fields and embedded-art state.
- Build a new tag and append the unchanged MP3 audio stream.
- Download a new file and reopen it when verification matters.
METADATA / WRITE WITH A VISIBLE DELTA
Read the existing frames first, change only the fields you choose, then export a new MP3 and keep the encoded audio untouched.
Browser-local processing only. A new MP3 is always downloaded; your source is never overwritten.
METHOD / LIMITS / CHECK
FAQ / TRUST
No. The current workspace reads and processes the selected file in browser memory.
No. Every change exports a new file; the selected source stays untouched.