Why this tool is useful
Add album or episode artwork to a local MP3 for players that display embedded ID3 cover images.
Local File Tools · runs locally
Add Cover Art to MP3
Embed one verified PNG or JPEG as the front cover of an MP3 entirely in the browser, replacing existing embedded artwork but preserving other tags.
Ready. Your working data stays in this browser.
Files and capture streams stay on this device. Processing uses browser APIs only; nothing is uploaded to YTSave, the media API or a proxy.
How it works
The tool requires exactly one MP3 and one signature-checked PNG or JPEG, caps the image at 10 MiB and writes a front-cover APIC/PIC frame with pinned MP3Tag.
Practical example
Choose song.mp3 and cover.png together, run the tool, then inspect the resulting MP3 in a local player before replacing any original file.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.