Audio Metadata (ID3) Viewer/Editor
View and edit ID3 tags (title, artist, album, artwork) on MP3 files directly in the browser.
What is ID3 Editor?
An ID3 tag editor for MP3 files: fix the wrong artist on a podcast download, add cover art to a demo, or strip metadata before sharing.
How it works
The tag is parsed straight out of the file bytes (ID3v2.2/2.3/2.4 with an ID3v1 fallback) and rewritten as a standard ID3v2.3 block with UTF-16 text — audio frames are copied unchanged, so editing is lossless and instant.
- Load your file. Drag a file onto the drop zone or pick one from your device. It is read locally by the browser and never uploaded.
- Set the options. Adjust the handles, format, quality or threshold controls — the preview updates as you change them.
- Process and download. Run the tool, then download the result. Compare the reported before/after size for compressors and converters.
Examples
A 42 MB podcast episode → 9 MB MP3
Trim the intro, normalise to −16 LUFS, and export at 96 kbps mono — a typical interview lands around a fifth of the original size.
A phone video with the wrong orientation
Rotate 90° and the width/height swap in the output, so it plays upright in every player instead of relying on metadata flags.
Common mistakes
Expecting instant encoders
Video encoding runs in single-threaded WebAssembly, so a clip takes roughly its own length (or a little longer) to re-encode. Stream-copy operations are near-instant by comparison.
Re-encoding when a copy would do
Trimming, removing audio and joining same-codec clips can copy streams without re-encoding — pick the copy option when it is offered to avoid any quality loss.
Ignoring the first-load download
The media engine is about 31 MB and is fetched on first use, then cached. The first conversion on a connection is slower than every later one.
Frequently asked questions
Does editing tags re-encode the audio?
Never. The ID3 header is replaced and the audio bytes are copied verbatim, so there is zero quality loss and no processing delay.
Which fields can I edit?
Title, artist, album, album artist, year, track, genre and comment, plus the embedded cover image. All frames in the original tag are listed, even ones the form does not expose.
Will repeated edits stack up duplicate tags?
No — the existing ID3v2 tag is removed completely and a single fresh tag is written in its place.