Audio Metadata Viewer - ID3 Tag & Audio File Info Reader

An audio metadata viewer reads the hidden information inside your audio files. It shows ID3 tags like title, artist, album, year, genre, track number, comments, lyrics, plus embedded cover art and technical info such as duration, bitrate, sample rate, channels, bit depth, codec, and whether the file is lossless. This tool does it entirely in your browser for MP3, FLAC, M4A, WAV, OGG, and Opus.

MP3 with ID3v2.2, ID3v2.3, ID3v2.4 and ID3v1 / ID3v1.1, FLAC with Vorbis comments and FLAC PICTURE blocks, M4A / MP4 / AAC with iTunes ilst atoms including covr, WAV with LIST INFO and embedded ID3, OGG Vorbis, OGA, and Opus with OpusTags. Even if a format is uncommon, technical properties like duration and sample rate are still extracted when possible.

Yes. WAV files can store metadata in a LIST chunk with INFO sub-chunks like INAM (title), IART (artist), IPRD (album), ICRD (year), IGNR (genre), ICMT (comment), and even an embedded id3 chunk with full ID3v2 tags. Many apps ignore it, which is why people think WAV has no metadata. This viewer parses LIST INFO, bext, and id3 chunks so you can actually see it.

WAV INFO is limited. To add proper metadata, use a dedicated audio tag editor: 1) For broad compatibility, write LIST INFO fields (INAM, IART, IPRD) and also write an id3 chunk so modern players read it. 2) For long-term archiving, convert to FLAC or BWF (Broadcast WAV) which has a bext chunk for description, or keep a sidecar JSON. This viewer is read-only so you can verify what was written - drop the edited WAV and check the Raw Tags tab for INFO and ID3 sources.

No. All parsing uses ArrayBuffer, DataView, and TextDecoder directly in your browser. The file never leaves your device, there is no upload, no server log, and no file size limit except your browser memory. You can disconnect from the internet after loading the page and it will still work.

The file is likely untagged, uses an unsupported tag location, or only has file-system metadata that is not embedded. Some DAWs write metadata only to their project file. Some WAV recorders write only bext. Try checking Raw Tags with no filter, and check Technical to confirm the format. If you expected ID3 tags on an MP3, ensure the exporter was set to write ID3v2.3.

ID3v1 is 128 bytes at the end of an MP3 file with fixed 30-character fields and 1-byte genre. ID3v1.1 adds a track number. ID3v2 is at the start, variable length, supports Unicode (UTF-8 / UTF-16), long values, TXXX custom fields, COMM comments, USLT lyrics, APIC cover art, and many more frames. This tool shows both versions and warns if ID3v1 title differs from ID3v2 title.

Yes. MP3 APIC/PIC frames, M4A covr atoms, and FLAC/OGG METADATA_BLOCK_PICTURE are decoded to data URLs. You see picture type like Cover front, mime like image/jpeg, size, and description. Use the Download button to save as JPG/PNG/WebP with the correct extension. You can also copy the data URL.

This tool is intentionally read-only to keep it private and safe. It focuses on accurate viewing, conflict detection, and export. To edit, use a dedicated tag editor like Mp3tag, Kid3, Picard, or Yate, then re-drop the file here to verify. You can export JSON or CSV to audit your library before batch editing.

Drop multiple files at once. Select any file to view in detail, then scroll to Batch Compare. It builds a table of every common key like title, artist, album, year, genre, track, disc, plus duration and format side-by-side, so you can spot missing or inconsistent tags before release.

Very accurate when the container provides it: FLAC STREAMINFO total samples / sample rate, MP4 mvhd timescale, OGG last granule, WAV data chunk / byteRate. For MP3 CBR we estimate from file size and first frame bitrate. For VBR we read Xing/Info header with total frames and total bytes for exact duration and average bitrate. If no header exists, we show estimated bitrate and flag it in warnings.