Audio Metadata Viewer
Codec, bitrate, sample rate, channels, tags, and cover art of an audio file — read in your browser, nothing uploaded
Click or drop an audio file hereChoose an audio file
About Audio Metadata Viewer
Audio Metadata Viewer reads the technical report of one audio file with ffprobe, the probing part of ffmpeg, compiled to WebAssembly. You get the container, duration, and overall bitrate; for each stream the codec and profile, sample rate, channels and layout, bit depth and sample format; the container's tags such as title, artist, and album (OGG and Opus files keep theirs inside the stream: see the JSON report); chapters; and the cover picture. Files your browser cannot play, such as WMA or AMR, still get a full report. A second button writes a copy of the file without its tags, chapters, and cover, with the sound copied unchanged.
How to read an audio file's metadata
- 1Pick or drop an audio file such as MP3, WAV, M4A, FLAC, OGG, Opus, WMA, AIFF, or AMR.
- 2The report shows once ffprobe has read the file; on your first visit the page also fetches the reading engine, about 10 MB.
- 3Look through "General" and each "Stream", plus "Tags" and "Chapters" if the file carries them.
- 4Keep the report: "Copy full report (JSON)" puts it on the clipboard, "Download" saves it as a .json file.
- 5For a tag-free copy of the song, press "Remove the metadata (no re-encoding)" and save what appears.
Formats and limits
- Input formats
- MP3, WAV, M4A, AAC, FLAC, OGG, OGA, Opus, WMA, AC3, AIFF, AIF, AMR, MKA, WEBA, CAF, MP2, M4B, M4R, WV, AU
- Report
- Shown in sections, with every field ffprobe returns available as JSON
- Clean copy output
- Same format as the source, audio streams only, without tags, chapters, or cover picture
- Maximum file size
- Report: set by your browser, since the file is read from disk in pieces. Clean copy: 750 MB on a computer, 300 MB on a phone or tablet.
Where your file is processed
ffprobe and ffmpeg run on this page as WebAssembly, fetched from unpkg.com the first time. They read your audio straight from disk and write the clean copy in the browser tab; the file and its tags are not sent to any server. If making the clean copy fails, its error message, stripped of your file name, reaches our error log with the tool name and your browser's name and version.
Frequently asked questions
Can I edit the tags?
No, not yet. You can only remove them: "Remove the metadata (no re-encoding)" writes a copy without its tags (title, artist, album, comment, and encoder), chapters, or cover picture. The sound itself is copied, not re-encoded, so its quality does not change.
Does it show the bit depth?
Yes, when the file stores one, as WAV, FLAC, and ALAC files do. Lossy formats such as MP3 store none, so the "Bit depth" row is left out for them while the codec and bitrate are still shown.
How large an audio file can it read?
Any size for the report: ffprobe reads the file from disk in pieces and never loads it whole. The clean copy is different: above 750 MB on a computer, or 300 MB on a phone or tablet, the page refuses, because the browser tab has to hold the whole new file.
Does a missing Tags section mean the file has no tags?
No, not always. The "Tags" section lists the container's tags, as MP3, M4A, and FLAC store them. OGG and Opus files keep their tags inside the audio stream, which that section does not list; "Copy full report (JSON)" shows them.
Tips and tricks
- ✓Check the real bitrate here before using Compress Audio, which stays at or below it when it can read it.
- ✓Make a clean copy before posting a recording whose tags name you or your device.