M3U File Inspector
Open a file to see its structure: the header, each entry, and any lines that do not follow the format. The check is structural only. It does not contact any stream.
Inspect an M3U file
Read-only. Runs entirely in this browser tab.
How to read the results
The header shows whether the first non-empty line is #EXTM3U. The counts
show how many lines are entries, how many are #EXTINF metadata lines and how
many are other tags or comments. Each issue is listed with its line number so you can find
it in your text editor.
A file that passes the structural check can still fail in a player, because players differ in which tags they support. The inspector reports only what it can confirm from the text itself.
For background on the format, read what an M3U file is and the anatomy of an M3U file.
Using the inspector
- Choose a file with the file picker, or paste the text of a playlist into the box.
- Read the header result first. A file that does not start with
#EXTM3Uis still checked, but the result tells you that the extended header is missing. - Scan the entries list. Each row shows the line number, the title from the metadata line where one exists, and the address line that follows it.
- Check the issues list last. Fix the lines it names in your editor, save the file, then inspect it again.
The inspector does not change your file. Save any corrected copy with your editor, so that the original remains available for comparison.
What the inspector does not check
The tool reads only the text you give it. It does not open the addresses in the file, check whether a stream is online, verify that a media file exists on disk, or confirm that you have the right to use the content. A clean result means the structure looks correct, not that every entry will play.