Problem Template
M3U8 will not open: check URL, CORS, token and encryption first.
The fastest path is not another article. Run a quick check, then route failed states into the Workspace diagnostic panel.
Core Tool Template · real feedback
Quick check the failing playlist
This browser-side check does not pretend to bypass CORS or encryption. Browser limits are shown as partial / failed states.
Cause table
| Symptom | Likely cause | Next action |
|---|---|---|
| 403 / token expired | Signed URL expired or hotlink protection. | Refresh token and test from allowed origin. |
| CORS error | Browser cannot fetch playlist or segments. | Use server-side proxy/plugin flow; do not claim browser success. |
| Black screen | Unsupported codec, encrypted key, or missing segment base URL. | Inspect tags and segment URLs in Workspace. |
Fix steps
Confirm the copied link ends with .m3u8 or paste raw #EXTM3U.
Check if segment URLs are relative and need a base URL.
Look for #EXT-X-KEY before promising download or conversion.
If browser fetch fails, mark it browser-limited, not success.