✳ VALIDATOR · META THREADS
Subtitle validator for Meta Threads
Pick a subtitle file. Koldflux reads metadata locally and reports PASS / WARNING / FAIL / UNKNOWN against Meta Threads. Nothing uploaded.
Extension and MIME type are labels, not proof of the container. Dimensions and duration come from this browser's media reader. Files and measurements are not sent anywhere.
What this checks
- Container compatibility (does Meta Threads accept this extension)
- File size vs. Meta Threads max
- Aspect ratio vs. Meta Threads recommended
- Caption character and duration limits
Convert a failing file in one click: /tools/convert
Automate this in Koldflux