✳ VALIDATOR · MASTODON
Video validator for Mastodon
Pick a video file. Koldflux reads metadata locally and reports PASS / WARNING / FAIL / UNKNOWN against Mastodon. 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 Mastodon accept this extension)
- File size vs. Mastodon max
- Aspect ratio vs. Mastodon recommended
- Duration vs. Mastodon max
Convert a failing file in one click: /tools/convert
Automate this in Koldflux