Check whether a video really contains transparent pixelsLocal-only inspection · the selected video is not uploaded and no AI provider is called
Inspect alpha metadata, the validated decoder path, real decoded pixel alpha, and exactly how much of the video was scanned. Metadata alone is never treated as proof.
Local source video
The file is copied into the browser FFmpeg Worker only for local probing and decoding.
Local detector limit: 200 MB · 60s · long edge 1920 · short edge 1080 · 30 fps
Transparency scan
Sampled detection is the default. Full detection decodes the complete supported video and does not extrapolate from samples.
Playback background check
Switch backgrounds to visually inspect playback. The formal result below still comes from decoded alpha pixels, not from how a native player happens to render the file.
Evidence layers
Sampled detection is the default. Full detection decodes the complete supported video and does not extrapolate from samples.
Safe HTML embed example
The sample uses a replaceable public URL and never copies the local blob URL or a private signed download link.
<video controls playsinline preload="metadata" style="background: transparent;">
<source src="https://example.com/your-transparent-video.webm" type="video/webm">
Your browser does not support this video format.
</video>
