Free tool by DCAST
Embed Checker
Paste a video embed link and/or a chat embed link. Each preview opens in its own frame at its own size, so video proportions stay honest — tweak width and height on the fly.
Video and chat embed links
Two independent preview frames — one for video, one for chat. Each has its own width and height controls so you can match the exact <iframe> size you plan to ship.
How to use
Enter your video embed URL (e.g. watch-embed) in the first field and your chat embed URL (e.g. chat-embed) in the second. Each one previews in its own iframe at the exact width and height you choose — defaults match a 16:9 video frame at 810×456 alongside a 316×456 chat column, and the embedded content always stretches to fill its frame. Tweak the size numbers live to verify how your embed will look on your own site. Also available at dcast.pro/embed-checker.