Video spec checker

01

Why one video fails on some platforms

Every platform sets its own limits, and they differ more than you'd think. The same two-minute vertical clip is a valid Short, a valid TikTok and a valid Reel, and too long for a Facebook Reel, which stops at 90 seconds when posted through the API.

The checker reads your file in the browser, length, resolution, file size and format, and compares it with each platform's published developer specifications. Nothing is uploaded.

02

The limits at a glance

YouTube accepts up to 256 GB or 12 hours, whichever is less; over 15 minutes you need a verified account. A vertical or square video up to 3 minutes is filed as a Short. TikTok's posting API takes videos up to 10 minutes and 4 GB, each side between 360 and 4,096 pixels, at 23–60 fps.

Instagram Reels: 3 seconds to 15 minutes, up to 300 MB, MP4 or MOV, at most 1,920 pixels wide, 23–60 fps, with 9:16 recommended. Facebook Reels: 3 to 90 seconds, at least 540×960, 24–60 fps. LinkedIn: 3 seconds to 30 minutes, 75 KB to 500 MB, MP4.

03

What the browser can't measure

A browser can read a video's length and size, but not its frame rate or codec. Those rows say “check in your editor” instead of showing a green tick. If the length shows as unknown, your browser probably can't play the codec; the platform may still accept the file.

04

One upload, every platform

If the same clip goes to several platforms, the strictest limit wins: 9:16, MP4, under 90 seconds and under 300 MB passes all six. Check it once here, then upload it once to Uplonic and schedule it to every platform with its own caption.