· Updated · 4 min read · By the OptimaClip team
Ideal Short-Form Video Length by Platform (TikTok, Shorts, Reels, LinkedIn, X)
Every short-form platform has a hard upload limit and a much shorter range where clips tend to perform best. The limit tells you what you're allowed to post; the sweet spot tells you what people tend to watch to the end. For clips cut from podcasts, streams and webinars, 20 to 60 seconds is a reliable starting point almost everywhere, with LinkedIn and X tolerating a little more.
Below are the ranges by platform, why they differ, and a practical way to cut one moment into versions for each app. For the full table of limits and aspect ratios, see the social video specs cheat sheet.
Length by platform
TikTok: uploads up to 60 minutes, but most clips perform best at 20–60 seconds. Longer videos can do well when they're stories or tutorials that hold attention throughout.
YouTube Shorts: up to 3 minutes, as long as the video is vertical or square. 20–60 seconds is the common sweet spot; longer Shorts need a story that keeps paying off.
Instagram Reels: up to 3 minutes for most accounts. 15–60 seconds tends to work best, and Instagram has said very long Reels may not be recommended to non-followers.
Facebook Reels: similar to Instagram Reels; 15–60 seconds is a safe range.
LinkedIn: up to 15 minutes from desktop (10 on mobile). Feed clips do best at 30–90 seconds.
X: about 2 minutes 20 seconds for standard accounts. 30–90 seconds works well.
Threads and Bluesky: 15–60 seconds performs reliably; check the apps for current maximums.
Why the sweet spots differ
TikTok, Shorts and Reels are full-screen, swipe-driven feeds, so viewers decide fast and short, tight clips get finished more often. LinkedIn and X are mixed feeds read with more intent, where a viewer will give a clear argument a little longer to land.
In every case, what the algorithm actually responds to is watch time, completion and rewatches. Length matters because it changes those numbers. A tight 45-second clip beats a padded 20-second one.
How to cut one moment for every platform
Start with the full moment (say 70 seconds). For TikTok, Shorts and Reels, cut a tight version that opens on the hook and ends on the payoff, usually 25–45 seconds. For LinkedIn and X, keep a bit more context and export 1:1 or 4:5. Keep captions burned in on every version.
OptimaClip exports each clip in 9:16, 1:1, 4:5 and 16:9 from the same cut, and schedules each version to its platform, so you don't re-edit the moment five times.
How to find your own ideal length
Sort your last 20–30 clips per platform by average percentage viewed and by shares. Note the length of the top performers. If your best clips cluster around 35 seconds, aim there, and test occasionally above and below.
Frequently asked questions
What is the best length for short-form video?
For most clips, 20–60 seconds on TikTok, Shorts and Reels, and 30–90 seconds on LinkedIn and X. The best length is the one people watch to the end.
How long can a YouTube Short be?
Up to 3 minutes, as long as the video is vertical or square.
Are longer TikToks better?
Only if they hold attention. TikTok rewards watch time, so a long video that people finish can do well, but padding hurts.
Turn one long video into a week of clips
OptimaClip finds the best moments in your podcast, stream or webinar, captions and reframes them for vertical, and schedules them to 8 platforms. Free 3-day trial with 30 credits — no card needed.