TikTok supports very different durations depending on the format — a 15-second Story, a 60-second ad, or a 10-minute long-form upload. This checker takes your clip’s length and tells you exactly which formats it qualifies for and by how much you would need to trim or extend to fit the rest.
How it works
Each format defines a minimum and maximum duration in seconds. The tool converts your input to total seconds and tests it against every window:
total seconds = minutes × 60 + seconds
fits format = min ≤ total ≤ maxIf your clip falls outside a window, the tool reports the gap — how many seconds you are over the maximum or under the minimum — so the fix is concrete rather than guesswork.
Format windows and tips
The checker covers short feed clips, standard and long-form uploads, in-feed ads, and Stories. Treat the long-form 10-minute ceiling as an upper bound, not a goal: completion rate drives TikTok’s distribution, so a tight clip that holds attention to the end usually outperforms a long one that loses viewers. For ads, the 9-to-15-second band is highlighted as the recommended sweet spot even though 60 seconds is allowed.