Type a duration and see which platforms will take it as-is, which will reject it, and exactly how many seconds you need to lose to fit.
Unlimited — runs in your browser
How It Works
Minutes and seconds, or just seconds. However you have the number to hand.
Every major short-form surface is checked at once, with a clear pass or fail for each.
Where the video is too long, you get the exact number of seconds to remove.
Every short-form platform enforces a hard maximum, and they do not agree with each other. A 90-second video is a perfectly normal Reel, an acceptable TikTok, and too long to be a YouTube Short. Exporting once at the wrong length means re-cutting for one platform after you thought you were finished.
The limits also move. YouTube Shorts ran at 60 seconds for years and now accepts up to three minutes. TikTok has raised its ceiling repeatedly. Anything you memorised two years ago is probably wrong now, which is the actual reason a checker beats recall.
Worth separating from the limits: the maximum is not the target. Watch-through rate falls as length rises on every one of these surfaces, so the fact that you may post three minutes is not an argument for doing it. The limit tells you what will upload. It says nothing about what will be watched.
Why Use This Tool
One duration checked against all of them, rather than looking up limits one at a time.
Not just pass or fail — the exact number of seconds you are over by.
Limits change. These are maintained rather than remembered.
Pure arithmetic in your browser, no account, no cap.
Check from your phone before you upload.
Length and aspect ratio are the two specs that get an upload rejected. Both are covered here.
Reference
Hard upload limits. Sweet spots for actual watch-through are considerably shorter than every one of these.
Up to 3 minutes. It used to be 60 seconds, which is why the old number is still widely quoted. Beyond 3 minutes it is published as a regular video, not a Short.
Up to 10 minutes when you upload a file from your device. Recording inside the app is capped lower.
Up to 3 minutes. Longer videos post as regular feed video instead of a Reel.
Shorter than the limit. Watch-through falls as length rises on all of these surfaces — 15 to 40 seconds is where most well-performing clips sit, with longer only justified when the content genuinely needs it.
Regularly. Every platform here has raised its ceiling at least once in recent years, which is why this page is maintained rather than written once.
Either the upload is rejected, or the platform reclassifies it — a 4-minute vertical video on YouTube becomes a regular video, losing access to the Shorts feed entirely.
If you are trimming to fit a limit by hand, you are doing per-platform work on every export. ShortsHero sizes each clip to the platform it is going to, so the length question is answered before you ever see the file.
Export at platform specFree to start · No credit card required
Keep Going
Estimate video file size from bitrate, resolution and duration before you export. Checks the result against TikTok's 287.6MB upload cap. Free and instant.
Free video aspect ratio calculator. Enter your source size for exact 9:16, 1:1, 4:5 and 16:9 dimensions, plus how much of the frame each crop throws away.
Find the right export bitrate for any resolution and frame rate. Recommended settings for YouTube, TikTok, Reels and Shorts — free and instant.
Enter your recording length and format to see how many short clips it realistically contains, how many editing hours that costs by hand, and the cost per clip.
1m 30s fits 6 of 6 platforms.
YouTube Shorts
Limit 3m 0s · Longer uploads publish as a regular video, not a Short
TikTok
Limit 10m 0s · File upload limit; in-app recording is capped lower
Instagram Reels
Limit 3m 0s · Longer uploads become regular feed video
Facebook Reels
Limit 1m 30s · Hard cap
X / Twitter (free)
Limit 2m 20s · Paid tiers allow considerably more
Limit 10m 0s · 10 minutes for native video
These are upload limits, not targets. Watch-through rate falls as length rises on every one of these surfaces, so fitting inside a three-minute cap is not an argument for using it — most clips that perform sit between 15 and 40 seconds. Limits last reviewed September 2026.