RepostitFree tool
Caption length checker
Paste one caption and see at once whether it fits TikTok, Instagram, YouTube Shorts, Facebook, X, Threads, LinkedIn and Pinterest, including hashtag limits.
Counted in your browser, nothing is sent anywhere. Apps can count emoji and links slightly differently (X counts every link as 23 characters).
Caption and character limits for every app (2026)
Limits for text you post with a video or post. Checked November 2026.
| App | Field | Character limit |
|---|---|---|
| TikTok | Caption | 4,000 |
| Caption (Reels and posts) | 2,200, max 5 hashtags | |
| YouTube Shorts | Title | 100 |
| YouTube Shorts | Description | 5,000 |
| Post or Reel caption | 63,206 | |
| X (Twitter) | Post (free account) | 280 |
| Threads | Post | 500 |
| Post | 3,000 | |
| Pin title | 100 | |
| Pin description | 800 |
One caption for every app
If you post the same video everywhere, write the caption for the strictest app you use. Keep it under 2,200 characters with 5 hashtags or fewer to fit TikTok, Instagram, YouTube, Facebook and LinkedIn; under 500 adds Threads; under 280 adds X on a free account. Put the hook in the first line, since apps cut captions after one or two lines.
Repostit cross-posts your video and caption for you: post on TikTok or Instagram as usual and it reposts to the other apps, without the watermark. Read the cross-posting guide and check your file with the video size checker.
FAQ
What is the TikTok caption character limit?
4,000 characters when you post in the TikTok app. Tools that publish through TikTok’s Content Posting API can send up to 2,200 characters, so keep cross-posted captions under that.
What is the Instagram caption limit?
2,200 characters and now a maximum of 5 hashtags per post or Reel. Only the first ~125 characters show before “more”.
How many characters can a YouTube Shorts title have?
100 characters for the title and 5,000 for the description. Hashtags in the title or description help Shorts get found.
What caption length works on every app?
Under 280 characters fits every app on this page, including X on a free account. Under 500 fits everything except free X. Put the hook in the first line, because every app cuts long captions.
Is my caption sent anywhere?
No. The checker counts characters in your browser. Nothing leaves your device.