Free TikTok caption generator: 5 captions with hashtags
The videosi TikTok Caption Generator writes five short captions for a video from one line about it, each with a different angle and 3 to 5 hashtags specific to the topic. Pick TikTok, Instagram Reels or YouTube Shorts and a tone; every caption shows its length against the platform's limit, such as Instagram's 2,200 characters. It is free, with no sign-up.
Free, no sign-up. Your topic is not stored.
- Free, no sign-up
- 5 angles, topic hashtags
- Length shown against the limit
Caption and hashtag limits on TikTok, Reels and Shorts
| Platform | Caption limit | Hashtags |
|---|---|---|
| TikTok | 4,000 characters in the app (TikTok's posting API allows 2,200) | No published cap; a few specific tags read best |
| Instagram Reels | 2,200 characters | Up to 5 per post (Instagram, December 2025); the API documentation still lists 30 |
| YouTube Shorts | Title up to 100 characters; description up to 5,000 | More than 60 hashtags and YouTube ignores all of them |
TikTok has not published the 4,000-character in-app limit on its own help pages; it is widely reported, and TikTok's developer documentation gives 2,200 for captions posted through its API.
How to use the TikTok Caption Generator
Describe the video
One line is enough: what happens and who it is for.
Pick platform and tone
TikTok, Instagram Reels or YouTube Shorts; funny, curious, bold, wholesome or educational.
Copy one
Each caption has a copy button and its character count. Edit it so it sounds like you.
What is the videosi TikTok Caption Generator?
A good short-video caption does two jobs: its first words make someone stop and read, and its hashtags tell the app what the video is about. The generator front-loads the first 60 characters, keeps each caption under 150 characters, and picks hashtags about the topic rather than generic ones like #fyp.
It writes text only and stores nothing. It will not write sexual, hateful or misleading posts, or engagement bait the platforms penalize. To star in the clip yourself, videosi's AI body swap on the home page keeps the original moves and camera and puts you in the lead, from one photo.
Worked example: one line, five captions
Say the topic is "I swapped myself into a 90s sitcom intro with AI", on TikTok, in a funny tone. The generator returns five angles: a question ("Would you have watched this show?"), a story, a punchline, a call to action, and a list, each ending with tags like #90ssitcom and #aivideo instead of #fyp.
Each caption shows its count, such as 96 / 4,000 characters, so a Reels or Shorts version can be checked against Instagram's 2,200 and a Shorts title's 100 before posting.
What the TikTok Caption Generator can and cannot tell you
- It writes from the line you give it and does not watch the video; check that the caption matches what happens.
- It does not know what is trending today. Add a trend's own hashtag or sound name yourself.
- Hashtag rules change: Instagram began limiting posts to five hashtags in December 2025, and the limit may differ while it rolls out.
Sources, checked November 3, 2026
- TikTok for Developers: Content Posting API, Direct Post reference
- Meta for Developers: IG User Media (caption and hashtag limits)
- Social Media Today: Instagram implements new limits on hashtag use (December 18, 2025)
- YouTube Help: Add video titles and descriptions
- YouTube Help: Use hashtags for YouTube search
Platforms change their apps and limits without notice; open the official page before a decision that depends on an exact number.
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Star in the video instead
AI body swap on videosi keeps the original moves, camera and setting and puts you in the lead, from one photo. The breakdown is free; you see the price before you pay.
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How long can a TikTok caption be?
TikTok captions can be up to 4,000 characters in the app, a widely reported limit TikTok has not published on its help pages; captions posted through TikTok's API are limited to 2,200. Short captions still work best: the first line is what people see.
How many hashtags should I use on TikTok?
TikTok publishes no hashtag cap. Three to five hashtags about the video's topic tell the app what it is about better than a long list or generic tags like #fyp, which is what the videosi TikTok Caption Generator writes.
How many hashtags can I use on Instagram Reels?
Instagram began limiting captions on posts and reels to five hashtags in December 2025, rolling out gradually. Its API documentation still lists 30, so the limit you see may depend on your account.
Is the TikTok Caption Generator free?
Yes. The videosi TikTok Caption Generator is free with no sign-up and no per-person limit. Each writing returns five captions, and the topic you type is not stored. videosi caps the free AI tools' total use per day across all visitors.
Does it work for Instagram Reels and YouTube Shorts?
Yes. Pick Instagram Reels or YouTube Shorts before writing: each caption shows its length against that platform's limit, 2,200 characters for Instagram and 100 for a Shorts title.