AI Hook, Caption & Hashtag Generator
Hooks, captions and hashtags in seconds. Describe your video in one sentence and get AI-generated, SEO-optimized, copy-paste-ready copy for TikTok, Instagram Reels, YouTube & YouTube Shorts — modeled on what's already going viral in your niche. No prompts to write, no settings to configure.
YouTube & YouTube Shorts are available on Pro & Business plans. Upgrade
How it works
- 1
Pick a platform
Choose TikTok, Instagram Reels, YouTube, or YouTube Shorts. Each one gets copy tuned to how that platform's audience actually watches, scrolls, or searches.
- 2
Describe your video in one sentence
No prompt engineering. Just a plain-language summary of what the video shows or teaches.
- 3
Copy your hooks, captions & hashtags
Get two hook options (two video titles on YouTube), two caption options, and a ready-to-paste hashtag or tag set — modeled on patterns from content that's already going viral.
Generators by platform
- TikTok Hook GeneratorDescribe your video in one sentence and get two hook options written for the moment that decides everything on TikTok: the first three seconds.
- Instagram Caption GeneratorOne sentence about your Reel, two captions back, each written to be read and to be found.
- YouTube Shorts Hashtag GeneratorDescribe your Short in one sentence and get hooks, a description, and a tag set written for how YouTube classifies video.
- YouTube Title GeneratorDescribe your video in one sentence and get two video titles, a description, and a tag set written for how YouTube search actually ranks a video.
- AI Hashtag GeneratorOne sentence about the video, one hashtag set that fits the platform you are actually posting to.
- Instagram Reels Hook GeneratorDescribe your Reel in one sentence and get two opening lines built to stop a thumb in the Reels tab, plus the captions and hashtags to post with them.
- TikTok Caption GeneratorOne sentence about your video, two captions back: short, in your voice, and written with the words people actually type into TikTok search.
- YouTube Tag GeneratorDescribe your video in one sentence and get a ready-to-paste tag set that actually uses YouTube's tag box, specific terms first and broad ones after.
- TikTok Hashtag GeneratorDescribe your video in one sentence and get a five-tag set built for TikTok: the tags about your video first, the broad reach tags after.
- Instagram Hashtag GeneratorInstagram now allows five hashtags per post. Describe your Reel or post in one sentence and get the five worth using.
- YouTube Description GeneratorDescribe your video in one sentence and get the part of the description that matters most: an opening line people and YouTube both read, with three hashtags under it.
Frequently asked questions
What is ViralSharky?
ViralSharky is an AI hook, title, caption, and hashtag generator for video creators. You describe a video in one sentence and get copy-paste-ready hooks, captions, and hashtags for TikTok, Instagram Reels, and YouTube Shorts, plus video titles, a description, and a full tag set for a regular YouTube upload — every result is SEO-optimized, built around the keywords and phrasing that actually surface in each platform's search and recommendation feeds, so your video gets discovered as well as watched.
Is ViralSharky free to use?
Yes. Every visitor gets 3 free credits every day — no account, no card, and no sign-up required. A paid plan is what adds the extras: a far larger credit allowance, YouTube and YouTube Shorts alongside TikTok and Instagram Reels, and a saved history of your past results so you can revisit and reuse anything you have generated.
Do I need to write prompts or configure any settings?
No. There's no prompt writing or configuration. Pick a platform, describe your video in a sentence, and generate — ViralSharky handles the rest.
Which platforms does ViralSharky support?
TikTok and Instagram Reels are available on every plan. YouTube and YouTube Shorts are two separate options, both included on the Pro and Business plans. YouTube Shorts returns hooks, a description, and tags; regular YouTube returns two video titles, a description, and the same tag set.
How are the hooks and captions generated?
ViralSharky generates hooks, captions, and hashtags modeled on patterns from content that's already performing well on each platform, so results are tuned to what tends to earn watch time rather than generic AI phrasing.
How much does ViralSharky cost?
The free plan is $0 and needs no account. Pro is $13.99 per month and adds 500 credits per month, YouTube and YouTube Shorts, and saved history. Business is $39.99 per month with 3,000 credits and priority generation. Both paid plans are cheaper billed yearly.
Does ViralSharky work in languages other than English?
Yes. Write the description in any language and every hook, caption, title, and hashtag comes back in that same language, including the broad reach hashtags. A Spanish description gets Spanish hashtags, not English ones bolted underneath.
Who is ViralSharky for?
Creators, social media managers, and small brands who post regularly and would rather spend their time filming than staring at an empty caption box. It is built for people who post to TikTok, Instagram Reels, YouTube Shorts, and YouTube.
From the blog
- How many hashtags should you use on TikTok?Three to five, chosen on purpose. Here is what each slot is for, what #fyp really does, and why a TikTok habit copied from Instagram, or the other way round, now goes wrong.
- How to write a YouTube description people and search both readMost of a YouTube description is never seen. The opening lines are seen by everyone, and they are the part most channels fill with links. Here is the layout that works, with a template.
- Instagram SEO: how to get your Reels and posts found in searchPeople search Instagram for recipes, places, products, and how-tos, and the results are not random. Here is what Instagram reads, and what to change so the right searches find you.