To get hashtags for a post, describe it in a few words, pick Instagram, TikTok or YouTube and press Generate hashtags. You get up to ten lowercase tags grouped as broad, niche and specific. For Instagram, five of the ten are marked as the pick, because Instagram allows up to five hashtags on a post.
A hashtag is a label: it tells anyone who searches or follows that tag what a post is about. This page writes a set of them for one post.
What you get
Up to ten hashtags, grouped from broad to specific
You describe the post and pick where it goes, and the generator writes the set in three groups: broad tags for the subject as a whole, niche tags for the community around it and specific tags for this exact post. For Instagram it writes ten candidates and marks the five to use.
What comes out:
- Up to ten hashtags. Lowercase and without spaces, ready to paste under a post or into a video description.
- Three groups. Broad, niche and specific, so the set covers the subject, its community and the post itself.
- Five marked for Instagram. Instagram allows up to five hashtags on a post, so five are marked, ready to copy in one click. TikTok and YouTube get the whole set to choose from.
The generator writes tags and nothing else: no post counts and no difficulty scores, which a language model could only guess. It leaves out bait tags such as #fyp and avoids brand names your topic does not mention.
How to use it
How to generate hashtags: three steps
Describe the post
Write what the post is about in a few words. A detail such as who it is for or what it shows makes the tags more specific.
Pick the platform
Choose Instagram, TikTok or YouTube, and a niche if you like. Press Generate hashtags.
Copy the tags
On Instagram, copy the five marked tags. On TikTok and YouTube, copy the set and keep the tags that match what the post shows.
Your first run is free, no sign-up; after that, your email lets you keep going. A new topic, platform or niche gives a new set.
The limit of five hashtags on an Instagram post is from the Instagram Help Center, checked on 6 October 2026.
Limits
Free version limits
Your first run is free, no sign-up. Leave your email to keep going, then create a free Spytrend account: it opens Content AI. A free account searches Instagram Reels by topic, with a daily limit, and lets you try a video breakdown; TikTok and YouTube results, full breakdowns and scripts come with a subscription.
One run writes one set of hashtags for one topic and one platform, in English. The same topic, platform and niche return the same set, so reword the topic or change the niche for a different one.
Why creators use it
Tags that describe each post — not one block pasted under all of them
A hashtag is useful when it says what the post is about. The usual shortcut is one saved block of tags pasted under every post, whatever the post shows, because writing a fresh set each time is the step that gets skipped.
A creator posting every day describes each Reel in a line and gets a set that matches what it shows.
An SMM specialist running accounts for several clients writes one line per post and keeps each account’s tags on its own topic.
A business owner who runs their own account posts one product video as a Reel, a TikTok and a YouTube Short, runs the topic for each platform and gets a set that fits each one.
Tags label a post you have already made. The bigger question is what to shoot next, and Spytrend’s Content AI shows what is taking off in your niche.
Go further with Spytrend
Beyond the tags: what to shoot next in your niche
This tool writes hashtags for one post. What to shoot next in your niche is a bigger question.
Spytrend is an ad intelligence platform for Facebook and TikTok advertising: ads AI-classified into 33 business categories, with every advertiser assembled into a single card — all ads, pages, domains and countries in one place.
For creators, Spytrend has Content AI. Search Reels, TikTok and YouTube videos in your niche: describe what you are looking for in words, and it finds videos by meaning, hook and scenario. Open any video to see its hook, structure and a ready-to-shoot script, and see which sounds are taking off in Reels. A free account searches Instagram Reels by topic, with a daily limit, and lets you try a video breakdown; TikTok and YouTube results, full breakdowns and scripts come with a subscription.
Two jobs where a set of hashtags is not enough
- Choosing what to shoot next. Search your topic and see which videos in your niche are taking off, before you plan the next post.
- Opening with a hook that holds. Open a video that took off to see its hook and structure, and get a ready-to-shoot script for your own account.
What you can see next to a video
- The breakdown. The video broken down by hook, scenario and retention.
- A ready-to-shoot script. A script for your own account, built from the video’s format and structure.
- The sounds. Which sounds are taking off in Reels, to choose the audio for your next video.
From a post topic to what is taking off in your niche, in three steps
- Search what you post about. Type the topic the way you described it here, or describe the video you have in mind in a few words.
- Open the videos that took off. Look for videos that beat their creator’s usual views: that says the idea worked, not just the size of the account.
- Plan your own version. Note the hook, the format and the pacing, and build your next post around them in your own words.
Why the videos, not only the tags
Tags help people find a post once it is out; the video is what makes them stay. Checking a niche account by account does not scale, so Content AI searches your niche for you and puts the videos that took off side by side.
How to start
Create a free account and search the topic you just described. A free account searches Instagram Reels by topic, with a daily limit, and lets you try a video breakdown; TikTok and YouTube results, full breakdowns and scripts come with a subscription.