The best hashtag generators, and what they can't actually know
Buffer, Ahrefs and Canva run a language model. Flick and SISTRIX query their own crawl of public posts. Only TikTok's Creative Center shows numbers the platform itself publishes.
8 minute read
What a hashtag generator can actually know
One fact decides how much any of these tools is worth to you. Instagram does not publish search volume for hashtags and does not expose it through an API, so when a generator shows you a tidy number next to a tag, that number is either an estimate built from the vendor's own crawl of public posts, or it is nothing at all and you are looking at a language model producing plausible-looking words. TikTok is the single real exception, because its Creative Center publishes post counts and view counts for tags from TikTok's own data. Sorting these tools by which of those three things they are doing will tell you more than any ranked list of them, so that is how this roundup is organised.
First, the part most roundups skip
A hashtag tool roundup that does not mention this is selling you something. Instagram's head, Adam Mosseri, answering a question about hashtags, said they help the platform understand what a post is about and can make it more likely to show up somewhere like a hashtag page, but added that he would not think of hashtags as a way to get more distribution. Hootsuite reported the exchange and the position has not moved since. Instagram then removed the ability to follow a hashtag in December 2024, closing the one route by which a tag put your post in front of a stranger, and capped captions at five tags in December 2025. Confusingly, Instagram's own composer still nudges you to add relevant hashtags so people interested in those topics can find you. Both things are on the record.
Three mechanisms, and only one touches platform data
Every tool in this category does one of three things. The first is prompt a language model: you type a topic, a model returns twenty plausible tags. Ahrefs is unusually candid about this, describing its generator as a language model that learned patterns and vocabulary from large amounts of text. There is no hashtag data underneath it. The second is query a private index built by crawling public posts, which is what Flick and SISTRIX do. SISTRIX says its Instagram generator covers more than 7.7 million hashtags and over 15 billion hashtag combinations, which is a co-occurrence map: tags that keep turning up together. The third is read numbers the platform itself publishes, and only TikTok offers that. Knowing which mechanism you are looking at tells you exactly how much weight the output deserves.
The free generators are fine for what they are
Buffer's own roundup of free hashtag generators names eight tools, including Buffer's, Canva, Predis.ai, VEED, Copy.ai, Inflact, Ahrefs and SISTRIX, and several of them need no signup at all. They are genuinely useful for one narrow job: you have five slots, you cannot think of five accurate labels, and a model hands you a starting set in four seconds. Treat the output as vocabulary rather than research. It is also worth opening the link before you trust any listicle in this category, because it churns badly. Hashtagify has been discontinued and still shows up in current roundups. All Hashtag, which appears in almost all of them, currently resolves to a German hosting company's placeholder page rather than a working tool. Check the site loads before you plan a workflow around it.
What Flick's competition score is really measuring
Flick is the most established paid option, and its metrics are worth understanding before you pay for them. Flick's own documentation defines Competition Score as the number of people you will be competing against on a tag, Potential Reach as the number you are likely to reach if you rank on it, alongside a daily average post count drawn from the last seven days and the average likes and comments on posts that reached a tag's top section. Notice what all of that is anchored to: ranking in top posts on a hashtag page. That is a real surface but a shrinking one, and Instagram began pulling the recent tab from hashtag pages back in 2022. Flick has no permanently free plan either. Every tier runs on a seven-day trial and the pricing page lists three tiers in pounds.
TikTok's Creative Center is the one with real numbers
If you want data rather than estimates, TikTok's Creative Center is free, needs no ad account, and publishes trending hashtags with post volume, view counts and a trend line, filterable by region, industry and time window. It is the only tool here where the figures come from the platform instead of somebody's crawler. The limit is its shape: it is a ranked list scoped to an industry, a region and a period, not an open database you can interrogate for any tag you can think of. Pair it with Creator Search Insights inside the TikTok app, which shows what people are actually searching for and, in its content gap view, which of those searches do not yet have enough videos answering them. That is a far better use of research time than a tag list.
You can no longer check whether a tag did anything
This is the quiet reason the whole category has gone soft. Instagram post insights used to break impressions down by source, with hashtags as one of the lines, so you could at least see whether tags brought anyone in. In April 2025 Meta retired impressions and plays in favour of a single views metric across every format, and the hashtag line in that breakdown went with it. The API does not fill the gap: Meta's documentation for the hashtag search endpoint says it returns a hashtag ID, with no volume or popularity figure attached, and caps you at thirty unique hashtags in a rolling seven-day period. You can see the effect in the products themselves. Later's pricing page now lists hashtag suggestions on every tier and no hashtag analytics on any of them.
FAQ
Do hashtag generators actually work?
They work at producing relevant-looking tags, which is not the same as producing reach. Most are language models with no hashtag data behind them, and Instagram's Adam Mosseri has said he would not think of hashtags as a way to get more distribution. Use one to fill your five slots with accurate labels quickly, then stop thinking about it.
What is the best free hashtag generator in 2026?
For TikTok, TikTok's own Creative Center, because it is free, needs no ad account, and shows real post and view counts filtered by region and industry. For Instagram there is no free tool with platform data. Buffer's roundup of free options names Canva, Predis.ai, VEED, Copy.ai and Ahrefs, all of which generate plausible tags from a language model rather than researched ones.
Do any hashtag tools have real Instagram search volume?
No. Instagram does not publish it and does not expose it through an API. Meta's hashtag search endpoint returns a hashtag ID with no volume attached, and limits you to thirty unique hashtags in a rolling seven-day period. Any competition or reach score you see beside an Instagram tag is an estimate from that vendor's own crawl of public posts.
Is a paid hashtag tool worth it?
Only if you want its scheduling and analytics too. Flick, the best-known paid option, has no permanent free plan and runs a seven-day trial across three tiers. Its hashtag metrics are estimates anchored to ranking in a hashtag page's top posts, a surface Instagram has been shrinking since it started removing the recent tab in 2022. That is a lot to pay for a labelling decision.
Sources
- Instagram executive suggests hashtags don't affect reach · Hootsuite
- IG Hashtag Search - Instagram Platform · Meta for Developers
- 7 Best Free Hashtag Generators in 2026 · Buffer
- Defined: Hashtag Metrics · Flick
- Trend Discovery: Popular Hashtags On TikTok · TikTok Creative Center
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