Free Hashtag Generator

A hashtag generator turns a short description of your post into a set of relevant hashtags. Type the topic, pick LinkedIn, Instagram, TikTok or X, and this tool returns a suggested set sized for that platform, plus every tag it built from your words and up to 20 related tags. It’s free, it runs in your browser, and it asks for your email once to show results.

It’s made for founders and small B2B teams who post regularly and want tags that describe the post, not a list of the most popular words on the platform.

Key takeaways

• Hashtags are labels. They help the platform and people understand a post; they won't fix weak content.
• Fewer, specific tags beat long lists of broad ones on every platform.
• Instagram said in December 2025 it would cap captions at five hashtags, so the Instagram set is five tags.
• Always edit the suggestions. Word-based matching can add a tag that doesn't fit.
• Reuse one branded or series tag so people can follow everything you post on a theme.

How the hashtag generator works

The tool doesn’t call an AI model or scrape a platform. It follows a fixed, predictable process, so you can see why each tag appears.

1. It builds tags from your words. The topic is lowercased, punctuation is removed, and filler words (and, for, the, of, to, in, on, with, my, our, your, a, an) are dropped. From the words left, it makes:

• one tag from the first three words joined in CamelCase,
• one tag for each word longer than two letters,
• one tag from the last two words, if there’s more than one word,
• one “tips” tag from the first two words.

2. It finds related tags. It compares your words with 23 themed lists: marketing, SEO, AI, AI search, ads, email, social, leads, startup, SaaS, fintech, ecommerce, design, tech, Africa, business, health, food, travel, fashion, education, gaming and real estate. Each list has trigger words. A list matches when one of your words equals a trigger, or when a trigger longer than three letters is the start of your word (or the other way round). Tags from lists with more matching words rank higher, and up to 20 related tags are kept.

3. It sizes the set for the platform. The suggested set takes tags from your own words first, up to half the set, then fills the rest with the top related tags.

Platform	Suggested set	Tool’s guidance
LinkedIn	5	A few specific tags at the end of the post
Instagram	5	The most specific tags, within Instagram’s five-hashtag cap
TikTok	6	One or two broad tags plus specific ones about the video
X	3	One to three tags keep the post readable

These set sizes are our editorial defaults, not platform rules. The one platform limit we know has changed is Instagram’s: Social Media Today reported on 18 December 2025 that Instagram’s @creators account announced it would “gradually update the number of hashtags that you can include in a caption for a reel or post to five.” The tool’s Instagram set follows that cap: five tags, the most specific first.

How to read your results

You get three lists:

List	What’s in it	How to use it
Suggested set	Your words first, then the strongest related tags, sized for the platform	Your starting point. Edit before copying
From your topic	Every tag built from your words	The most specific tags. Good for niche reach and series tags
Related	Up to 20 tags from matching themed lists, strongest match first	A pool to swap in better tags. If it’s empty, try a broader word

If the Related list says there are no related tags, none of your words matched a theme. Add one broader word, like “marketing”, “startup” or “fintech”, and run it again.

A worked example

Topic: fintech product launch in Lagos. Platform: LinkedIn.

Step 1: your words. The tool drops in, leaving fintech, product, launch, lagos. It builds seven tags:

#FintechProductLaunch #Fintech #Product #Launch #Lagos #LaunchLagos #FintechProductTips

Step 2: related tags. Four themes match, one word each: fintech matches the fintech list, launch the startup list, product the SaaS list and lagos the Africa list. Each list’s first tag scores 10, the second 9, and so on. Tags already made from your words are removed. The top of the Related list reads #Startup, #SaaS, #AfricaTech, #StartupLife, #B2BSaaS, #Payments, #NigeriaTech.

Step 3: the set. LinkedIn gets five tags. Half of five, rounded up, is three, so the first three of your own tags go in: #FintechProductLaunch, #Fintech, #Product. The remaining two slots go to the top related tags: #Startup and #SaaS.

Suggested set: #FintechProductLaunch #Fintech #Product #Startup #SaaS

Step 4: edit. This is where your judgment matters. #Product is too broad to mean anything. #SaaS is there only because the word “product” triggers the SaaS list; if the launch is a payments app, it doesn’t fit. The place is missing, even though Lagos is the point. A better LinkedIn set:

#Fintech #FintechProductLaunch #LagosStartups #NigeriaTech #Payments

That’s one tag for the topic, one for the event, two for the place and audience, and one for the category. Every one of them came from the tool’s lists; the editing took a minute.

Hashtags won't rescue a weak post, so I spend more time on the first line than on the tags. Where they help is context: telling the platform and the reader which topic and community the post belongs to. Use the tool to get options, then cut anything you wouldn't search for yourself. Three tags that fit beat ten that don't.

Hashtag best practices by platform

Before you post

• Use tags that describe this post, not tags that are merely popular.
• Mix one or two broad tags with specific ones about the topic, audience or place.
• Put tags at the end of the post, not in the middle of sentences.
• Write multi-word tags in CamelCase (`#LagosStartups`). They're easier to read, for people and for screen readers.
• Keep one branded or series tag and reuse it, so people can follow the series.
• Check the platform's current limit, especially on Instagram.

LinkedIn. Posts are read in the feed, so a block of ten tags looks like spam to the people you want to reach. Three to five tags at the end work well. If you post a weekly series, give it its own tag and use it every week.

Instagram. Trim to five. With fewer slots, every tag needs to describe the post precisely, so drop anything generic first. Don’t try to get around the cap by moving extra tags into a comment; the point of the change is fewer, more relevant tags.

TikTok. One or two broad tags plus a few that describe what happens in the video. Your on-screen text and spoken words describe the video too, so the tags don’t have to do all the work.

X. One to three tags. Posts are short, and tags eat into the space for the message.

If you’re planning content across platforms, a social media marketing strategy decides which themes you post about in the first place. Hashtags only label what that strategy produces. For unpaid reach, see our glossary entry on organic social media.

Common hashtag mistakes

Myth vs fact

MythMore hashtags mean more reach.

FactA few precise tags work better. Instagram is cutting captions to five tags, and long lists read as spam to the people scrolling past.

MythThe most popular hashtags are the best ones to use.

FactA broad tag puts your post among millions of others. Specific tags reach fewer people who are more likely to care about the post.

MythA hashtag generator's output is ready to paste.

FactMatching on words can't judge meaning. Always remove tags that don't describe the post before you copy the set.

Two more we see often:

• Tagging every post with the same block. Platforms and people both notice. Rotate tags to match each post’s actual topic.
• Using a tag you haven’t checked. Before you adopt a new branded or series tag, search it on the platform. If it already belongs to an unrelated community, pick another.

Where to go next

Hashtags are the last step of a post, not the first. If you’re launching something, our guide on how to launch a new product covers the plan that the posts support. When you’re ready to put budget behind the posts that work, our paid ads team can help, and our lead generation service turns social attention into booked calls.