The number of hashtags matters less than which ones
The era of pasting thirty hashtags under every post is over. Every major platform has quietly moved toward a small set of specific, relevant tags, and stuffing more now does nothing for reach — on some platforms it actively reads as spam. This tool exists to keep you on the right side of that line: it counts what you’ve got and checks it against each platform’s real limit, so you can trim a block of fifteen down to the five that actually describe the post. If you need help choosing those five, our hashtag generator suggests platform-tuned tags for your topic, and our guide to Instagram hashtags covers what works now.
Duplicates are the quiet slot-waster
The most common way people go over a limit is by accident: you keep a saved block of hashtags, paste it, tweak a couple, and end up repeating tags without noticing. A duplicate hashtag still takes up a slot but adds no reach, so on a platform that only wants five, a single repeat costs you a fifth of your tags for nothing. The counter separates your total from your unique count and highlights the repeats, so cleaning them up is a ten-second job — and often the easiest way to get back within a platform’s cap.
Hashtags are part of your character budget
It’s easy to forget that hashtags are just text: they count toward the caption length, and on X each one eats into the 280. A long hashtag block can quietly push a caption past a limit or shove the important words below the fold. The counter shows exactly how many characters your tags occupy so you can budget the rest of the caption around them, and our character counter measures the whole thing against every platform’s limit and fold.
Frequently asked questions
How many hashtags should you use on each platform?
Fewer than most people think, and it varies by platform. As a working guide: Instagram is now best kept to around 5 (it caps posts there); TikTok rewards 3–5, with the first tag setting how the For You feed categorises the video; X wants 1–2 at most, since more reads as spam; LinkedIn does well with 3–5 that people actually follow; YouTube takes 3–6 in the description (the first three show above the title); Facebook 2–4, mostly for branding; and Threads attaches a single topic tag. The tool checks your count against each of these live, so you don't have to memorise them.
Does Instagram really only allow 5 hashtags now?
Instagram moved away from the old 30-hashtag free-for-all and now steers posts and Reels toward a small number of highly relevant tags — around five — rather than a wall of them. Piling on more no longer helps reach and can look spammy, so the practical limit is far lower than the historic maximum. The counter flags anything over that so you can cut back to the five that actually matter for your post.
Do duplicate hashtags count?
They count against you without helping you. If you repeat the same tag, the platform still sees it occupying a slot, but the duplicate adds no extra reach — it's simply wasted. That's why this tool separates your total count from your unique count and highlights the repeats, which usually creep in when you paste from a saved block. Strip the duplicates and you often get back under a platform's limit for free.
Do hashtags count toward the character limit?
Yes — every hashtag is part of your caption, so it eats into the character count like any other text, and on X each one counts toward the 280. The counter shows exactly how many characters your hashtags use so you can budget the rest of the caption around them. If you're tight on space, our character counter measures the whole caption against every platform's limit and shows where the text folds.
Are number-only hashtags valid?
Mostly not. Instagram, for one, ignores hashtags made only of digits (#2026), so they do nothing for discovery even though they look like tags. The counter flags number-only hashtags separately so you don't count on a tag that the platform quietly drops. Mix a word in (#summer2026) and it works normally.
Is my text sent anywhere?
No. The counting and the per-platform checks all run in your browser — nothing is uploaded, there's no account, and nothing is stored when you close the tab. Paste a full caption without a second thought.