Hashtag Set Builder
Turn keywords into clean hashtags, remove duplicates, and check your set against each platform's real limits. Copy-ready blocks, all in your browser.
Build your hashtag set
Separate entries with commas or new lines. A multi-word entry like "gym life" becomes one tag: #GymLife.
This tool formats and checks the hashtags you bring. It does not measure popularity or trends.
Add a few hashtags or keywords above to build your copy-ready set.
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Explore ServicesHow this hashtag set builder works
This tool runs entirely in your browser on hashtags and keywords you provide. It formats each entry into a valid tag, merges multi-word phrases into one readable PascalCase hashtag ("gym life" becomes #GymLife), strips characters platforms will not link, removes case-insensitive duplicates, and rejects numbers-only tags because no major platform links them.
Limit checks use each platform's documented rules, verified July 2026: Instagram allows at most 30 hashtags per post, and YouTube ignores every hashtag on a video that uses more than 15. X, TikTok, and LinkedIn publish no hard hashtag cap; there the practical budget is the post's character limit, which the tool shows for your assembled set.
The suggested per-platform ranges shown by the tool (for example 3 to 5 hashtags on Instagram) come from the platforms' own published creator guidance. They are recommendations, not measurements; this tool has no popularity, volume, or trend data and does not pretend to.
The copy blocks are formatted for how each platform is actually used: an inline block for captions, a one-per-line block for editing, a trimmed block that fits the hard cap when your set exceeds it, and an Instagram first-comment block with leading dot lines so the caption stays clean and hashtags sit below the fold.
Frequently asked questions
How many hashtags can I use on each platform?
Instagram enforces a hard limit of 30 hashtags per post or comment. YouTube allows more, but if a video uses more than 15 it ignores all of them. X, TikTok, and LinkedIn have no documented hashtag cap, so the post's character limit is the practical constraint. The builder checks your set against these rules as you type.
Does this tool show trending or popular hashtags?
No. Real trend data requires paid platform APIs or constant crawling, and tools that show canned "trending" lists are showing fiction. This builder is honest about its job: it formats, dedupes, and limit-checks the hashtags you choose, and it links out to nothing pretending to be data.
Why did a multi-word phrase become one CamelCase hashtag?
Hashtags cannot contain spaces, so "gym life" only works as a single tag. The builder joins the words and capitalizes each one (#GymLife) because mixed-case hashtags are easier to read and screen readers pronounce them word by word, which matters for accessibility.
What is the Instagram first-comment block?
Many creators post hashtags as the first comment instead of the caption to keep the caption clean. Hashtags in a comment count toward search the same way. The block this tool builds starts with five dot lines so the tag list collapses below the fold in the comment.
Is my input uploaded anywhere?
No. The builder runs completely in your browser; your hashtags never leave your device and nothing is stored on our servers.