Free tool · runs in your browser

Hashtag Set Builder

The hashtag set builder saves named groups of hashtags in your browser so you can copy the right set for each platform in one click; sets never leave your device unless you export them.

Your saved sets

    No sets yet. Saved sets stay in this browser only.

    Back up or move your sets (JSON)

    How do you use the hashtag set builder?

    Name a set, paste its tags, choose a platform and press Save.

    1. Give the set a name you will recognize, such as "Weekly recipe post."
    2. Paste the tags. They are cleaned on save: duplicates removed, spaces and punctuation fixed.
    3. Choose the platform the set is for, so the badge can warn you if it is over the limit.
    4. Use Copy on any saved set when you post. Edit and Delete work the same way.

    Why keep separate sets per platform?

    Because the limits now differ so much: five tags on Instagram and TikTok, one topic tag on Threads, and one or two on X.

    A single master list no longer fits everywhere. A set per platform, or per platform and series, means you never paste six tags into a five-tag app or a block of tags into a Threads post. The hashtag limits guide has the current numbers.

    Set name Platform Tags
    Recipe post Instagram 5
    Recipe post Threads 1
    Recipe post X 2
    Bakery events LinkedIn 2

    How private is it?

    Completely local: the sets live in your browser's storage, and Hashtagr has no server that could see them.

    That also means they are tied to this browser on this device. Export a backup now and then. The export is a plain JSON file you can read in any text editor, and you can import it again here or on another device. Imports are checked and cleaned, and anything that is not a valid set is skipped.

    Tips for good sets

    Keep each set short, specific and current.

    • Put your branded or series tag first, then topic tags.
    • Review sets every month or two and replace tags that have drifted to other meanings.
    • Use CamelCase so every tag is readable. The formatter can fix a whole list.
    • Check any new tag with the readability checker before adding it.

    Frequently asked questions

    Where are my hashtag sets stored?

    In your browser's local storage on this device, under this site. They are not sent to Hashtagr or anyone else. Clearing site data, or using a private window, removes them.

    How do I move my sets to another device?

    Open 'Back up or move your sets', press Export, and save the file or copy the JSON. On the other device, paste the JSON and press 'Import pasted JSON', or use 'Import file'.

    Is there a limit on how many sets I can save?

    Each set keeps up to 60 tags, which is YouTube's ceiling. You can save as many sets as your browser's storage allows, which is far more than anyone needs.

    Why does a set show a red badge?

    The badge turns red when a set has more tags than the platform you chose allows, for example six tags in a set marked Instagram. You can still save it, but trim it before you post.

    Read next

    Other hashtag tools

    • Hashtag Formatter & Cleaner

      Paste messy tags or phrases and get a clean, deduplicated, CamelCase hashtag list trimmed to a platform's limit.

    • Hashtag Counter

      Counts the hashtags and characters in a caption and checks them against X, Instagram, TikTok, LinkedIn, Threads and YouTube limits.

    • Hashtag Readability Checker

      Scores a hashtag for screen-reader friendliness, ambiguous word breaks and length, and suggests a CamelCase version.