Free tool
Username Checker
Free username search across Instagram, TikTok, X, YouTube, Facebook, LinkedIn, Pinterest, Threads, and Bluesky — check one name on every network at once.
Enter one name to check it against all nine networks at once. This validates format rules — length and allowed characters — then links you straight to each profile URL so you can see what is already taken.
Claimed the name everywhere? Connect those accounts in Fuxux and post to all of them from one place — start a free trial, or check a single network with the Instagram and TikTok checkers.
Free username checker & username search across every network
This free username checker runs one username search across Instagram, TikTok, X (Twitter), YouTube, Facebook, LinkedIn, Pinterest, Threads, and Bluesky at the same time. Every network enforces different length limits and character rules, so a handle that works on Instagram can be impossible on X — this checks all nine sets of rules in one pass and links you to each profile URL to confirm what is already taken.
Claiming the same handle everywhere is worth doing before you launch. A consistent name is easier to remember, easier to search for, and it means your bio links, cross-posts, and collabs all point at something recognisable instead of three different spellings of your brand.
Once the name is yours, connect those accounts in Fuxux and publish to all of them from one calendar, with captions written per network rather than copy-pasted.
Related: Instagram name checker · TikTok username checker · Username availability guide
FAQ
How do I check if a username is available on all platforms?
Enter the name once above. The checker validates it against each network's own length and character rules, then gives you a direct profile link per platform — if the profile loads, the name is taken; if it 404s, it is usually free.
Does this tell me if a username is taken?
Not automatically. None of these networks publishes an availability endpoint, and browsers block reading their pages directly, so anyone claiming instant availability across nine platforms is guessing. This does the part that can be done accurately — the format rules, where most names actually fail — and takes you straight to the profile URL for the rest.
Why is my username valid on Instagram but not on X?
The rules differ. X requires 4 to 15 characters and allows only letters, numbers, and underscores, so periods and hyphens are out and long names are truncated. Instagram allows up to 30 characters including periods. Bluesky caps at 18 and allows hyphens but not underscores.
What should I do if the username is taken everywhere?
Use the suggestions the tool offers after a failed check. Each one is filtered so it passes the format rules on all nine networks, which avoids the common trap of claiming a name on four platforms and then finding it is impossible on the fifth.
