Instagram
TikTokThe rules, network by network
What each network says on its own pages, read on 2 November 2026.
| Network | Length | Characters |
|---|---|---|
| TikTok | 2 to 24 characters | Letters, numbers, underscores and full stops; no full stop at the end |
| Not published; 30 characters is widely reported | Not listed; full stops, numbers and underscores are named in Instagram's help |
How to see if a name is taken
- Choose Open next to the network. The profile page opens in a new tab.
- If a profile shows, the name is taken.
- If the page says it isn't available, the name may be free, but it isn't proof: a name can be held by a suspended, deactivated or inactive account.
- The sure way is to try the name when you create the account or change your username on the network.
Once you have the name, write the bio and the first post. The caption length checker shows where a text runs past each network's limit, and in Unisenda you write the post once and schedule it to Instagram, TikTok and the other networks.
Questions people ask
Does this tell me if a username is free?
No. That would mean asking Instagram or TikTok, and this tool makes no calls to either. It checks the name against each network's rules, then opens the profile page for you to look at. A profile there means the name is taken; only trying the name on the network settles it.
Why are Instagram's rules marked as reported?
Instagram's help pages don't list a length or the characters a username can have. They only say you can add full stops, numbers or underscores to find a name that isn't in use. The 30-character limit and the letters, numbers, periods and underscores are widely reported, so the checker uses them as a guide.
What are TikTok's username rules?
TikTok says a username has 2 to 24 characters and can only contain letters, numbers, underscores and full stops, but a full stop can't come at the end. You can change it once every 30 days, and it also changes your profile link.
Why can a name be taken when its page looks empty?
TikTok says a username can be unavailable because it is taken, or claimed by a suspended or deactivated account that may not be available straight away. Instagram's help says the same kind of thing about inactive accounts that hold a name.
Is the name I type saved or sent anywhere?
No. The checker runs in your browser. The name isn't sent to Unisenda, Instagram or TikTok until you open a profile page yourself.
Sources
Checked on 2 November 2026. Networks change their rules, so check the source before you rely on a point.
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