AI tool
Username generator
Get username ideas for Instagram or TikTok that fit each app's length and character rules, then check if they're free. Free, no sign-up.
InstagramComing soon
Soon: post it everywhere at once.
tenfeeds isn't open yet. When it opens, you'll be able to:
- Upload once, pick your platforms, and post now or schedule it.
- See which platforms your caption is too long for before anything goes out.
- Post from the dashboard, or have your AI agent draft posts for you to check.
Join and we'll email you when tenfeeds opens, only about tenfeeds. Watch the 1-min demo
How it works
How to use it
Enter a name
Your name, brand or nickname, plus what you post about if you like.
Pick a style
Playful, professional, short or creative, or a mix.
Check and copy
Each idea shows its length and whether it fits the rules. Open the profile address to see if it's free.
Tips
- Short, easy-to-spell names are easier to find and tag.
- Use the same handle on every platform if you can, so people find you anywhere.
- Avoid other brands' names. Platforms can take a name back if it infringes a trademark.
Username rules
| Platform | Max length | Characters | Notes |
|---|---|---|---|
| 30 | a–z, 0–9, . and _ | Instagram's help center says you can use letters, numbers, periods and underscores. Third-party figure. The 30-character cap is not in the help center; it is widely reported, including in Buffer's FAQ. source | |
| TikTok | 24 | a–z, 0–9, . and _ | TikTok's help center: letters, numbers, underscores and periods only, no period at the end, and you can change it once every 30 days. Third-party figure. The 24-character cap is not on the help page; Buffer and others report it. source |
Checked October 12, 2026 against each platform's help pages and developer docs. Limits change, so we recheck them regularly.
FAQ
Common questions
What characters can I use?
On Instagram: Instagram's help center says you can use letters, numbers, periods and underscores (Instagram Help Center). It doesn't publish a maximum length; 30 characters is the widely reported cap, so ideas here stay at 30 or fewer. On TikTok: TikTok's help center says usernames can only use letters, numbers, underscores and periods, and can't end with a period (TikTok Help Center). Its 24-character cap is widely reported but not on that page, so ideas here stay at 24 or fewer.
Can you tell me if a username is taken?
No. We can't see other accounts. "Check if it's free" opens that profile address in a new tab: if no account shows up, the name may be free, and the app tells you for sure when you try to save it.
Is it really free?
Yes. You can use the AI tools 10 times an hour and 25 times a day in total, without signing up. The limit keeps them free for everyone.
Which AI writes this, and do you keep what I type?
It runs on a DeepSeek model through OpenRouter, sent only to providers that keep no copy and don't train on it. We don't store or log what you type. To enforce the free limit we keep a counter tied to a scrambled version of your IP address, and it's deleted within 2 days. Details are in our Privacy Policy.
TikTok
