Social Media Handle Checker
Type your brand name once. See if the handle format is valid on Instagram, Twitter/X, TikTok, YouTube, Bluesky, Threads, and as a .com domain, instantly.
A handle that works everywheremust fit every platform's rules at once. The practical safe zone is 3 to 15 characters using letters and numbers only (X/Twitter caps length at 15; underscores fail as a .com domain). Check one name against Instagram, TikTok, X, YouTube, Bluesky, Threads, and .com format at once here, then confirm availability on each platform directly, because no third-party tool can guarantee real-time availability.
Rules last verified: July 2026
Platform-specific checkers
Platform rules at a glance
- Up to 30 characters. Letters, numbers, underscores, and periods. No consecutive periods or leading/trailing periods.
- Twitter / X
- 1 to 15 characters. Letters, numbers, and underscores only. No periods or hyphens.
- TikTok
- 2 to 24 characters. Letters, numbers, underscores, and periods. No consecutive periods.
- YouTube
- 3 to 30 characters. Letters, numbers, underscores, hyphens, and periods.
- Bluesky
- 3 to 18 characters. Letters, numbers, hyphens, and underscores. Cannot start or end with a hyphen.
- Threads
- 1 to 30 characters. Letters, numbers, underscores, and periods. No consecutive periods or leading/trailing periods.
- Domain (.com)
- 1 to 63 characters. Letters, numbers, and hyphens. Cannot start or end with a hyphen.
Happy with your handle? Post everywhere with Postlia.
Handle checker questions
What does this tool check?
Postlia validates your handle against each platform's format rules: length limits, allowed characters, and structural constraints like no consecutive periods. We do not query platform servers, so we cannot confirm whether a handle is already registered.
What are Twitter/X username rules?
X usernames must be 1 to 15 characters and can only contain letters, numbers, and underscores. No periods, hyphens, or spaces are allowed.
What are TikTok username rules?
TikTok usernames must be 2 to 24 characters and may contain letters, numbers, underscores, and periods. Consecutive periods (..) are not allowed.
What are YouTube handle rules?
YouTube handles are 3 to 30 characters and support letters, numbers, underscores, hyphens, and periods.
What counts as a valid domain name?
Domain labels (before the .com) can be 1 to 63 characters using letters, numbers, and hyphens. They cannot start or end with a hyphen. This tool checks the .com label only.
Why does a handle pass here but fail on the platform?
This tool checks format validity only. A handle can be correctly formatted but already taken, reserved, or blocked by the platform. Always verify directly on each platform after passing our format check.
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