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 3–15 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
- 1–15 characters. Letters, numbers, and underscores only. No periods or hyphens.
- TikTok
- 2–24 characters. Letters, numbers, underscores, and periods. No consecutive periods.
- YouTube
- 3–30 characters. Letters, numbers, underscores, hyphens, and periods.
- Bluesky
- 3–18 characters. Letters, numbers, hyphens, and underscores. Cannot start or end with a hyphen.
- Threads
- 1–30 characters. Letters, numbers, underscores, and periods. No consecutive periods or leading/trailing periods.
- Domain (.com)
- 1–63 characters. Letters, numbers, and hyphens. Cannot start or end with a hyphen.
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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 1–15 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 2–24 characters and may contain letters, numbers, underscores, and periods. Consecutive periods (..) are not allowed.
What are YouTube handle rules?
YouTube handles are 3–30 characters and support letters, numbers, underscores, hyphens, and periods.
What counts as a valid domain name?
Domain labels (before the .com) can be 1–63 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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