🔍 Free tool · No signup needed
Social Media Handle Checker
Type your brand name once. See if the handle format is valid on Twitter/X, TikTok, YouTube, Bluesky, Threads, and as a .com domain — instantly.
Platform-specific checkers
Instagram checker
30 chars, letters/numbers/underscores/periods
TikTok checker
2–24 chars, unique username rules
X / Twitter checker
1–15 chars, letters/numbers/underscores only
YouTube checker
3–30 chars, letters/numbers/underscores/hyphens/periods
Bluesky checker
3–18 chars, letters/numbers/hyphens/underscores
Threads checker
Up to 30 chars, same rules as Instagram
Platform rules at a glance
- 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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Start posting free →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 1–15 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.