Cross-Platform Handle Checker
See if one handle works on WhatsApp, Instagram, Facebook, and more.
Type a handle to see where it works
Checked against each platform’s format rules, live, in your browser.
How it works
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Enter one handle
The name you want to use everywhere. Checking starts as you type.
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See where it works
Each platform checks the handle against its own format rules and shows the exact problem when it fails.
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Verify availability yourself
Every platform card links straight to the profile URL, so you can confirm in one tap per platform.
Every platform's rules, side by side
Each platform invented its own username rules, which is why one name can work in four places and fail in the fifth. This is the exact rule set the checker above enforces.
| Platform | Length | Allowed characters | Worth knowing |
|---|---|---|---|
| 3 to 30 | Lowercase letters, numbers, . and _ | No public profile URL by username yet. | |
| 1 to 30 | Lowercase letters, numbers, . and _ | ||
| 5 to 50 | Letters, numbers and . | No underscores, five character minimum. | |
| X | 4 to 15 | Letters, numbers and _ | Shortest limit of the lot: 15 characters, underscores only. |
| TikTok | 2 to 24 | Lowercase letters, numbers, . and _ | |
| Threads | 1 to 30 | Lowercase letters, numbers, . and _ | Handles mirror Instagram. |
| YouTube | 3 to 30 | Letters, numbers, ., _ and - | The only one that allows hyphens. |
The strategy: satisfy the strictest platform first
A handle that works everywhere has to fit inside the tightest constraint in every category. In practice that means three things. Keep it within 15 characters, because X allows nothing longer. Prefer plain letters and numbers, because X rejects periods and Facebook rejects underscores, so any separator locks you out somewhere. And keep it lowercase, because WhatsApp, Instagram, and TikTok accept nothing else.
That is why annaperez passes all seven platforms while
anna.perez loses X and anna_perez loses Facebook. When your name
cannot meet every rule at once, the summary card offers the nearest version that can, and
the per-platform cards show the best fallback for each network.
Format is checkable. Availability is not.
No tool can reliably check whether a name is free across platforms without logging into each one, and tools that claim to are guessing. What can be checked is format, which is what this tool does, and what can be made fast is manual verification, which is what the profile links are for. Two taps and you have your answer from the platform itself.
Still hunting for a name that fits everywhere? The username generator builds ideas that already pass the WhatsApp rules, the username checker shows the WhatsApp rule detail line by line, and the rules guide explains the background.
Next steps
Related guides
How to spot and stop username impersonation
How lookalike handles are built, how to make yours hard to copy, and what to do if someone impersonates you or your business.
How to use the handle checker
How to read the platform cards, add optional platforms, use the universal suggestion, and verify availability honestly.
Why your username is a brand asset
How one consistent handle compounds into recognition, what fragmenting it costs you, and a simple system for managing it.
Common questions
Does this check if the handle is available on each platform?
It checks the format rules of each platform, which is what can be verified reliably. For availability, it gives you a direct profile link per platform so you can confirm in one tap. We do not fake automated availability results.
Which platforms are covered?
WhatsApp, Instagram, and Facebook by default, with optional checks for TikTok, X, Telegram, and YouTube.
Why do platforms disagree about my handle?
Each platform has its own length limits and allowed characters. A name that is fine on Instagram can fail on WhatsApp. This tool shows you exactly where it breaks and suggests the closest variant that works everywhere.
Is my handle stored or sent anywhere?
No. All checks run in your browser.