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UUID Checker (Minecraft)

Paste a Minecraft UUID (with dashes or 32 hex characters) to validate it and convert it to the exact format you need for plugins, configs, and logs. This tool runs fully offline (no name-to-UUID lookup).

Category: Developer · URL: /tools/uuid-checker-minecraft.html
Tip: Minecraft/Mojang UUIDs are commonly shown both with and without dashes. This tool does not query Mojang APIs.


  

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            Privacy: runs locally in your browser. No uploads, no tracking scripts.
          

        

      


      
    


    

      
How to use

      
Use it to validate and normalize a Minecraft UUID string.
  1. Paste a UUID (dashed) or 32 hex characters (no-dashes) into the input.
  2. Click Check to validate and see version/variant plus both formats.
  3. Use Copy dashed or Copy no-dashes for your config/plugin.

      

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        Secondary intents covered: Validate whether a string is a valid UUID usable for Minecraft configs/plugins, Convert a UUID between dashed and 32-character no-dashes formats, Normalize UUID casing to lowercase for consistent storage, Identify UUID version (v1–v5) and variant (RFC 4122, Microsoft, etc.), Copy the correct UUID form quickly for server commands or config files, Troubleshoot “invalid UUID” errors in Minecraft plugins and mod configs, Confirm whether an ID from logs looks like a proper UUID
      

    


    

      
FAQ

    
What UUID formats does this Minecraft UUID checker accept?
It accepts standard dashed UUIDs (8-4-4-4-12) and 32-character hex UUIDs without dashes.
Is a Minecraft UUID always UUID v4?
Most modern Mojang player UUIDs are v4, but the tool reports the actual version nibble it finds.
Why do some plugins want a UUID without dashes?
Some configs store Mojang UUIDs as 32 hex characters; this tool outputs both dashed and no-dashes forms.
Can this tool convert a Minecraft username to a UUID?
No—this page does not call Mojang APIs, so it can’t resolve usernames. It only validates and reformats UUID strings you already have.
What does UUID variant mean and which one should Minecraft use?
Variant describes the UUID layout; typical Mojang UUIDs are RFC 4122 (10xx). Non-RFC variants may be rejected by some tools.
My UUID shows “uncommon version nibble” — is it invalid?
Not necessarily; it means the version digit isn’t 1–5. Some systems still treat it as a 128-bit identifier, but strict UUID validators may reject it.
Does this tool change my UUID content when normalizing?
No, it only removes/adding dashes and normalizes casing; the underlying 32 hex characters stay the same.