CUID Anatomy Visualizer
Paste a CUID or CUID2 to see its internal structure broken down into color-coded components with explanations.
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Understanding CUID Structure
CUID v1 Components
CUID v1 is 25 characters long and contains extractable components:
Prefix (1 char) - Always 'c'
Timestamp (8 chars) - Base36 milliseconds
Counter (4 chars) - Collision prevention
Fingerprint (4 chars) - Machine ID
Random (8 chars) - Extra entropy
CUID2 Structure
CUID2 (2-32 characters) uses a cryptographic hash that mixes all inputs together. Unlike CUID v1, you cannot extract individual components from a CUID2 — this is by design for better security.