Desktop only

Engineering tools are available only on desktop screens.

UUID generator

Generate UUID v4 (random), v7 (time-ordered, ideal as DB primary keys), or Nil. Bulk output in several formats — uppercase, no-dash, braces.

128-bit layout UUID v4

Version

Format

Quantity

Engineering notes

v4: 122 random bits → ≈5.3×10³⁶ unique IDs. Use everywhere unless you need ordering.
v7: 48-bit Unix ms timestamp + 74 random bits. Sortable, index-friendly, no MAC leak.
v1 (deprecated): leaks MAC address — avoid.

Hash collisions: 50% chance after ~2.7×10¹⁸ v4 IDs. Practically zero.
Store as 16 raw bytes (UNIQUEIDENTIFIER / BINARY(16)) — saves vs 36-char string.

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