§ uuid

uuid.

Two-way UUID utility. Paste any 8-4-4-4-12 hex and see what kind it is, when it was generated (v1 / v7), and whether the node MAC is real or randomized. Or generate fresh ones to drop in.

v1

60-bit timestamp + clock seq + node MAC. timestamps reach back to 1582-10-15.

v4

122 random bits. generated via crypto.randomUUID().

v7

48-bit Unix-ms timestamp prefix + 74 random bits. sortable by creation time.