sqids

Can encode arrays of non-negative integers, allowing complex ID generation from multiple data points, as demonstrated in examples encoding [1, 2, 3].

Decodes IDs back to original numbers efficiently, enabling quick database lookups without additional storage, which is core to its design for link shortening.

Auto-generated IDs avoid common profane words and are safe for URLs, with built-in blocklist support for further customization, as shown in the examples.

Sequential input numbers produce non-consecutive IDs, preventing predictable sequences and enhancing privacy in public systems like event tracking.