What is squid?

sqUID is a tiny JavaScript tool that generates unique identifiers, those short strings apps use to label things like database records, user sessions, or messages. Instead of following the standard UUID format (which produces long, unwieldy strings), it creates IDs that are shorter, more readable, and still extremely unlikely to collide with each other. The way it works breaks down into a few simple pieces stitched together with dashes. First, it grabs the current timestamp in milliseconds. Then it adds a counter that increments by one each time you generate an ID, so even two IDs created in the same millisecond come out different. Only if your app somehow generates ten million IDs in a single millisecond, or the JavaScript runtime hiccups in a way that throws off the counter, does it fall back on a random alphanumeric string to keep things unique. The idea is to lean on predictable mechanisms first and use randomness only as a last resort, rather than betting everything on JavaScript's random number generator. A developer might reach for this when building a web app that needs to tag records or events with identifiers and doesn't want the overhead or visual clutter of standard UUIDs. For example, if you're building a chat application and need to assign an ID to every message, or a form tool that creates a reference number for each submission, something like this keeps things compact. You can also add a custom prefix (like your app name) and control the length of the random portion at the end. The main tradeoff is scope. As the README plainly states, this tool is designed for use within a single application. If multiple independent apps each generate IDs on their own and later try to combine everything, collisions become far more likely. So it's a practical choice for internal app use, not a drop-in replacement for a globally standardized ID system across organizations.