What is this identifier?

Paste one in. UUID, ULID, KSUID, Snowflake, ObjectId, JWT, API keys, timestamps, hashes — it tells you what it is, when it was made, and what it says to whoever reads it.

● Nothing is uploaded. This page has no server to upload it to.

Paste an identifier

or try:

Why it matters

An identifier is only opaque at a glance. A version 1 UUID carries the MAC address of the machine that made it; a Snowflake gives the millisecond and the server number; a ULID, a KSUID and an ObjectId all give the time. When those end up in a public URL, all of that goes with them.

Nothing leaves your machine

There is no network code in this page. A CI job greps for fetch, XMLHttpRequest, sendBeacon, WebSocket and hard-coded URLs, and fails the build if one turns up. That matters more than usual here: the natural thing to paste into a box like this is a token.

In a terminal

npx github:CedricPoint/whatsthisid <id> does the same thing, and takes a list.

Source on GitHub · MIT · no dependencies, no build step