UUID v3 Generator

import { v3 as uuidv3 } from 'uuid';

const id = uuidv3('example.com', uuidv3.DNS);
console.log(id); // 9073926b-929f-31c2-abc9-fad77ae3e8eb

Uses the uuid package from npm. Browsers and Node.js have no built-in v3.

import uuid

id = uuid.uuid3(uuid.NAMESPACE_DNS, 'example.com')
print(id)  # 9073926b-929f-31c2-abc9-fad77ae3e8eb

The uuid module ships with Python.

import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.util.UUID;

UUID ns = UUID.fromString("6ba7b810-9dad-11d1-80b4-00c04fd430c8"); // DNS
byte[] name = "example.com".getBytes(StandardCharsets.UTF_8);
ByteBuffer buf = ByteBuffer.allocate(16 + name.length);
buf.putLong(ns.getMostSignificantBits());
buf.putLong(ns.getLeastSignificantBits());
buf.put(name);
UUID id = UUID.nameUUIDFromBytes(buf.array());
System.out.println(id);

Built into Java. nameUUIDFromBytes has no namespace argument, so put the 16 namespace bytes in front of the name to match other tools.

import "github.com/google/uuid"

id := uuid.NewMD5(uuid.NameSpaceDNS, []byte("example.com"))
fmt.Println(id)

Uses the widely used google/uuid package. NewMD5 makes a v3.

use Ramsey\Uuid\Uuid;

$id = Uuid::uuid3(Uuid::NAMESPACE_DNS, 'example.com');
echo $id->toString();

Uses the ramsey/uuid package from Composer.

CREATE EXTENSION IF NOT EXISTS "uuid-ossp";

SELECT uuid_generate_v3(uuid_ns_dns(), 'example.com');

Needs the uuid-ossp extension, which ships with PostgreSQL.