Twitter User ID Lookup - Instant Account Information Finder

Last updated March 22, 2026

What Is the Twitter User ID Lookup?

The Twitter User ID Lookup tool at TechConverter.me helps you find and decode Twitter (now X) user IDs. Twitter user IDs are permanent numeric identifiers — unlike usernames, they never change even when a user renames their account. The tool converts between usernames and numeric IDs, and decodes the Snowflake structure of any user ID to reveal the exact account creation date.

Twitter / X User IDs

Twitter user IDs are Snowflake IDs that encode the account creation timestamp. Unlike usernames (which can change), user IDs are permanent identifiers. The Twitter API v2 provides user lookup by ID via the GET /2/users/:id endpoint. User IDs can be decoded to find the approximate account creation date using the same Snowflake decoding formula as tweet IDs — subtract the Twitter epoch (1288834974657ms) from the top 42 bits.

const TWITTER_EPOCH = 1288834974657n;

function decodeTwitterUserId(userId) {
  const id = BigInt(userId);
  const ms = Number((id >> 22n) + TWITTER_EPOCH);
  return {
    userId,
    createdAt: new Date(ms).toISOString(),
    timestamp: ms
  };
}