What is a Snowflake ID?

A Snowflake ID is a 64-bit integer that packs a millisecond timestamp, a machine/worker identifier, and a per-millisecond sequence number into a single sortable number. Twitter created the format; Discord adopted the same bit layout with its own epoch.

Why do I need to pick Discord or Twitter/X?

The timestamp bits store milliseconds since a custom epoch, not since 1970. Discord's epoch is 2015-01-01, Twitter's is 2010-11-04. Decoding with the wrong epoch shifts the date by roughly 4 years and gives a wrong answer even though the math "works".

Is my ID sent to a server?

No. Decoding happens with plain JavaScript in your browser using BigInt arithmetic. Nothing is uploaded or logged.

Why is the decoded date in 1970 or clearly wrong?

That usually means the wrong platform/epoch is selected, or the value pasted is not actually a Snowflake ID (it should be a plain integer, typically 17-19 digits, with no letters, dots, or quotes).

What do worker ID, process ID, and sequence mean?

They identify which generator produced the ID and its position in that millisecond. Discord splits the 10 machine bits into a worker ID and a process ID; Twitter/X splits them into a datacenter ID and a worker ID. The sequence/increment counts IDs generated within the same millisecond on the same machine, resetting each millisecond.

Can I decode a Mastodon or Instagram ID with this?

Only if the platform uses the same 41/42-bit timestamp plus 22-bit worker/sequence layout as Twitter and Discord. Instagram and some others use a different bit split, so results would be incorrect.

Snowflake ID Decoder

Name: Snowflake ID Decoder
Availability: InStock
Author: Nham Vu

Paste a Snowflake ID, pick the right platform epoch, and see the exact creation timestamp plus worker and sequence bits.

Snowflake ID

Platform / Epoch

Discord epoch: 2015-01-01. Twitter/X epoch: 2010-11-04. Picking the wrong one gives the wrong date.

Paste a Snowflake ID on the left to decode it

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Summary

Paste a Snowflake ID, pick the right platform epoch, and see the exact creation timestamp plus worker and sequence bits.

How it works

Paste a Snowflake ID (a large all-digit number) into the input field.
Choose the platform the ID came from: Discord or Twitter/X. Each uses a different custom epoch.
The creation timestamp, worker/process ID, and sequence number appear immediately.
Switch the platform selector if the decoded date looks wrong (roughly 1970 or far in the future) — that means the epoch is mismatched.

Use cases

Find the exact moment a Discord server, channel, message, or user account was created.
Find when a tweet or X account was created from its numeric ID.
Debug a bot or integration that stores raw Snowflake IDs instead of timestamps.
Verify the ordering of two Snowflake IDs without a database lookup.
Extract the worker/process ID to see which shard or node generated an ID.
Teach or learn how bit-packed Snowflake IDs are structured.

Frequently Asked Questions

Last updated: 2026-07-23 · Reviewed by Nham Vu