Snowflake ID Generator
Generate Snowflake IDs online in your browser, decode existing IDs, and inspect timestamp, machine ID, sequence, and the 64-bit layout.
Snowflake ID Generator
Generate Snowflake IDs online in your browser, decode existing IDs, and inspect timestamp, machine ID, sequence, and the 64-bit layout.
About Snowflake ID generation online
Generate time-sortable Snowflake IDs online
The online generator uses the machine ID you enter to create Snowflake-style numeric identifiers in the browser. The results are time-sortable and compact, which makes them useful for fixtures, prototypes, and examples that need integer IDs.
Good for local simulation, not coordination
This page does not assign worker IDs, reserve ranges, or coordinate sequence ownership across services. For production distributed systems, keep machine and worker ID allocation in your own infrastructure so independent generators do not collide.
Decode Snowflake IDs and inspect the 64-bit layout
The decoder splits each Snowflake ID into a 42-bit millisecond timestamp, 10-bit machine ID, and 12-bit sequence. This makes it easier to debug ordering, worker assignment, and same-millisecond collisions when you paste IDs from logs or test data.
FAQ
Common questions and answers about this topic.
What is a Snowflake ID?
A Snowflake ID is a 64-bit unique identifier scheme originally created by Twitter. It encodes a timestamp, worker/datacenter ID, and sequence number into a single integer.
When should I use Snowflake IDs?
Use Snowflake IDs in distributed systems that need sortable, unique identifiers without central coordination, such as microservices, message queues, and sharded databases.
How is Snowflake ID different from UUID?
Snowflake IDs are 64-bit (smaller than 128-bit UUIDs), time-sortable, and include machine/datacenter information. UUIDs are more widely standardized but larger and not inherently sortable.
Can I decode an existing Snowflake ID online?
Yes. Paste one or more decimal Snowflake IDs and the online decoder will split each ID into its timestamp, machine ID, and sequence fields. Decoding stays in your browser.
Is my data sent to any server?
No. Snowflake ID generation and decoding run entirely in your browser. The IDs are computed locally with JavaScript and never leave your device.