ID Generator & Decoder

Create modern IDs, or paste one to find out when it was made.

Private by design

Your inputs stay on your device and are not sent to our servers. Optional usage analytics does not receive your files or tool inputs.

ID Generator & Decoder

ULID, UUIDv7, KSUID, Snowflake and NanoID

How many IDs to make (Generate) or IDs to decode (Decode)

Result

The result appears here.

Options

ID type

Time-sortable IDs start with the moment they were made, so newer IDs sort after older ones in a database. ULID, UUIDv7 and KSUID store a timestamp plus random bits. A Snowflake packs a timestamp, a worker number and a counter into one 64-bit number. NanoID is just random and short.

Snowflakes depend on an epoch: Twitter and Discord start counting from different dates, so pick the right one when decoding.
UUIDv7 follows RFC 9562 and works anywhere a normal UUID does.
Paste many IDs, one per line, to decode them all at once.

ULID (26-character Crockford base32, 48-bit millisecond time + 80 random bits), UUIDv7 (RFC 9562), KSUID (27-character base62, seconds since 2014-05-13 + 128 random bits), Snowflake (41-bit time, 10-bit worker, 12-bit sequence) and NanoID (64-character URL alphabet). Randomness comes from crypto.getRandomValues. Runs entirely in your browser.

Preparing tool

How to use ID Generator & Decoder

Choose Generate or Decode at the top.
To generate, type how many IDs you want and pick the type. To decode, paste IDs, one per line.
Copy the results or download them.

Read the detailed guide →

What are the limits of ID Generator & Decoder?

Made with your browser's secure random numbers. Snowflake IDs here use a random worker number, so they are for testing, not for running a real ID service. NanoIDs carry no timestamp. Decoding can only guess the type of a 21-character or all-digit ID. Your data stays on your device.