UUID V4

128 bits, 16 bytes

122 bits of entropy, 5.31691198 × 10³⁶ possible IDs

“...the odds of collision between any two is 1 in 2.71 x 10¹⁸ Put another way, one would need to generate 1 billion v4 UUIDs per second for 85 years to have a 50% chance of a single collision.”

ba8bf816-fcb1-4605-bc6c-a5780556cae8
6a90ad1f-ad26-4c49-8dbc-6d4d216deba5
996ef472-2507-481b-b058-c6de4a46fb2e
19ce9b47-243f-4929-b066-489fed2074c0
5d62aea5-f430-49f8-81ea-3a49544f5254
17c5a537-564f-401e-83f4-c1f3cc741fa3
ac3b8a6b-bbaf-48cd-8281-a87902e48ef1
c4a4776c-8a73-4918-ac67-c119abff6c30
b60424b9-a7f3-44ca-931b-adabed61dd37
3003104c-7e25-4079-a3c2-307aad6a4fcb
    

OLC IDs

12 characters, 12 bytes

51.863 bits of entropy, 4.096 × 10¹⁵ possible IDs

Open Location Code (OLC) alphabet Ids. OLC is a geocoding system that encodes latitude and longitude into a short string of characters. The alphabet is simplified to use only uppercase letters and digits, excluding characters that can be easily confused (like '0' and 'O', '1' and 'I').

9QJW-92J8-7PX7
4M7J-4M59-XJ2P
HV43-424G-PR4J
PGH5-XQ83-7C9H
9PXG-Q668-PWMR
JHJ5-5XV3-MMXJ
JH4F-6447-J4H9
M4W6-FXX8-9G83
GG5H-3QQ3-XWC3
5X7J-4G7V-GMJF
    

Double UUID V4

256 bits, 32 bytes

244 bits of entropy, 2.8269553 × 10⁷³ possible IDs

4123aa06-c6a7-4a19-af32-d385cca2524a-4075143b-8aab-4d29-85da-fee96db0800d
eb13da86-466a-4fe7-9c34-c9f3f35cd66f-e983c2e9-4354-4b81-ba8a-0aeeadc7bc1f
42ff4c00-c699-44ff-8548-db6d4606e551-6ada562e-b337-4e81-a216-c0ae1d296bc3
a9c60627-cef2-4628-8b8f-11796e83a8a2-ed97be78-a9f1-4419-b44a-5098427f7ed4
3715a00d-76e7-4e57-89bb-11067feae0e4-ef8762b0-c49d-4bae-adbc-fe1e52e77598
021878ca-da8e-449c-a017-daa95ef12703-fea67cf6-a150-4699-9ac5-44e5f9f03300
88426fd1-f9f7-46ed-a6b8-913b9fd81049-1e5a1295-9d6b-489d-a272-e5a7f2115dfb
f8ce3aa0-3cde-4c99-8476-68fa57766d78-a763df94-00b3-4fa4-a5db-4c56dc784c6e
b9fc4b79-28f5-4b20-962c-cad675affddd-6266e423-e145-4026-a387-a7c1a28c7807
a44ed71b-80ab-4e8d-8206-d056820804c1-76f5ad91-8d3d-478b-87f7-de906a2cd12a
    

UUID V7

Unix ms timestamp (48-bit), random bits (74-bit total). Sortable by time.

Excellent DB performance (sequential inserts); sortable; no MAC leakage. Database primary keys; distributed systems. Recommended for most modern apps/DBs.

01a12756-e067-757c-bdcb-bfe8be286c72
01a12756-e068-75dc-986b-ace010ea6b88
01a12756-e068-75dc-986b-b4b389cb2368
01a12756-e068-75dc-986b-bd0f27b856f7
01a12756-e068-75dc-986b-c67424a33f21
01a12756-e068-75dc-986b-cf146afe6b19
01a12756-e068-75dc-986b-d53a54736e15
01a12756-e068-75dc-986b-dcc663ff2818
01a12756-e068-75dc-986b-e50ef38db79e
01a12756-e068-75dc-986b-ec2603f5b88b
    

Names (Short)

Randomly generated people names.

Kippy Nonah
Electra Eran
Sue Raychel
Anitra Faun
Gabrielle Val
Zabrina Johannah
Gus Cindra
Marjie Yasmin
Salaidh Heath
Celka Deny
    

Names (Long)

Randomly generated people names.

Brear Stella Pearline
Lelah Ynez Heidie
Lynne Xenia Alyss
Jennine Charlene Nicki
Devi Amalle Claudetta
Kristin Amalie Emilie
Freda Barbee Aura
Aurie Brandice Wilmette
Betsy Johnath Sherilyn
Alberta Joice Addy
    

Countries

Randomly generated country names.

Tokelau
Sierra Leone
Tajikistan
French Guiana
Puerto Rico
Cape Verde
Grenada
Western Sahara
Fiji
St. Vincent & Grenadines
    

Passwords

Randomly generated secure passwords.

rV7&uPuAQk_.0p#mW^|Q
dK=rzF<Tu;n&hdxdw4L1
)@{K)AC5j{T8h}h*tG95
u[.Qny8))[7XgTca}BMp
rOcPH!}Dkb7zPMhBOPC{
bH7EG+%+ne.$1?lTSHF&
v>4jluWAvDa+[rH|_*zv
Z^Od3g&u[NScn4rGryx>
;VDP&+*nW-j.h!ZpX7{}
@Z&QgSFj%B8AYuNl3$9j
    

Process Folder Names

Sequentially generated process, human-readable, folder names.

20261010-194247-VG6PH5
20261010-194247-PFF29M
20261010-194247-GVWXMW
20261010-194247-3FM5C2
20261010-194247-9V95VG
20261010-194247-PW99GX
20261010-194247-PGVJ35
20261010-194247-Q6JCHV
20261010-194247-7Q349R
20261010-194247-6XQ6V5
    

Google-like IDs

Randomly generated Google-like 'sub' IDs.

031415794372368509915
405921322570241236023
992859173025612836201
711578118752217937151
096245260170956005816
533845907754292965210
432289387157696911252
661708793881807444637
131896453526394996063
661675897571512003889
    

Unix Timestamps

Randomly generated Unix timestamps from the past 2 months.

1791024737
1786504949
1789401824
1786756028
1788303749
1789196983
1788504301
1791404787
1786810049
1790069338
    

GUIDs

Randomly generated GUIDs using the Base64 alphabet.

qBiOQwigFPYj
4pbTcF2dgy5T
vc77pgGRHo0-
pD_vTKM0L3Nk
B9HyXcUTlgIF
HzCivtgT2Hjs
WGTNDdElK-JL
FWD20eA8hOcA
6TuoI17A1J8p
rQFw9Iypx2Ht
    

Randomly generated OLC IDs.

Secure 128-bit random IDs, using the Open Location Code (OLC) alphabet. The alphabet is simplified to use only uppercase letters and digits, excluding characters that can be easily confused (like '0' and 'O', '1' and 'I').

R579JFJQGX3GP6VX3QMCG6JX63M66G
G8RH54F7MW759G57RCCXQ53686P86M
M6P2XC386PFM49WJ943X9C6745W5RP
6888H925H7J64874PH3HF39WQ2WHMC
J39C7WCP74GQ26R66437FWC64H2688
MWRXJH42PM3782644876C6MP2C5GPH
85M96RVH53V5H5F8R37PPG7X7P44XC
PM2FWJM46396648J24QFCR5WCQ33CQ
5548H8X89XF24VHJG89QMVH873JJVH
VVW7553QH8VRXMV48JGQ3P5QJ4FXW3
    

Encrypted URL IDs (GUID)

Base64URL encoded encrypted V7 UUID tokens. Each token packs an 8-byte random IV plus a UUIDv7 XOR-masked with an HMAC-SHA256 keystream derived from the IV and a private key, so the token is opaque and non-sequential in URLs but still reversible to recover the original UUIDv7 (and its embedded timestamp) server-side.

hNDsiIITglamB_Sl7CywFzARN82eKeX6
bJc4s7EOuuAmq7GGnwwepaj_LCmEvVKA
lXq479mqY_dL4Y-5FHWgBaOFhucHS5Er
wrR40gVcakxYu9h7Qy4g6gszO2-YMpBl
GtVzCTyvhtMERF4U2GljDpzOVw4riTA7
hXP90wMqPg-2LA8D5fYr3V2hMoZM9CLJ
FtFDYPKh253jWJA3PVBcNKmJwilm5nIf
Uaxi88tJo_weFtMbP7tlN9u-iUApaepU
nsimV9FXq3KZiMoTABKZMD7h7BLb6GYE
lXVcxfNjI0fywQVE3DYoqaiTQtxJ4E_4