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.”

c031f31f-1c1c-4e06-b6ab-b8702930b414
7a0ffa11-e60e-47f6-a572-8fb089bb8149
647bf403-eb5d-451d-bced-643ffcba3ffe
b2e6b293-4efe-4804-a5fb-8b4ac6c9c38b
02e7d450-a146-45c5-a476-cfa8b4eff192
db6a2489-5c55-4c08-b9d9-3a0fed50d37b
fb25f4bb-7e47-458f-ac56-13f9ca4708ed
055fa204-ec26-43ef-b74b-9360edb5fca2
714d2c6a-c724-4565-a8a0-f4b6d6a381f8
15b993f3-84bd-4019-bcd6-eb86da2f1091
    

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').

P5F9-XMH3-3C6R
XP87-WRQ5-3PPF
FX3F-8VM4-J494
2W67-93C9-7XQ4
7J66-XVGC-PFHC
R56X-PJR3-X4RV
GX6J-FF9M-33FJ
G5MH-JC88-MQP9
5GMM-VC3R-8CVJ
7GMQ-PJ6W-V59X
    

Double UUID V4

256 bits, 32 bytes

244 bits of entropy, 2.8269553 × 10⁷³ possible IDs

83e65913-ac82-44dc-bea3-ccb4878b161d-57fcdfa5-422a-4193-9810-1437e949fb13
49e73906-cade-4e48-97fe-18bbe9995807-7eb54726-e5a4-491b-9e13-12288cbd0701
23fa0f4e-359a-4aa4-b9eb-680e57e345de-cb4e4713-b269-4913-acb6-a6d77192d084
591da80f-04e6-41c7-aba8-d9b94836d537-99b6f716-6767-4973-802f-f81934be0bd3
68199487-863e-4898-a28c-e9bd460728a9-1ced8438-c152-4b15-bff5-86e6549fcf6f
986a2c44-4882-48e6-b6c3-c260bfeda917-34522c85-be49-4137-a9a5-57b17450dfb2
5d927a7f-99d5-47f9-b9c2-a48c07c2fdec-dc6e8df4-3eb3-474c-bd18-d0c7180562eb
c3d14c7d-d2c9-476b-a198-a046c22b0380-966b68be-a10d-4d8b-b5bd-97d78159c8d8
8657923d-2d3f-4f1f-a3f2-d878c730c7aa-1918d2c2-7830-4c95-b943-393e73c32089
e3ef53ab-6d1d-42bd-a40c-83330f810ac3-afe8485f-2559-49a2-8def-d18227d8cb79
    

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.

01a10571-b1b5-74aa-a321-1d9788a9a236
01a10571-b1b6-703f-91df-3ee21fa6bd0a
01a10571-b1b6-703f-91df-449bd0e36c2c
01a10571-b1b6-703f-91df-4ca5c80bf727
01a10571-b1b6-703f-91df-569991081f88
01a10571-b1b6-703f-91df-5f32c734912d
01a10571-b1b6-703f-91df-669160073835
01a10571-b1b6-703f-91df-6c0e45025279
01a10571-b1b6-703f-91df-769419443b91
01a10571-b1b7-76cd-b30f-beaf7a46551f
    

Names (Short)

Randomly generated people names.

Cher Corry
Karla Opalina
Janey Pollyanna
Lilla Mina
Nancey Janina
Blanca Valenka
Bren Keely
Chiquia Adriane
Mellisent Gleda
Eustacia Jacquetta
    

Names (Long)

Randomly generated people names.

Kathye Sherrie Gerrilee
Pam Felisha Chad
Norah Devora Jaine
Guinevere Dorene Larisa
Garnet Mariele Christabel
Marrilee Heida Leontine
Dody Roxanne Fernanda
Dorolisa Leia Emmye
Kelsey Jeanelle Wynnie
Ceciley Netti Nat
    

Countries

Randomly generated country names.

Canary Islands
Gabon
Honduras
Cook Islands
Luxembourg
Belarus
Saudi Arabia
France
Eritrea
Marshall Islands
    

Passwords

Randomly generated secure passwords.

Rx%K;=#(oSi#@r4v-|-!
H*<.@8&F4]rYfUd=m6[p
2oJi{Ca2Su0$jK-S&hta
+:9*R$.gJ@e3p^]=jIHr
wQ$p7iH%X^7x)[#>$PO[
?sG-FdAyaQ52}:htwa*6
pp&y0@k%)]h!KpEabYxb
$8woYp#7Ji0%d{7PsW6U
u2g|Fq4%uIB{(V]Bu50r
*cHyKt0u)B&u3W&usZ*f
    

Process Folder Names

Sequentially generated process, human-readable, folder names.

20261004-054459-HG32XJ
20261004-054459-23FMJ3
20261004-054459-Q5XH74
20261004-054459-4R8GXM
20261004-054459-RVVQ6C
20261004-054459-2C8MCP
20261004-054459-93W689
20261004-054459-3GXRM4
20261004-054459-WC9725
20261004-054459-C5R8P9
    

Google-like IDs

Randomly generated Google-like 'sub' IDs.

000500010053290712232
811721583545720250030
339681989963681590608
511753994900536285771
403719958237256095026
446767412586574574917
195477335865203775067
089944372596217830266
910745423246040746220
810325765709774569146
    

Unix Timestamps

Randomly generated Unix timestamps from the past 2 months.

1786866791
1786330947
1788540528
1787070791
1788673205
1786252638
1788650009
1786927860
1789793692
1787465518
    

GUIDs

Randomly generated GUIDs using the Base64 alphabet.

WFcNE0Q2vOfz
DCwIDK_SbETX
0rgUcGeyKwk5
EK7-y_b-sdVv
WU1uTHhg_4Jd
cj2znAvb15WU
o8N1TCUE_pmr
KEFspUibArQO
FWLeQ9T3CVw4
E_LQZjxqVfDu
    

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').

Q56WPVJ3432RM3P3P6JV24CRXC9MF9
53226MXQW48GWWJ2852C44CJRGGWGM
758P6G3WGH552MCW4Q97M3497H8M5J
RP84MMF7G4VPG3QQMFJPPF5XGWVCCW
5689M87RMP33JF9FPV298QP4628RC8
54FCG9X74MWH6GW8V94FXHRVXJ23MM
6GRJFQ33Q63F3FJM8PRPPFVW8J836X
PG6WC8P6Q6F3RW3G59X223W243Q967
WXWQ95RCW6VXJM45QM4MQ57W8J9WPM
P363XM97MMHQ53H6P65CC72W69FW37
    

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.

R3AIzijys-96UcN4KijN8rFSFbxNn5Lg
j-TVXtshX5a-k35NuIPCd2wv1EVuv7yQ
c63dHBtrDrH0Am1U00L8WncPNkrGvxR4
9pbaiAqJ_Fl8PjkU7AGcGO8xxQzNR_kt
qr5uN0PEXlKJC-CImHBM6lmLTqGSDtRo
PXyV3MjbDMbKSvGjxXnFlOc-64teQm3e
ihOOwQN2hYx_P4lI4VmUArrXeEOo1DtE
CU1IGHQ69tMzAEE8XPK2CJesrjnWsZ48
5NR0Rho7hflfZhSAn27995xK-qL-ZRwo
5xxpLweIz8WhjVOADmJ3ApMigppwApkQ