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.”

1f53236c-3ad4-4d05-8d5c-9ca1841a770b
0746d429-0e15-42e3-a552-517c12090202
096cff7e-ef21-44c6-a3d8-57493951e1c4
a60a270f-6185-4764-b990-d662817de43d
fa8c40fa-cc64-4867-a470-23298765bb72
eb697d29-71e2-43d2-85f3-6db6b67a1254
9fa98405-f074-4b17-9ef6-c0a54b9047dc
981eda25-4a02-4c32-b7fc-3dbb66c11dc8
4e75b11e-8fb4-4f77-a66d-99ea44e414d4
8c9ab64d-f581-4ae6-bd5e-87b3da339019
    

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').

6RFV-J852-C4RQ
26JM-JGCX-XG7X
CW2W-9J25-9M44
J3J6-F6F6-53M5
R7F4-6F36-CPPQ
28H9-J2HQ-QVR9
V35V-J4G6-MHCV
3Q8P-7V5Q-R9PW
9FCM-6V8V-W8FF
R5PJ-7GHW-H95F
    

Double UUID V4

256 bits, 32 bytes

244 bits of entropy, 2.8269553 × 10⁷³ possible IDs

ed866302-0c77-4486-86ef-c6537cc7948f-ce99d177-9c96-4308-844f-9f7936575ccc
362d251f-56c0-41f4-ac3b-b7994f3d7650-ec878b60-fec0-451b-9aa0-b22e9d651c99
77b2c2b5-d057-40e5-ba99-b8a111b43f9c-484b2d55-8b8a-454e-9cf6-d2d6bbbf7c1f
4d938880-d071-401c-986e-b5d576e3187f-5079ece3-c6a8-4828-8065-47be5c566a91
9bc9971c-e859-4929-bed2-edd82a97d7e2-ac88adcf-94b6-4c0c-bc8d-9f34e9ec5997
8a61d3fe-2cda-4074-b2a9-eb68019cdd25-206d21c7-b4e4-4ef0-ad4e-24566264dcbc
40df6b94-9c67-44f1-be3e-15187b497945-7550c338-2dd0-4c77-8900-435319d5901e
2a0381dc-9fb1-43b4-a838-9aaa4bb4bfd5-1ca6ca66-1719-48b6-b9a9-436aae78b2f4
a129e082-ae38-49fc-8996-7251ffe7d4c8-957dcbdc-fbab-4fce-acb1-640bfe4b804c
ffd7e9b0-74fe-451f-9787-413a8a429eea-286dc7e9-7b26-4879-ae17-884896df4f6f
    

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.

01a06f10-4ffb-72af-bfbc-47d9a062c25b
01a06f10-4ffc-7076-80be-a08d8fb418ad
01a06f10-4ffc-7076-80be-aa1d8a841eec
01a06f10-4ffc-7076-80be-b0674538103f
01a06f10-4ffc-7076-80be-bab4fe954f16
01a06f10-4ffc-7076-80be-c03905ed338b
01a06f10-4ffc-7076-80be-ca8fe22f467e
01a06f10-4ffc-7076-80be-d332e2fc6c35
01a06f10-4ffc-7076-80be-d960c915091c
01a06f10-4ffc-7076-80be-e1e6d7857c6d
    

Names (Short)

Randomly generated people names.

Heidi Rhianna
Mirna Lucine
Ranique Elinore
Lebbie Mab
Krystyna Indira
Molly Helli
Chelsy Agretha
Sella Agathe
Pia Wilie
Phylys Eva
    

Names (Long)

Randomly generated people names.

Ellie Jacinthe Valery
Babs Evie Danit
Tracie Mady Ernestine
Elyse Victoria Alison
Luciana Cecilia Taffy
Moreen Kelsi Lillis
Eliza Rosaline Caitrin
Laurie Brandise Karola
Amy Birgit Neile
Candace Rosemonde Devan
    

Countries

Randomly generated country names.

Ceuta & Melilla
Brunei
Gambia
Uganda
Seychelles
Wallis & Futuna
Kosovo
Paraguay
Sri Lanka
Switzerland
    

Passwords

Randomly generated secure passwords.

Hr-.7Y[dh:kez.HmJKW5
E})(bK[c+*GrD4#Ri[eI
J%@*oUIoY;p[aBgPZbIE
tXGA).<_Z*c$I[fa46a)
]6PP?;H.wC|d55)oE[;7
#f{;p9+g{N#6r4=5694?
2BKISe4@h|F<4nNS4o{x
LSlucu%0ANbZfORY6}dF
soVk%Scd0KGi4%8+0OL@
&mz[%Ns:&X.{hX*]5Xe*
    

Process Folder Names

Sequentially generated process, human-readable, folder names.

20260905-005535-2PJH69
20260905-005535-5WP985
20260905-005535-M4X22X
20260905-005535-GWPH8R
20260905-005535-QHP32P
20260905-005535-PXXP32
20260905-005535-J97MQ4
20260905-005535-MV3QWR
20260905-005535-MW73Q6
20260905-005535-3JQF7P
    

Google-like IDs

Randomly generated Google-like 'sub' IDs.

036254093200988209435
233886860447633733079
928151396974777042543
698990792370149881653
555156750839487003645
831794205509159988291
600810517755283654003
784061224886572980731
202191329387963376470
464667488470188678492
    

Unix Timestamps

Randomly generated Unix timestamps from the past 2 months.

1787444775
1783739881
1784566939
1785173901
1787599932
1787251946
1784829809
1785807323
1785198947
1786059667
    

GUIDs

Randomly generated GUIDs using the Base64 alphabet.

ftIJD75vaZaX
umb_KHOo6jB1
B90o0c-XOTP_
B1OUeavgsYxc
UlwQpkoYI12x
0MGEvI5aHCWp
qwzPe_ENNMZ2
dGcdoGMFfQkR
gcdDt5cP-lQR
Ac0zKfNGWqtO
    

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').

3566Q2352V52753H57M4C2MVRXQ39X
WCH745858HMRVMXV48F945WX9FJR49
GWGW3WHJGPX3RR9RG42HQX6R6C952V
6P7QGWGF589PFWFHXMMF2X95HXHF5G
96MCQVQJF3FFXC74G24756922QQGXR
35VWFPP4V6X653MQVCH8F675R3J7H5
77FW9W54G6WCX78HMVC2PXCXRCQR6G
Q96GG3FJG4CRFRR5GVQ3H3588C3MM8
9FQ98P64PHG2J23QVR5VPM2J92PFCQ
59XV3GJPFMX7V24PF8JP5WQP8W34JG
    

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.

OcJbgAfDM5HwVFS8c1G3RRprih-0lI22
w_WwysaP7Zz4RJFXcIYovji8NZdSn0PN
7pY4GAOvwAYXsIr225OGuukRHRNzalaN
MHaZg-qHlEqnJu8OYLArmBxuMjKQcrYm
shGm5ug0LelmvDIQ2yzpv4fibwcz_pRt
Pe_9swplhvJn8p-87D8n7c1YWpon9ZxJ
fCgCDpn-LbcGB8nSUTqyDgJMZqhY3re-
BzJIkCbhq0uuR7yGabWp8X3NVo3G9HVg
vdavGg4VjpNcbfHJj-Cosypf0Gd2bn0n
xke6Bg91hWAgs56kbR70WxzlV6oX-Tog