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.”

9c7a669a-8fdf-4f36-b6c1-648ba6536776
5f984ac0-ae3a-42ba-a4a6-f9ae57eb3933
fcca1190-a493-48f7-822b-01f4f16ad0dd
03ced2f8-8ee0-44d6-b0b1-03ba4ea6aa35
d57d6790-0f37-4747-8b8c-6c62afcb619f
017883f8-5810-4a6e-adf1-2f7446be935c
59cd6311-d6d9-454b-b592-9fcad7eb7f34
3685c7e4-f754-43f1-9a6a-0b240ab354c5
64fd71b0-3c42-4e67-b5f3-c2a4f1319d4e
022159e9-cd1b-42b8-9337-5fa794afab33
    

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').

CP99-824Q-MH8W
Q6FJ-FV26-G62V
C3W3-F2M7-X33V
37P2-V5R2-74X8
W62R-G6FR-7V7W
GPCG-F8XM-8X3W
94MQ-5H72-GRXJ
GGVX-QVFJ-PX7X
VW7Q-HHH3-H4XV
MH8G-CCWV-7P2M
    

Double UUID V4

256 bits, 32 bytes

244 bits of entropy, 2.8269553 × 10⁷³ possible IDs

3a780b0c-c76b-4f72-b594-7414a5923167-2003aec4-b315-4ba0-b5d6-8809484241f6
f2084754-bf5e-4fb4-8015-caa662b9bee3-ee96ccf2-4297-4c28-ac31-866f2187df3b
700a1086-6778-4bed-a40c-cbd947cf12a7-ae6d630e-9701-4ce9-8915-0ceb2b1989eb
d3ca8816-a32c-4a67-b6dd-46ac149f5f6f-3136d501-a210-468d-a3ba-47bbd054a356
865e7ad8-9133-467f-ad23-a25a33e89a8d-07de5e70-3eb3-4db2-b334-8ec3b0928335
ee68e4f4-52c4-4ebd-bf44-c425f80f0007-f42a7559-3a34-41e9-904b-b6c02e728396
899b5d29-7d26-4f1a-8c58-64d50ab22f03-07ca0189-cf18-40fb-9d96-be44fc20878e
87ec8058-ac22-4d34-8ef0-f8084e8a4327-b3244cf8-36c0-4e20-879b-a4e5c6602b72
61432dda-4b42-4275-bc63-2acb3a654a72-97881c1b-4dc4-46d8-9b48-5002c5f0271a
48fa9731-2cf7-443b-a4a5-8d7524a40949-1cae1156-f4fb-4479-82f7-e6c3dfa172ab
    

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.

01a06f04-4b15-71cb-82cb-08d74f0ad471
01a06f04-4b18-7179-91d2-5f8a6c4ac4b6
01a06f04-4b19-771a-80a6-5c1b78caf599
01a06f04-4b19-771a-80a6-662d1bcba582
01a06f04-4b19-771a-80a6-6fe201960f6d
01a06f04-4b1a-7299-930f-7fe5fa54b243
01a06f04-4b1a-7299-930f-84d3f1e39a58
01a06f04-4b1a-7299-930f-8c0ee86a75ca
01a06f04-4b1a-7299-930f-948a0e43b49e
01a06f04-4b1b-76d0-a980-86e3a81036a1
    

Names (Short)

Randomly generated people names.

Phillida Zaneta
Giacinta Micaela
Mary Rosy
Othilia Marnie
Junie Peggie
Averyl Nariko
Nadeen Laurice
Merridie Lacey
Jewel Clo
Abagael Jemimah
    

Names (Long)

Randomly generated people names.

Emera Janelle Nicolea
Felicia Erda Penelopa
Penelopa Teri Pennie
Loralee Ashil Poppy
Maridel Andree Anna-diane
Gennie Gabbey Donia
Lindsay Eunice Lela
Devinne Celestia Mahala
Shanon Fiorenze Mala
Shannon Nadia Mignonne
    

Countries

Randomly generated country names.

Pakistan
Zimbabwe
Åland Islands
Laos
Estonia
South Africa
Guam
Costa Rica
Russia
Lesotho
    

Passwords

Randomly generated secure passwords.

k[1j5w:k^}MN3{:N>wfu
,gn#[9yN&&gbz(e%(zF5
^LQKCPiwWx{LVPAXZ|8O
O(!?xct>^+UN1lq8QwA#
*^w[;s=@$_PN<wR]E4.i
lm.VYBqx>g;j_REqyl@(
>K9%-)5Y<^j({7v%prwA
bEi2_tIO:oMqq8HdC]Vr
2V70(_I2WZ<JS-^n!v$Y
p;e_B;=^2<6xiMou@3zR
    

Process Folder Names

Sequentially generated process, human-readable, folder names.

20260905-004227-92WR3J
20260905-004227-HJRFWG
20260905-004227-G46QH9
20260905-004227-3XHJFH
20260905-004227-R7WJ3X
20260905-004227-RG67GP
20260905-004227-Q67X9C
20260905-004227-HRHQ3F
20260905-004227-FFPFHG
20260905-004227-52HM5X
    

Google-like IDs

Randomly generated Google-like 'sub' IDs.

429371275489471923389
500083626268214653623
231095092801153765783
118220613983301668631
925933463774155780701
456707600150743729079
325077565747960154764
888681402203764763755
087254192190073583945
804963390446171667252
    

Unix Timestamps

Randomly generated Unix timestamps from the past 2 months.

1784170403
1785244547
1787250671
1785072442
1784201452
1783579069
1786642239
1788529571
1786080054
1784969572
    

GUIDs

Randomly generated GUIDs using the Base64 alphabet.

jBeuPD3W3gCI
9n3VtUIW5C6A
vpgP3TZLC0CC
d_rOYyhKoGfX
Bob1nZxoIWUZ
M5DaSm54tTA0
kPTjY6fKn3GX
-MHAC4rJIBIN
nHVI2YJkgi9D
pQhvrpIyiT8E
    

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').

5JH3G7VFCWC73JC3R74H69R8HRR9RX
8MJ75XQVFXX53QHC6FX6VWP2F8P2FP
2393Q8M98HJFCXXP4496VP9WMW3XGR
3P24P4FHCH92P3F952XRQJJQP7VHC8
5GGXVJV3XV94PH687P97G84HW2WJXC
RJGGF56J78V4CHRGHJ47H63P2Q88X8
W9V5CGMQ5CX8H8JV4XHJW8W5RC4772
PMQ5XQ4H9HQ4F3M7FR7RW5QC8QC7RG
WF8JV423P8J9FVF59RX96968H6XPPJ
WW393J2CHQ2CCH4VCJJQ4WJWWJM7QV
    

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.

J73ncRrXs4vUhgiZb_2aSIJWzJQiNK6N
3cgP3FalP5eZLfbG_N9sENsyKe1eDvde
NYYGGi4vwzyK5gcdtyHDcJ6T5p-oZtvt
pqDH9aEfaWZ3X_WdLQBA-LEBiEmhtpZS
2_gdh29q1PIGLJXxLzv807lbsSyrLkHd
0aWxnhhVAmxCvBA2j2DScl60SNyQ2viw
qL5z4Be80P5L3LPXKZ3nF2h-X0IH7OXY
FvNSNtE5CYbBB2FER3rtNnvimVRRWG3_
BbjEyyPObZMrAvdDtMzmL7_59tjNHIdx
H3DC9g4YjganEiFXFmW37FX18uUVGr-y