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.”

eb163f40-f98d-482a-8da6-50e72b31a828
c45d6a66-42ad-4be7-87d1-a4358fa38510
133a78f6-02ec-4e19-9ddb-57f46b08a5dd
b401a18e-997a-4a75-8864-49b14e184e6c
e8ca9437-7eb1-4b04-ae12-6bee49ee476b
edae7037-c1e8-4cb9-82e5-672ce15b0217
e6cdab4e-413e-4f24-8d09-c0d9e8373d67
2993bc55-b303-42d8-b35d-3b1ad33966bf
30a3e94d-66d1-4484-bc6c-01b97e1353ee
55a27f02-0716-4426-aebc-b32e4df66fad
    

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').

WR6W-2C76-HV34
GR8Q-PC65-HRCQ
3QMJ-RQQ3-4464
7Q6G-HQQM-3FVV
9G7C-F32J-C3X6
35H4-WWXF-X8WG
466C-RC3P-FPPG
55XP-RX98-2PCV
9683-X687-W5CM
4F49-VJHG-VW55
    

Double UUID V4

256 bits, 32 bytes

244 bits of entropy, 2.8269553 × 10⁷³ possible IDs

12c88c4e-60a9-40ef-8e82-9ea15db1e492-9a7bd938-6b2e-455b-ac05-4b084ebd6f99
58f83029-f204-4053-9d04-a115db4e6d6b-f360d629-da14-4543-89bc-163205e1c680
004d081b-cd2b-4628-90d3-0f74ccd75e43-56a256f5-7279-4532-b1f7-09eec59c81ff
ce1b4ccd-e9ff-4a77-a0c1-ac5d59b6defc-7c581aaf-9f57-472b-a79e-cedfe4db35ec
0e5fc873-c506-43aa-925e-ecdf3571ca61-29f56e11-8919-42fb-8bfb-afb1985f0062
aa3d86d5-1161-4bcb-8c5b-5ca429640395-47e05b2f-79c2-400e-879f-a40bced6ae6c
53569b56-2f6e-421d-9f14-e6366628536d-5e0c7516-1180-4e86-a7be-1b9f868e1b17
04e4be80-5234-4965-b2a3-8deb4989a496-8946b6fc-f8c5-41f6-b5b2-28a9c51c7b97
303e4f5c-c97d-4ba0-a5db-ffa870800941-764e0388-a223-478a-aee6-d06749104586
2b98d0a8-5db9-43c9-af2d-ce5007767647-2ab13090-5517-4dca-b81f-481da69feaab
    

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.

01a1272e-a15f-7531-ab1f-793970afd0eb
01a1272e-a161-7633-b2f5-71054af0f57f
01a1272e-a161-7633-b2f5-79177004807b
01a1272e-a161-7633-b2f5-815bb9aded8d
01a1272e-a161-7633-b2f5-8a57bf9efa59
01a1272e-a161-7633-b2f5-922bf51625db
01a1272e-a161-7633-b2f5-992bdcfd09bf
01a1272e-a161-7633-b2f5-a1e024356d99
01a1272e-a162-750b-852b-64a88fd55654
01a1272e-a162-750b-852b-6eedc763a145
    

Names (Short)

Randomly generated people names.

Lia Glori
Hedwiga Myriam
Gwendolen Wallis
Flory Rayshell
Noelani Brietta
Ilyssa Wilow
Hester Shellie
Willa Jeannette
Julia Abigale
Tressa Shannah
    

Names (Long)

Randomly generated people names.

Oneida Leesa Lorene
Marilee Mag Andrei
Ola Malanie Lauralee
Lorelei Gussy Lola
Kevyn Tressa Gisela
Anabel Cairistiona Loralyn
Esme Berta Amber
Rhetta Ophelia Carissa
Monika Nadine Irene
Phylys Fleurette Adelind
    

Countries

Randomly generated country names.

Nigeria
Jordan
Estonia
Paraguay
Norfolk Island
Kuwait
Jamaica
Bangladesh
Liberia
Kazakhstan
    

Passwords

Randomly generated secure passwords.

{:oy<^(6lQb_xFeGryK4
;0GUKd%8-T+hrbNLoH#S
Yo@UW*df^.ULOKredYK:
N}ufOd[,XarC}ayBOZN0
GV#!L*g&^>b{$pNE,vfH
uaN=bSf}2[Ce0lX4%z9p
n^T{miDgM.:Ts-zab)ID
5}p0k[6jM$Vu<:D&xzp8
oV=p8f=Gktgv2nU&Ojdb
+&sX=-OTqmoTE[St)V$5
    

Process Folder Names

Sequentially generated process, human-readable, folder names.

20261010-185849-9W3XWX
20261010-185849-VRQ5HC
20261010-185849-V6HGJ9
20261010-185849-67V2H2
20261010-185849-4M6FR5
20261010-185849-H2JJ9F
20261010-185849-2G74JG
20261010-185849-4G5QXR
20261010-185849-MGGG5F
20261010-185849-3GX2QP
    

Google-like IDs

Randomly generated Google-like 'sub' IDs.

678820591244511307098
230913528472513567103
619896951816409559984
937300878372533108781
422805567056359683553
155949367545577836147
677426407198472023847
632453636026535547905
221487096720271099674
910582034998910755694
    

Unix Timestamps

Randomly generated Unix timestamps from the past 2 months.

1790168220
1791261080
1787886932
1786549147
1790498641
1788597020
1791384746
1789032964
1788431496
1790362059
    

GUIDs

Randomly generated GUIDs using the Base64 alphabet.

fV3gj906SdWH
D-x5ppeMRITs
Dl4ne685ANnG
ZGMmtKIdxj7g
nhYX6ho6Jew2
8McmF-85e9af
tayj-FMxhrUc
DFon4G2FXQw5
4vEUB9LuPlRr
V6_Pnt_eVksH
    

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').

64H46GC5P3J8RVQP64WFVJMW99QMJ5
8J823J8H9644FWRW3VFJMGHVGWJVQR
877XX893R3H26H44JR2H9FRMVWHHJX
X865PXM6HGVP649WFCF8WF82V4FXHC
X4JXVCHXHQ8P9WM4MRXGFJW9WG3XJ6
X8836HF9877P96JQ4R59H25J53FQX7
G6WR582RG6FJQF98JF9QXVRPM4FR62
2C2Q9FXJR7QC6XMFMCFWRRG7FR4G58
MQ743R5G3CCCX5J7VQ6CH864GW3J94
X2HVMHWFMHWXP9254RPHR67JF9GWH5
    

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.

Vt8VJgwUT6G4Mdw_jpYn__mZNOGx9V9m
Uxsdgm8HuqjojwjDSCF1hOzZgY5-ouRs
gfS97V_s8MX3J22agu1S9BmDTe_eWq6D
2iJPB_5lT8dJolaMaphGd18wf7YE0P-8
ELH2z3HqrWDBtawY6pnzDpicMwQ8AgZQ
ZLxsQeVDKu-lk_mbslP1gj-5vcx4lLc3
F10keQxfgWcLSHUUBP1pIYxjZs4b0mHn
JPY2_M-sJRChOPu0wV-BgSo2sgrnmWVu
7Q63_sRxypSjTbjJUt0UlzyrftPCcQE5
fQqeJReoAOh3Q_nSwJQL-j0hOLt0UhnG