How to create GUID(Globally Unique ID) in JavaScript?
How to create GUID(Globally Unique ID) in JavaScript?
590
03-Apr-2021
Updated on 16-Mar-2025
Khushi Singh
16-Mar-2025A GUID (Globally Unique Identifier) functions as a unique 128-bit value which gets formatted as the string
xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxxwhen presented in JavaScript. JavaScript lacks a native mechanism for GUID generation so developers implement various solutions to create GUIDs. The standard GUID structure can be achieved by usingMath.random()to generate numbers which are then formatted properly. The string character substitution method produces random hexadecimal values that maintain a 4 in the third segment and use 8 9 A or B as initial section values for the fourth segment according to GUID specifications.The crypto API offers a dependable approach to generate GUIDs through its provision of cryptographic random values. The
crypto.getRandomValues()function delivers genuine random outputs to serve critical requirements of session identifiers authentication tokens as well as distributed database keys. Using crypto API stands out as the better alternative toMath.random()becauseMath.random()producesunrandomresults which generate possible duplicate GUIDs in high-volume systems.The software development process heavily depends on GUIDs since they provide distinct references to track objects and records and transactions between separate systems. These references apply to databases and distributed systems and systems which need unique references beyond conventional sequential numbering methods. GUID's provide conflict prevention in systems that serve multiple users thereby maintaining different identifier generation between users and services. Applications can easily create GUIDs through different accessible approaches in JavaScript even though the language does not provide built-in support for GUID functionality. Users should select random value generation methods according to their use needs since crypto.getRandomValues() stands as the most recommended solution for producing genuine unique identities in critical security environments.