UUID v4 vs UUID v7: Which One Should You Use in Modern Applications?

May 29, 2026 · 6:03 PM UTC ·5 min read · 0 reactions · 0 comments · 37 views

#uuid #database #performance #systemdesign #backend

TL;DR · WeSearch summary

UUIDs are essential for modern applications, with UUID v4 being the traditional choice due to its simplicity and collision resistance. However, UUID v7 is gaining traction as it addresses the performance issues of v4, particularly in database operations. The choice between them depends on specific workload requirements and system architecture.

Key facts

▪UUID v4 is generated randomly and is highly unpredictable, making it suitable for security and public APIs.
▪UUID v7 combines timestamp information with randomness, allowing for better database performance and natural ordering.
▪The selection between UUID v4 and v7 should be based on the specific needs of the application, including database architecture and scaling requirements.

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Original publisher	DEV.to (Top)
Canonical URL	https://dev.to/kouadio_mathiaskouame_a6/uuid-v4-vs-uuid-v7-which-one-should-you-use-in-modern-applications-1dik
Publication time	Fri, 29 May 2026 18:03:14 +0000
Retrieval time	2026-05-29T18:20:02.626Z
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Opening excerpt (first ~120 words) tap to expand

try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3927615) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Kouadio mathias Kouame Posted on May 29 UUID v4 vs UUID v7: Which One Should You Use in Modern Applications? #database #systemdesign #performance #backend UUIDs are everywhere now. Databases, APIs, distributed systems, event streams, authentication systems, microservices — almost every modern application eventually needs globally unique identifiers. For years, UUID v4 became the default choice because it was simple and highly collision-resistant.

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