---
title: "UUIDs, ULIDs and Sqids: A Practical Deep Dive"
url: https://daily.dev/posts/uuids-ulids-and-sqids-a-practical-deep-dive-79nwblyzu
source_url: https://wendelladriel.com/blog/uuids-ulids-and-sqids-a-practical-deep-dive
type: article
source: "W endell Adriel"
author: "Wendell Adriel"
published: 2026-07-06T11:41:17.714Z
updated: 2026-07-10T08:17:31.252Z
tags: ["database", "php"]
reading_time: 16
upvotes: 16
comments: 0
language: en
---

> ## Documentation Index
> Fetch the complete documentation index at: https://daily.dev/llms.txt
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# UUIDs, ULIDs and Sqids: A Practical Deep Dive

**[W endell Adriel](https://daily.dev/sources/wendelladriel)** · [@wendell_adriel](https://daily.dev/wendell_adriel) · 16 min read · 16 upvotes · 0 comments

## Summary

A thorough comparison of UUIDs (v4 and v7), ULIDs, and Sqids covering their generation models, sorting behavior, database storage trade-offs, and security implications. UUIDv4 offers opaque distributed IDs, UUIDv7 adds time-ordering while keeping UUID semantics, ULIDs provide compact lexicographically sortable 128-bit IDs, and Sqids generate reversible short public IDs from existing integers. The post includes PHP code examples using ramsey/uuid, robinvdvleuten/ulid, and the official Sqids package, plus a practical decision flow, database storage guidance (CHAR vs BINARY), and common mistakes like treating Sqids as encryption or relying on hard-to-guess IDs instead of proper authorization.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://wendelladriel.com/blog/uuids-ulids-and-sqids-a-practical-deep-dive>

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---

Tags: [#database](https://daily.dev/tags/database), [#php](https://daily.dev/tags/php)

[View this post on daily.dev](https://daily.dev/posts/uuids-ulids-and-sqids-a-practical-deep-dive-79nwblyzu)