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Design URL Shortener
Last Updated: June 14, 2026
Ashish Pratap Singh
High Priority
easy
32 min read
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On this page
1. Clarifying Requirements
2. Back-of-the-Envelope Estimation
3. Core APIs
4. High-Level Design
4.1 Requirement 1: URL Shortening
Components Needed
4.2 Requirement 2: URL Redirection
5. Database Design
5.1 SQL vs NoSQL
5.2 Database Schema
6. Design Deep Dive
6.1 Unique URL Generation
6.2 Fast URL Redirections
6.3 Supporting Custom Aliases
6.4 Handling High Availability
7. Follow-ups
7.1 Supporting Link Expiration
7.2 Analytics – Click Count
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