Web Development • Published August 20, 2026

Base64 vs Hex (Base16) vs URL-Encoding: Differences, Size Overhead & Benchmarks

Compare Base64 (+33% size), Hex (+100% size), and URL percent-encoding. Understand character sets, performance benchmarks, and optimal developer use cases.

Comprehensive comparison of Base64, Hexadecimal (Base16), and URL percent-encoding. Learn size multipliers, CPU overhead, and optimal use cases for APIs and databases.

Frequently Asked Questions

Q1. Why is Base64 preferred over Hex for storing files in JSON?

Hex doubles the original file size (+100%), whereas Base64 only increases file size by +33%, saving significant bandwidth and memory.