Skip to content

The String normalize() method

Find out all about the JavaScript normalize() method of a string

Unicode has four main normalization forms. Their codes are NFC, NFD, NFKC, NFKD. Wikipedia has a good explanation of the topic.

The normalize() method returns the string normalized according to the form you specify, which you pass as parameter (NFC being the default if the parameter is not set).

I will reuse the MDN example because I’m sure there is a valid usage but I can’t find another example:

'\u1E9B\u0323'.normalize() //ẛ̣
'\u1E9B\u0323'.normalize('NFD') //ẛ̣
'\u1E9B\u0323'.normalize('NFKD') //ṩ
'\u1E9B\u0323'.normalize('NFKC') //ṩ

→ Here's my latest YouTube video

→ Get my JavaScript Beginner's Handbook

→ I wrote 17 books to help you become a better developer, download them all at $0 cost by joining my newsletter

JOIN MY CODING BOOTCAMP, an amazing cohort course that will be a huge step up in your coding career - covering React, Next.js - next edition February 2025

Bootcamp 2025

Join the waiting list