One of the most common questions English writers encounter is whether to use customise or customize. This seemingly simple choice can cause confusion, especially for those writing for international audiences or switching between different English-speaking markets. Both spellings are correct, but understanding when and where to use each one is essential for clear, professional communication.
The difference between customise or customize isn’t about meaning both words refer to the act of modifying or adapting something to meet specific preferences or requirements. Instead, the distinction lies in regional spelling conventions that have evolved over time. Creating content for a website, writing a business proposal, or simply trying to improve your English writing skills, knowing the proper usage of customise or customize will help you connect more effectively with your intended audience.
Which One Is Correct Customise Or Customize?
Both customise and customize are correct spellings of the same word, but they differ based on regional conventions. Customize with a ‘z’ is the standard American English spelling, widely used throughout the United States and in international business contexts. Customise with an ‘s’ is the British English spelling, preferred in the UK, Australia, and other Commonwealth countries.

The choice between them depends entirely on your audience and the style guide you are following. You are writing for an American audience or publication, use customize, while British publications and readers will expect customise. Neither spelling is inherently more correct than the other they simply reflect the natural evolution of English spelling conventions in different parts of the world.
What Is The Definition Of Customize?
Customize means to modify or adapt something according to individual preferences, specifications, or requirements. It involves making changes to a product, service, or experience to better suit specific needs or tastes, rather than accepting it in its standard or default form. For example, you might customize a car by choosing specific colors, features, and accessories, or customize software settings to match your workflow preferences.
What Is The Definition Of Customise?
Customise means to modify or adapt something according to individual preferences, specifications, or requirements. It involves making changes to a product, service, or experience to better suit specific needs or tastes, rather than accepting it in its standard or default form. For example, you might customise a website’s layout to match your brand identity, or customise a meal order to accommodate dietary restrictions or personal preferences.
Diffrent Between In Customisation Or Customization
There is no difference in meaning between customisation and customization they are simply regional spelling variations of the same word. Customization with a ‘z’ is the American English spelling, commonly used in the United States and in most international business and technology contexts.

Customisation with an ‘s’ is the British English spelling, preferred in the United Kingdom, Australia, Canada, and other Commonwealth nations. Both words refer to the process of modifying or adapting something to meet specific individual needs or preferences.
Diffrent Between In Customisable Or Customizable
Customisable and customizable they are simply regional spelling variations of the same adjective. Customizable with a ‘z’ is the American English spelling, predominantly used in the United States and commonly seen in global technology and business contexts. Customisable with an ‘s’ is the British English spelling, preferred in the United Kingdom, Australia, and other Commonwealth countries. Both words describe something that can be modified, adapted, or tailored to meet individual preferences or requirements.
Diffrent Between In Customised Or Customized
Customized with a ‘z’ is the American English spelling, widely used in the United States and commonly adopted in international business, technology, and marketing materials. Customised with an ‘s’ is the British English spelling, preferred in the United Kingdom, Australia, New Zealand, and other Commonwealth nations.

Use Of Customise In Sentences
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You can customise your profile settings to display only the information you want others to see.
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The restaurant allows customers to customise their pizzas by choosing from a variety of toppings and crust options.
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Many smartphone manufacturers now let users customise their home screens with widgets, themes, and personalized layouts.
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The software company offers tools that enable businesses to customise their invoices with company logos and brand colors.
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Interior designers help homeowners customise their living spaces to reflect their personal style and functional needs.
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Online retailers increasingly allow shoppers to customise products such as sneakers, T-shirts, and jewelry before purchasing them.
Use Of Customize In Sentences
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You can customize your email notifications to receive only the updates that matter most to you.
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The car dealership allows buyers to customize their vehicles with different paint colors, interior materials, and technology packages.
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Many video game players enjoy being able to customize their characters’ appearance, abilities, and equipment.
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The company’s software lets users customize their dashboards to display the metrics and data they need to track daily.
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Fitness trainers often customize workout plans based on each client’s fitness level, goals, and any physical limitations.
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Social media platforms enable users to customize their privacy settings to control who can see their posts and personal information.
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Conclusion
The difference between customise or customize is straightforward once you recognize that both spellings are equally valid they simply represent different regional conventions. American English favors customize with a ‘z’, while British English and Commonwealth countries prefer customise with an ‘s’.
The key to using these words correctly lies in knowing your audience and maintaining consistency throughout your writing. Marketing materials, technical documentation, or personal communications, choosing the appropriate spelling demonstrates attention to detail and cultural awareness.
FAQs
Is Customise Or Customize The Correct Spelling?
Both are correct. “Customize” is American English spelling, while “customise” is British English spelling. Choose based on your target audience.
Can I Use Customise And Customize Interchangeably?
While they mean the same thing, you should maintain consistency within a single document or publication. Don’t mix American and British spellings in the same text.
Which Spelling Is More Commonly Used Globally?
“Customize” with a ‘z’ tends to be more common in international business and technology contexts, largely due to American influence in these industries, but both are widely recognized.






