Choosing between customisable or customizable can be confusing, especially when both spellings appear correct in different English speaking countries.
The good news is that both forms are accepted, but the spelling you should use depends mainly on whether you are writing in British or American English.
In this guide, you shall learn the difference between customisable and customizable, where each spelling is commonly used, and how to choose the right form for your audience.
We shall also look at the meaning, correct usage, sentence examples, and common mistakes to avoid.
If you are writing an email, website content, academic work, or everyday English, understanding this spelling difference will help you write more accurately and consistently.
By the end, you shall know exactly when to use each form.
Featured Snippet: Quick Answer
Customizable is the correct spelling in American English, while customisable is the British English spelling. Both words mean “able to be changed or adjusted to suit individual preferences or needs.” Use customizable for US audiences and customisable for British English audiences.
Customisable vs. Customizable: Comparison Table
| Feature | Customizable | Customisable |
| Correct Word | Yes | Yes |
| Incorrect Word | No | No |
| Main Meaning | Able to be changed or adjusted | Able to be changed or adjusted |
| Definition | Capable of being modified according to preferences or requirements | Capable of being modified according to preferences or requirements |
| Part of Speech | Adjective | Adjective |
| Grammar Rule | Use ize | Uses ise |
| Standard Variety | American English | British English |
| Common Usage | US English | UK English and many other varieties |
| Pronunciation | /ˈkʌstəmaɪzəbəl/ | /ˈkʌstəmaɪzəbəl/ |
| Grammar Difference | No difference in grammar or meaning | No difference in grammar or meaning |
| Common Mistake | Using it inconsistently with British spelling | Using it inconsistently with American spelling |
| Memory Tip | American = customizable with z | British = customisable with s |
| Example | The dashboard is fully customizable. | The dashboard is fully customisable. |
What Does “Customizable” Mean?
Customizable is an adjective meaning able to be changed, modified, or adjusted according to someone’s preferences, needs, or specifications.
It comes from the verb customize, which means to modify something for a particular person or purpose. The suffix table indicates that something has the capability of receiving that action.
Examples of “Customizable”
- The application has a customizable dashboard.
- Customers can choose a customizable subscription plan.
- The software provides customizable notifications.
- This laptop comes with a customizable keyboard layout.
- The website offers several customizable design options.
In American English, customizable is the preferred spelling.
Pronunciation of “Customizable”
Customizable is generally pronounced:
KUS tuh my zuh bul
The spelling with z does not mean that the word has a different meaning or pronunciation from the British form.
What Does “Customisable” Mean?
Customisable is the British English spelling of the same adjective. It also means able to be changed or modified to meet someone’s preferences, requirements, or specifications.
The only spelling difference is the use of ise rather than ize.
Examples of “Customisable”
- The app has a customisable home screen.
- Customers receive a customisable product.
- The system includes customisable security settings.
- The website offers customisable templates.
- Users can create a customisable profile.
In British English, customisable fits naturally alongside spellings such as customise, customised, and customisation.
Pronunciation of “Customisable”
Customisable is pronounced essentially the same as customizable:
KUS tuh my zuh bul
The difference is primarily visual spelling rather than meaning or pronunciation.
What Is the Difference Between Customisable and Customizable?
The central difference is regional spelling.
- Customizable is the standard American English spelling.
- Customisable is the standard British English spelling.
- Both are adjectives.
- Both have the same meaning.
- Both are pronounced essentially the same way.
- Neither spelling is inherently more correct than the other.
- The best choice depends on your intended English variety and audience.
For example:
The software has a customizable interface.
This is appropriate for an American English audience.
The software has a customisable interface.
This is appropriate for a British English audience.
Why Does the Spelling Change?
The difference follows a broader spelling pattern involving words ending in ize and ise.
American English commonly uses:
- customize
- customized
- customization
- customizable
British English commonly uses:
- customise
- customised
- customisation
- customisable
However, British English is more complicated than simply saying that every ize word must become ise. Some British style systems, including Oxford spelling, retain ize in many words. Therefore, the safest approach is to follow the spelling convention required by your publication, institution, employer, or style guide.
For general American English writing, customizable is the expected form.
Grammar Rules for Customizable and Customisable
Both words are adjectives. They describe a noun by telling the reader that something can be customized.
1. Use Them Before a Noun
Both forms can appear directly before a noun.
- We designed a customizable interface.
- The company sells customisable products.
- Users can select a customizable template.
- The platform provides customisable settings.
2. Use Them After Linking Verbs
They can also appear after linking verbs such as be, become, and remain.
- The interface is customizable.
- The settings are customisable.
- The product can become highly customizable.
3. Do Not Use Them as Verbs
Customizable and customisable are adjectives, not verbs.
Incorrect:
- We customizable the application.
Correct:
- We customize the application.
- We customise the application.
The first form is standard American English, while the second is standard British English.
4. Match the Spelling Throughout Your Writing
Consistency matters. If you are writing in American English, use customize, customized, customization, and customizable consistently.
If you are following a British ise convention, use customise, customised, customisation, and customisable consistently.
When Should You Use “Customizable”?
Use customizable when writing for an American English audience.
It is especially appropriate for:
Academic Writing
- The study evaluated a customizable learning platform.
- Researchers developed a customizable assessment system.
Professional Writing
- Our company offers customizable reporting tools.
- The platform includes customizable user permissions.
Business Writing
- Customers can select a customizable pricing package.
- We provide customizable solutions for small businesses.
Formal English
- The system includes a customizable configuration panel.
- The device has several customizable features.
Emails
- I have attached the customizable template for your review.
- The form contains several customizable fields.
Everyday English
- This phone has a customizable home screen.
- I like having a customizable playlist.
If your audience is primarily in the United States, customizable is usually the safest choice.
When Should You Use “Customisable”?
Use customisable when following British English spelling conventions or writing primarily for audiences accustomed to British English.
It is commonly suitable for writing intended for the United Kingdom and can also appear in other English varieties that follow British spelling conventions.
Examples include:
- The website has a customisable menu.
- Customers can order a customisable package.
- The software provides customisable reports.
- Each account has a customisable profile.
- The application offers customisable privacy settings.
The important point is consistency. If the rest of your document follows British spelling, customisable will generally fit better.
Customisable or Customizable in American English
For American English, choose:
customizable
American English normally uses customize and related forms with z:
- customize
- customized
- customization
- customizable
Example:
The platform provides a fully customizable user experience.
For US focused websites, school assignments, business documents, product descriptions, and general communication, customizable is the standard choice.
Customisable or Customizable in British English
For British English, customisable is a common and widely recognized spelling.
The related forms are:
- customise
- customised
- customisation
- customisable
Example:
The platform provides a fully customisable user experience.
One important nuance is that British English does permit ize spellings in some established style systems. Therefore, British English does not universally require ise. Always follow the style guide specified by your organization or publication.
Common Mistakes to Avoid
Mistake 1: Thinking One Spelling Is Always Wrong
Incorrect assumption:
“Customisable is misspelled.”
That is not true. Customisable is a legitimate spelling used in British English and related spelling conventions.
Likewise, customizable is not incorrect simply because a reader is accustomed to British English.
Mistake 2: Mixing Regional Spellings
A document can look inconsistent if it uses different regional forms without a reason.
For example:
The software lets users customize their profiles and choose customisable settings.
For a consistently American document, use:
The software lets users customize their profiles and choose customizable settings.
Mistake 3: Confusing the Adjective With the Verb
Remember:
- customize/customise = verb
- customized/customised = past participle/adjective
- customization/customisation = noun
- customizable/customisable = adjective
For example:
Users can customize the dashboard.
The dashboard is customizable.
Mistake 4: Assuming the Pronunciation Changes
The spelling difference does not normally create a meaningful pronunciation difference.
Customizable and customisable are pronounced essentially alike.
20 Original Examples of Customizable and Customisable
- The teacher created a customizable online quiz for her students.
- Our office uses a customizable scheduling system.
- The new software includes customizable notification settings.
- Customers can build a customizable package from several available options.
- The manager requested a customizable sales report.
- I prefer a phone with a customizable home screen.
- The author used a customizable template to organize the digital book.
- The news site introduced customizable reading preferences for subscribers.
- Users can choose a customisable layout for their account page.
- The company offers customisable training programmes for different teams.
- The website includes a customisable navigation menu.
- Each customer receives a customisable order form.
- The application provides customisable accessibility settings.
- The new service includes a customisable dashboard for administrators.
- Our British office uses a customisable reporting tool.
- She designed a customisable invitation for the event.
- The product page features a customizable colour and size selector.
- The developer added a customizable search filter to the application.
- The team requested a customizable training schedule.
- The retailer introduced a customisable gift package for customers.
Notice that the examples use each spelling according to the intended regional convention.
Easy Memory Trick
Use this simple rule:
American English → Z → customizable
British English → S → customisable
Think of the related verbs:
- American: customize → customizable
- British: customise → customisable
The adjective keeps the spelling pattern of its base verb.
A quick test can help:
Would I write customize or customise?
If you would write customize, choose customizable.
If you would write customise, choose customisable.
Mini Quiz
1. Which spelling is standard in American English?
A. Customisable
B. Customizable
C. Customizible
D. Customiseable
Answer: B. Customizable
2. Which word is an adjective?
A. Customize
B. Customization
C. Customizable
D. Customizing
Answer: C. Customizable
3. Which sentence follows American English spelling?
A. The app has a customisable interface.
B. The app has a customizable interface.
C. The app has a customizible interface.
D. The app has a customiseable interface.
Answer: B. The app has a customizable interface.
4. Which spelling is commonly used in British English?
A. Customizable
B. Customizeable
C. Customisable
D. Customizible
Answer: C. Customisable
5. What do both words mean?
A. Difficult to change
B. Able to be changed or adjusted
C. Already customized
D. Designed only for businesses
Answer: B. Able to be changed or adjusted
FAQs
Is “customizable” or “customisable” correct?
Both customizable and customisable are correct spellings. Customizable is the standard American English form, while customisable is commonly used in British English. They have the same meaning, grammatical function, and essentially the same pronunciation. Choose the spelling that matches the English variety and style guide you are following.
Is “customizable” American or British English?
Customizable is primarily the American English spelling. It uses ize, following the common American spelling pattern found in words such as customize and customization. If you are writing for a US audience, customizable is generally the preferred form. British English may use customisable, although some British style guides retain ize spellings.
Is “customisable” wrong in American English?
Customisable is not a meaningless or invented spelling, but it is not the usual American English form. American English normally uses customizable zz. If your document is intended for a US audience, using customizable will provide the expected regional spelling and maintain consistency with customize and customization.
What is the difference between customizable and customisable?
There is no difference in meaning between customizable and customisable. Both mean “able to be changed or adjusted according to individual preferences or requirements.” The main distinction is spelling convention. Customizable is associated with American English, while customisable is common in British English and other varieties that use the ise pattern.
How do you pronounce customizable and customisable?
Customizable and customisable are pronounced essentially the same way. A common pronunciation is approximately KUS tuh my zuh bul. The spelling difference between zable and sable does not normally create a different pronunciation. Therefore, you generally cannot rely on hearing the word to determine which spelling someone uses.
Should I use customizable or customisable on my website?
Choose the spelling based on your primary audience. Use customizable if your website primarily targets American English readers. Use customisable if you follow a British ise spelling convention. If your website serves an international audience, either can work, but consistent spelling throughout your content is more important than choosing one form universally.
Key Takeaways
- Customizable and customisable are both correct.
- Customizable is the standard American English spelling.
- Customisable is common in British English and other ise spelling conventions.
- Both words mean able to be changed, adjusted, or personalized.
- Both words function as adjectives.
- Their pronunciation is essentially the same.
- Customize is the corresponding American English verb.
- Customise is the corresponding British English verb.
- Keep related spellings consistent throughout a document.
- Follow your target audience’s English variety and any required style guide.
- British English can also use ize under certain style conventions, so regional spelling is not always completely uniform.
Conclusion
The choice between customisable or customizable depends mainly on the English variety you are using.
Customizable is the standard choice for American English, while customisable is commonly used in British English and other spelling systems that prefer ise.
Both forms have the same meaning: something that can be changed or adjusted to meet individual preferences or requirements. When in doubt, look at the spelling of the related verbcustomize or customiseand keep your writing consistent.
Alexander Reed is an American author at WordsSign. He writes clear and well-researched articles on symbols, meanings, culture, and spiritual insights.
