Text & Language Case Converter – InternetAiTools.com

Text Case & Language Converter – InternetAiTools.com | British ⇄ American

Text Case & Language Converter

InternetAiTools.com · UPPER · lower · Title · British ↔ American (400+ words)

INPUT TEXT
Words: 0 Characters: 0 Lines: 0
UPPERCASE
HELLO WORLD
lowercase
hello world
Title Case
Hello World
British → American
colour → color
American → British
color → colour
OUTPUT — select mode
No mode
Words changed0 changes
No spelling changes detected
ℹ️
400+ spelling differences handled: -our/-or, -ise/-ize, -re/-er, double consonants, and more. Change log shows every conversion.
Frequently asked questions
How many spelling differences are supported? ▼
Over 400 common British ↔ American spelling variants: -our/-or (colour/color), -ise/-ize (organise/organize), -re/-er (centre/center), double consonants (travelling/traveling), and many more.
What's the difference between Title Case and others? ▼
Title Case capitalizes the first letter of every major word (headlines, article titles). Lowercase = all small, UPPERCASE = all caps. Each serves different formatting needs.
Will it incorrectly change already correct words? ▼
No. The converter only changes exact matches from the dictionary. "color" stays "color" in US mode; "colour" becomes "color". The change log shows every modified word.
Does it handle grammar differences? ▼
This tool focuses on spelling (400+ word pairs). Grammar differences like collective nouns (team is/are) or past tense (learned/learnt) require manual review.
How to track what changed? ▼
The "words changed" panel appears during language conversion, showing original word → new word and occurrence count, so you can verify every edit.

Free Text Case & English Spelling Converter

Instantly convert any text between UPPERCASE, lowercase, and Title Case. Perfect for cleaning up messy text, formatting headlines, or standardizing documents. The built-in British ↔ American English converter handles 400+ spelling differences including -our/-or (colour/color), -ise/-ize (organise/organize), -re/-er (centre/center), and double consonants (travelling/traveling). The change log shows exactly which words were transformed.

Use the Swap button to send converted text back to input for multiple transformations. Copy results with one click. All processing happens locally in your browser — zero data transfer, complete privacy. No registration, no ads. Ideal for writers, editors, students, and international content creators who need consistent spelling across English variants.

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