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Case Converter — Free Online Tool
This case converter changes the capitalisation and naming style of any text with one click. Paste a sentence, a heading or a list of variable names, choose a format and the converted result appears immediately, ready to copy. Writers use upper case for emphasis, lower case to fix text typed with caps lock on, title case for headlines and sentence case for tidy paragraphs. Developers rely on the identifier styles: camelCase for JavaScript variables, PascalCase for classes and React components, snake_case for Python and database columns, kebab-case for URLs and CSS classes, and CONSTANT_CASE for environment variables. The tool splits words on spaces, punctuation, underscores, hyphens and existing camel case boundaries, so converting userProfileName to snake_case correctly gives user_profile_name. Each line is handled separately, which means you can convert an entire list of names at once and keep the line breaks. Title case capitalises the first letter of every word without trying to guess small words such as of or the, so check headlines against your style guide when that matters. A toggle option inverts the case of each letter. Use the copy button to place the output on your clipboard or send the result back into the input to chain conversions. The page runs locally in your browser and never stores your text.
Use our Case Converter on AllConvertor — no registration, no download, works on iPhone, Android, Windows, and Mac. All processing runs in your browser when possible for maximum privacy and speed.
How to use Case Converter
- Type or paste your text into the input box.
- Choose a case format such as Title Case or snake_case.
- Review the converted text in the result box.
- Click Copy result to place it on your clipboard.
- Use result as input if you want to chain another conversion.
Key benefits
- ✓ 100% free — no paywall or trial limits
- ✓ No account or email required
- ✓ Mobile-friendly responsive design
- ✓ Instant results in your browser
- ✓ Secure — data stays on your device
- ✓ Trusted by thousands of users daily
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Frequently Asked Questions
How do I convert text to uppercase or lowercase?
Paste or type your text, then click UPPER CASE or lower case. The converted version appears in the result box, and you can copy it with one click.
What is the difference between camelCase and PascalCase?
camelCase starts with a lowercase letter, as in userName, while PascalCase capitalises the first letter too, as in UserName. Both remove spaces and capitalise each following word.
When should I use snake_case or kebab-case?
snake_case is common in Python, Ruby and database column names, while kebab-case is preferred for URLs, file names and CSS class names because hyphens are readable and SEO friendly.
Does the converter keep my line breaks?
Yes. Every line is converted on its own, so a list of names or headings keeps its structure after conversion.
Is my text stored or sent anywhere?
No. All conversions happen in your browser, and the text you enter is never uploaded or saved.