Case Converter — Uppercase, Lowercase & Title Case
Paste your text and instantly convert case online. Change text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and more — free, fast, and 100% private in your browser.
How it works
Paste your text
Type, paste, or drop a .txt file into the box above. Nothing is uploaded.
Choose a case
Pick UPPERCASE, lowercase, Title Case, Sentence case or a programmer case.
Copy the result
Click Copy result and paste your converted text anywhere you need it.
Why use this free case converter?
Every case in one place
Switch text between uppercase and lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case and CONSTANT_CASE without retyping a single word.
Private by design
This case converter runs entirely in your browser. Your text never leaves your device and nothing is stored on a server.
Built for writers & coders
Fix shouty all-caps emails, capitalize headlines, or format variable names for code — all from one fast, free online tool.
Convert case online — the complete guide
A case converter changes the capitalization of your text in one click, so you never have to retype a sentence just to fix its casing. Whether you accidentally left Caps Lock on, pasted an ALL CAPS paragraph, or need to capitalize the first letter of every word in a headline, this free online case converter does the work instantly. Simply paste your text, choose the style you want, and copy the result.
To change uppercase to lowercase, paste your text and click lowercase — ideal for taming text that was typed with Caps Lock on. To go the other way and change lowercase to uppercase, click UPPERCASE to capitalize every letter for headings, labels, or emphasis. The Title Case option capitalizes the first letter of each word, which is perfect for blog titles, headlines, and book names, while Sentence case capitalizes only the first letter of every sentence the way normal prose is written.
Developers can convert text to programmer-friendly formats too. Use camelCase and PascalCase for variable and class names, snake_case for Python and database fields, kebab-case for URLs and CSS classes, and CONSTANT_CASE for configuration keys and constants. There is also a tOGGLE cASE option that inverts the capitalization of every character and an alternating-case option for stylized text. Because this capitalize-text tool works on any length of content, you can reformat a single word or an entire document just as easily.
Everything happens locally in your browser using JavaScript, so this is a genuinely private way to change text case online. There is no upload, no signup, no watermark, and no limit on how many times you can convert. It works on desktop and mobile, and you can even drop a plain-text file straight onto the box to load it. Bookmark this page so the next time you need to convert case, fix capitalization, or reformat names for code, the right tool is one click away.
How we compare
Looking for a free alternative to ConvertCase.net or TitleCase tools? FixItWhy gives you every common case in a single, ad-light, privacy-first page — no signup and no daily limits. FixItWhy is not affiliated with ConvertCase or any other tool named below.
| Feature | FixItWhy Case Converter | Typical online converters |
|---|---|---|
| Runs 100% in your browser | Yes — text never uploaded | Often server-side |
| Programmer cases (camel, snake, kebab) | Yes | Sometimes |
| Signup required | No | Sometimes |
| Price | Free | Free / freemium |
Frequently asked questions
What is a case converter?
A case converter is a free online tool that changes the capitalization of your text — for example converting UPPERCASE to lowercase, applying Title Case to a headline, or formatting words as camelCase or snake_case — without you having to retype anything.
How do I change uppercase to lowercase?
Paste your text into the box, then click the lowercase button. Your text is instantly converted and you can copy the result with one click.
What is the difference between Title Case and Sentence case?
Title Case capitalizes the first letter of every word, which suits titles and headlines. Sentence case capitalizes only the first letter of each sentence, like normal written prose.
Is this case converter free and private?
Yes. The tool is completely free with no signup, and it runs entirely in your browser, so your text is never uploaded or stored anywhere.
Can I convert text for programming?
Absolutely. You can convert text to camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE, which are commonly used for variables, classes, file names, and constants in code.