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What is Case Modify?
Case Modify is a free case converter tool. Paste text above to switch between sentence case, lowercase, uppercase, and title case. Other utilities, such as PDF, images, and random generators, live on their own category pages.
What is a case converter?
A case converter changes how letters are capitalized without rewriting your content. Uppercase and lowercase shift every letter; sentence case and title case follow publishing rules for body copy and headlines; developer styles such as camelCase, PascalCase, snake_case, and kebab-case turn phrases into identifiers for code, URLs, and config files.
A case changer is the same job with a different name: one paste, then uppercase, lowercase, sentence case, or title case. Alternating case (mock caps) and inverse case help with creative text or fixing accidental Caps Lock input. Capitalized case uppercases the first letter of every word—a quick cleanup that is not the same as editorial title case, which leaves short words lowercase in the middle of a heading.
Naming styles are a second group: camelCase, PascalCase, snake_case, and kebab-case. The comparison table below shows when each one fits. PDF, image, and random tools are listed under Other categories.
Which text case should you use?
| Case | Example | Common use |
|---|---|---|
| Sentence case | Hello world | Body copy, emails, UI strings |
| Title Case | Hello World | Headlines, blog titles, slide titles |
| UPPERCASE | HELLO WORLD | Labels, emphasis, fixing caps-lock |
| lowercase | hello world | URLs, text normalization |
| Capitalized Case | Hello World | Every word capitalized (not style-guide title case) |
| camelCase | helloWorld | JavaScript variables, JSON keys |
| PascalCase | HelloWorld | Classes, React components, types |
| snake_case | hello_world | Python, SQL columns, data files |
| kebab-case | hello-world | URL slugs, CSS classes, CLI flags |
| CONSTANT_CASE | HELLO_WORLD | Environment variables, enums |
| dot.case | hello.world | i18n keys, config paths |
Why use this case converter?
- Paste, pick a case, and copy. No account.
- The change runs in this browser.
- Each case style has its own page when you want that rule every time.
Popular case converters
Open a dedicated page for one capitalization rule, or browse the case converters hub for every style in one place.
Sentence Case
Capitalize the first word of each sentence. This is the usual style for emails and body copy.
This is an example of sentence case.
Lowercase
Drop every letter to small letters when a paste arrived in capitals.
this is an example of lower case.
Uppercase
Raise every letter. Numbers and punctuation stay as they are.
THIS IS AN EXAMPLE OF UPPER CASE.
Title Case
Capitalize the main words in a headline. Short words such as of and the can stay lower.
This Is an Example of Title Case.
Capitalize each word
Raise the first letter of every word, including of and the. That is not title case.
The Lord Of The Rings
Other categories
These are separate from the case converter. Open a hub when you need that kind of tool.
- Case converters — Title, sentence, upper, lower, and developer naming styles.
- Text tools — Cleanup, counts, lorem ipsum, find-and-replace, and more.
- Code & data tools — JSON, HTML, CSS, JavaScript, encoders, and formatters.
- JSON tools — Format, edit, stringify, escape, and convert JSON.
- Unicode & font tools — Bold, italic, bubble, wide, and aesthetic Unicode text.
- Unit converters — Length, weight, temperature, and engineering units.
- PDF tools — Edit, merge, split, compress, and sign PDFs in your browser.
- Image converters — PNG, JPG, WebP, SVG, and ICO in your browser.
- Random generators — UUIDs, passwords, numbers, and random picks.