Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase and more.
About Case Converter
The Case Converter transforms pasted or typed text into eight selectable formats: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case and aLtErNaTiNg case. The original remains in the upper input while a read-only preview shows the selected conversion below, so you can compare the result before copying it.
The natural-language options are suited to headings and prose. Uppercase and lowercase apply standard browser casing rules. Title Case lowercases the text and capitalizes the first non-space character after each whitespace boundary. Sentence case lowercases first, then capitalizes the beginning and a word after a period, question mark or exclamation mark. These are predictable automatic rules, not a grammar-aware editorial style guide.
The identifier options help reshape short labels for code and URLs. camelCase removes runs of spaces, hyphens and underscores while capitalizing the following character. snake_case and kebab-case trim the ends, replace runs of whitespace with an underscore or hyphen, and lowercase the result. Alternating case changes casing by character position, including positions occupied by punctuation or spaces.
How Case Converter works in practice
- 1Paste or type your source text into the upper input.
- 2Select one of the eight format buttons and inspect the converted preview.
- 3Try another format without altering the source if the first result does not fit your purpose.
- 4Use the copy button beside the output and paste the result into your document, code or form.
Jobs this tool is built for
- Repairing a sentence or paragraph accidentally typed with Caps Lock enabled.
- Normalizing imported headings before applying a publication's capitalization rules by hand.
- Turning a short multiword label into camelCase for a variable or property name.
- Preparing a simple phrase as snake_case for a key or kebab-case for a URL slug.
What you can do here
- Eight prose and identifier case formats
- Separate source and read-only output areas
- Instant preview when the format or source changes
- Browser-native uppercase and lowercase conversion
- One-click output copy
Limits and honest caveats
- Title Case capitalizes every whitespace-delimited word, including short words such as “of” and “the”; review publication headings manually.
- snake_case and kebab-case replace whitespace but do not remove all punctuation, while camelCase treats spaces, hyphens and underscores as separators.
- Case conversion happens in the current browser page; copied text is handled by browser clipboard permissions.
Common questions about Case Converter
What does Title Case do here?
It lowercases the input and capitalizes the first non-space character at the start and after whitespace. It does not make exceptions for articles or prepositions.
Will camelCase remove punctuation?
It removes runs of spaces, hyphens and underscores and capitalizes the next character. Other punctuation may remain, so review identifiers before using them in code.
Can I switch formats without re-pasting?
Yes. The source stays unchanged while each format button recalculates the lower preview.
Does Sentence case understand names and acronyms?
No. It applies mechanical lowercasing and sentence-start capitalization, so proper names and acronyms may need manual restoration.
This page was written by the ToolSink team to explain how Case Converter works on this site — it is not syndicated, scraped, or spun from another publisher. How we write tool guides · Site updates · About ToolSink.
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