1. Paste text
Paste any text or identifier. The converter splits it into normalised words on whitespace, punctuation, and camelCase boundaries.
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Case converter
Convert text between UPPER, lower, camelCase, snake_case, and more.
UPPERCASE
HELLO WORLD EXAMPLE
lowercase
hello world example
Title Case
Hello World Example
Sentence case
Hello world example
camelCase
helloWorldExample
PascalCase
HelloWorldExample
snake_case
hello_world_example
kebab-case
hello-world-example
CONSTANT_CASE
HELLO_WORLD_EXAMPLE
Case conversion happens in this browser tab. Nothing is uploaded.
How it works
2. Read every case
All nine cases render live. Tap copy next to the one you want.
3. Mix and match
Round-trip works in both directions — paste `HTMLParser` and watch it become `html-parser`, `HTML_PARSER`, or `Html Parser`.
About the Case Converter tool
The Case Converter rewrites any text or identifier into nine different cases at once: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE. Paste a phrase or a variable name and every style renders live, each with its own copy button. The converter splits words intelligently on spaces, punctuation, and camelCase boundaries, and keeps acronyms intact — HTMLParser becomes HTML_PARSER rather than H_T_M_L_PARSER.
It saves the constant retyping that comes with switching between naming conventions: turning a label into a code-friendly variable, converting an API field from snake_case to camelCase, generating a kebab-case slug for a URL, or cleaning prose into Sentence case. Conversion is pure string handling that runs entirely in your browser, so nothing you paste is uploaded, the tool is free with no limits, no account is needed, and it keeps working offline once the page has loaded.
Frequently asked questions
How does word splitting handle acronyms?
Words are split on whitespace, punctuation, and case boundaries. `HTMLParser` becomes `HTML` + `Parser` so acronyms stay intact in CONSTANT_CASE.
Sentence case vs Title Case?
Sentence case lower-cases everything and then capitalises the first letter — good for prose. Title Case capitalises each word — good for headlines.
Does my text leave my device?
No. Conversion is pure string handling in your browser. Nothing is uploaded.