camelCase writes compound words with no spaces, each word after the first starting with a capital letter — e.g., helloWorld. It is widely used in JavaScript variable names.

What is the difference between camelCase and PascalCase?

Both remove spaces and capitalise each word. PascalCase (also called UpperCamelCase) capitalises the very first letter too — HelloWorld — while camelCase keeps the first letter lowercase — helloWorld.

When should I use snake_case?

snake_case is the standard naming convention in Python (PEP 8) for variables and functions, as well as database column names and file names across many platforms.

What is kebab-case used for?

kebab-case is most common in HTML attributes, CSS class names, URL slugs, and command-line flags — e.g., my-blog-post or --output-file.

What is CONSTANT_CASE?

CONSTANT_CASE (also called SCREAMING_SNAKE_CASE) is all uppercase with underscores — e.g., MAX_RETRY_COUNT. It is conventionally used for immutable constants in many programming languages.

Can this tool convert multiple lines at once?

Yes. Paste any amount of text — including multi-line content — and the selected case conversion is applied to the entire block instantly.

Does the case converter work offline?

All conversions happen in your browser using JavaScript, so after the page loads there is no network requirement. Your text never leaves your device.

What does 'dot.case' mean?

dot.case replaces spaces and separators with periods — e.g., hello.world. It is used in some configuration keys, property accessors, and file naming conventions.

What is alternating case?

Alternating case switches between lowercase and uppercase every other character — e.g., hElLo wOrLd. It has no practical programming use but is popular in meme culture.

Is my text stored anywhere when I use the Case Converter?

No. The Case Converter is entirely client-side — it runs in your browser and does not send your text to any server. Nothing is stored, logged, or transmitted.

Case Converter — Free Online Text Case Changer

What Is the Case Converter?

The Case Converter is a free browser-based tool that transforms any block of text into one of 12 different case formats. Whether you are a developer who needs to normalise variable names, a writer who wants consistent heading capitalisation, or a marketer crafting hashtags, this tool covers every common case style in a single click.

Supported formats at a glance

Format	Example output	Common use
UPPER CASE	`HELLO WORLD`	Emphasis, headers, acronyms
lower case	`hello world`	Normalisation, preprocessing
Title Case	`Hello World`	Article titles, UI labels
Sentence case	`Hello world.`	Body copy, messages
camelCase	`helloWorld`	JS / Java variables
PascalCase	`HelloWorld`	Classes, components
snake_case	`hello_world`	Python, DB columns
kebab-case	`hello-world`	URLs, CSS classes
dot.case	`hello.world`	Config keys, property paths
CONSTANT_CASE	`HELLO_WORLD`	Immutable constants
aLtErNaTiNg	`hElLo wOrLd`	Meme text, fun
iNVERSE cASE	`hELLO wORLD`	Invert existing caps

How to Use the Case Converter

Paste or type

Enter your text in the Input panel — any amount, any language.

Pick a format

Click one of the 12 conversion buttons above the panels.

See the result

The Output panel updates instantly as you type or switch formats.

Copy

Hit Copy for the active format or Copy All to get every variant at once.

Tips

Use Copy All to paste all 12 variants into a doc and compare them side by side.
camelCase and snake_case parsers automatically strip punctuation and special characters.
Sentence case capitalises after every . ! ? boundary.
CONSTANT_CASE is derived from snake_case — spaces and mixed caps become underscores then uppercased.

How the Conversions Work

Every conversion runs entirely in your browser — no server round-trip, no data upload. Here is how each algorithm works:

camelCase / PascalCase

Regex splits on non-alphanumeric boundaries, capitalises each word, then lowercases or uppercases the first character.

snake_case / kebab-case

Inserts a separator before CamelCase transitions, then collapses all space/dash/dot runs into a single separator and lowercases.

Sentence case

First lowercases everything, then uses a regex lookahead on sentence-ending punctuation to uppercase the next word character.

Alternating / Inverse

Splits into individual characters, then maps each by index (alternating) or by current case (inverse).

Alpine.js reactivity

The output is a computed getter — Alpine re-evaluates it on every keystroke or case button click, so the UI feels instant.

Privacy by design

All processing is synchronous JS in your browser tab. No text is ever sent to a server.

When Would You Use a Case Converter?

Software Development

Variable naming — convert human-readable labels to camelCase for JS, snake_case for Python, or PascalCase for class names.
Database migrations — rename columns from camelCase to snake_case in one pass.
Environment variables — transform names to CONSTANT_CASE before adding to .env files.
API normalisation — convert snake_case responses to camelCase for front-end consumption.

Content & SEO

URL slugs — convert article titles to kebab-case for clean, readable URLs.
Heading consistency — enforce Title Case across all H1s before publishing.
Hashtag generation — turn a phrase into a single PascalCase or all-caps hashtag.

Data Processing

CSV headers — normalise inconsistent column casing before import.
JSON keys — bulk convert object keys from one convention to another.
Log analysis — lowercase everything for case-insensitive comparison.

Writing & Design

Email subject lines — quickly toggle between Title Case and Sentence case to match brand guidelines.
Button labels — ensure all CTAs follow a consistent capitalisation style.

Case Converter