Text Case Converter

Convert text between 12 case formats instantly

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100% freeNo signupRuns in your browser

Built by WOWHOW Team · 14+ yrs engineering

Text Case Converter is a free, browser-based tool that lets you convert text between 12 case formats instantly — with zero signup, zero installation. Your data never leaves your browser. Part of 138+ free developer and business tools at wowhow.cloud, built and maintained by a team with 14+ years of hands-on development experience.

TOOLText Case Converter

Input Text9 words · 43 chars

UPPER CASE

All uppercase letters

THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG

lower case

All lowercase letters

the quick brown fox jumps over the lazy dog

Title Case

First letter of each word capitalized

The Quick Brown Fox Jumps Over The Lazy Dog

Sentence case

Only first letter capitalized

The quick brown fox jumps over the lazy dog

camelCase

No spaces, each word capitalized except first

theQuickBrownFoxJumpsOverTheLazyDog

PascalCase

No spaces, every word capitalized

TheQuickBrownFoxJumpsOverTheLazyDog

snake_case

Words joined by underscores

the_quick_brown_fox_jumps_over_the_lazy_dog

kebab-case

Words joined by hyphens

the-quick-brown-fox-jumps-over-the-lazy-dog

CONSTANT_CASE

Uppercase with underscores

THE_QUICK_BROWN_FOX_JUMPS_OVER_THE_LAZY_DOG

dot.case

Words joined by dots

the.quick.brown.fox.jumps.over.the.lazy.dog

path/case

Words joined by forward slashes

the/quick/brown/fox/jumps/over/the/lazy/dog

url-slug

URL-safe lowercase slug

the-quick-brown-fox-jumps-over-the-lazy-dog

About Text Case Converter

Naming conventions vary by language and context: JavaScript uses camelCase for variables, Python prefers snake_case, CSS uses kebab-case, SQL constants are SCREAMING_SNAKE_CASE, and HTTP headers use Title-Case. When copying identifiers between contexts — from a database schema into a TypeScript interface, or from an API spec into a Python model — manual case conversion introduces typos and inconsistencies. Having all 12 conversions available simultaneously eliminates context switching and speeds up cross-language work.

How It Works

The converter first segments the input into an array of words by detecting word boundaries in the source text. Boundary detection handles four cases: transitions from lowercase to uppercase (camelCase boundaries), transitions from a sequence of uppercase letters to a lowercase letter (handling acronyms like XMLParser), non-alphanumeric characters as explicit separators, and whitespace.

Once the word array is established, each target case format is generated by a pure transformation function applied to that array: join with no separator and capitalize per word for PascalCase, join with underscore and lowercase all for snake_case, join with hyphen and uppercase all for COBOL-CASE, and so on for all 12 formats. Operations run synchronously in the browser as you type.

Dot.case uses a period as the separator (config.database.host) and path/case uses forward slashes (config/database/host). Both preserve the number and order of words from the segmentation step. The SCREAMING_SNAKE_CASE format uppercases all letters and joins with underscores, making it suitable for environment variable names and constants.

Who Is This For

A developer copies a database column name (user_created_at) from a schema diagram and converts it to camelCase (userCreatedAt) for a TypeScript interface property.

An API designer converts proposed endpoint names from plain English descriptions to kebab-case URL slugs in one paste operation.

A developer migrating a Python codebase to Go converts 30 snake_case function names to camelCase without manual renaming.

A frontend developer copying variable names from a Figma design system (Title Case labels) converts them to camelCase JavaScript variable names instantly.

How to Use

Paste or type your text in the input field

All 12 case formats are shown instantly

Click any result to copy it to clipboard

Frequently Asked Questions

The tool supports camelCase, PascalCase, snake_case, SCREAMING_SNAKE_CASE, kebab-case, COBOL-CASE, Title Case, lower case, UPPER CASE, dot.case, path/case, and Sentence case.

Yes. The converter handles punctuation, numbers, and mixed-case input gracefully, extracting words intelligently before reformatting.

The word splitter detects transitions between lowercase and uppercase letters (camelCase splits to ["camel", "Case"]), sequences of uppercase letters followed by a lowercase letter (XMLParser splits to ["XML", "Parser"]), and non-alphanumeric characters as delimiters. Numbers adjacent to letters are treated as separate word boundaries.

COBOL-CASE uppercases all letters and separates words with hyphens: MY-VARIABLE-NAME. It is used in COBOL programs, some HTTP headers like X-API-KEY, and certain legacy configuration formats.

Yes. Paste multi-line text such as a list of variable names and each line is converted independently. The output for each case format shows the converted version of every line, preserving the original line structure.

Title Case capitalizes the first letter of every word: "The Quick Brown Fox". Sentence case capitalizes only the first word: "The quick brown fox". The converter applies Sentence case without attempting to detect proper nouns.