Case Converter
Convert text and source code identifiers into UPPERCASE, lowercase, Sentence case, Capitalized Case, Title Case, alternating case (aLtErNaTiNg), and programming conventions (camelCase, snake_case, kebab-case, PascalCase) in bulk. Includes one-click clipboard copying and .txt downloads, all processed locally in your browser.
Text Statistics
Programming Case Conventions Guide
- camelCase: First word lowercase, following words capitalized (e.g. myVariableName)
- snake_case: All lowercase words separated by underscores (e.g. my_variable_name)
- kebab-case: All lowercase words separated by hyphens (e.g. my-variable-name)
- PascalCase: Every word starts with a capital letter (e.g. MyVariableName)
Client-Side Processing
Input source code and text strings are never transmitted to a cloud server. All transformations happen inside your local browser memory.
High-Performance Real-Time Text & Code Case Transformer
Whether renaming coding variables, formatting academic book titles, or standardizing marketing headlines, transform thousands of lines of text with a single click.
10 Comprehensive Case Formats
From standard grammatical casings to developer conventions like camelCase, snake_case, kebab-case, and PascalCase.
Instant Download & Clipboard Copy
Copy converted outputs to your system clipboard or export directly as a .txt document file with one click.
Stays on Your Device
Proprietary source code and confidential documents remain on your device — nothing is sent to a server.
10 Case Types Transformation Comparison Table
Side-by-side comparison of how an example phrase transforms across each case style.
| Case Style | Transformed Output Example | Primary Application Domain |
|---|---|---|
| UPPERCASE | HELLO WORLD VARIABLE | Global constants (CONST), SQL keywords, emphasis |
| lowercase | hello world variable | Body copy, email addresses, URL paths |
| camelCase | helloWorldVariable | JavaScript, TypeScript, Java variables & methods |
| snake_case | hello_world_variable | Python variables, SQL table columns, C libraries |
| kebab-case | hello-world-variable | CSS class names, HTML attributes, REST API slugs |
| PascalCase | HelloWorldVariable | React component names, C# & Java class definitions |
Developer Implementation Snippets for Case Conversion
Standard implementations across major programming languages.
// Uppercase and lowercase conversion
const upper = "hello".toUpperCase(); // "HELLO"
const lower = "WORLD".toLowerCase(); // "world"
// camelCase conversion (Regex)
const camel = str.replace(/(?:^\w|[A-Z]|\b\w)/g, (word, index) => index === 0 ? word.toLowerCase() : word.toUpperCase()).replace(/\s+/g, "");# Standard case conversions
upper_text = "hello".upper() # "HELLO"
lower_text = "WORLD".lower() # "world"
title_text = "hello world".title() # "Hello World"String upper = "hello".toUpperCase(); // "HELLO"
String lower = "WORLD".toLowerCase(); // "world"string upper = "hello".ToUpper(); // "HELLO"
string lower = "WORLD".ToLower(); // "world"Guide to Selecting the Right Programming Case Convention
Industry best practices for applying naming conventions across application layers.
Frontend & UI Components (React / Vue)
Use PascalCase for React component names (`UserProfileCard`) and camelCase for functions and hooks (`userProfileData`).
Backend & Databases (Python / SQL)
Use snake_case for Python variables and DB columns (`user_profile_id`), and UPPERCASE for SQL commands (`SELECT * FROM users`).
Web Styling & URL Routing (CSS / HTML)
Use kebab-case for CSS classes (`btn-primary-lg`) and RESTful URL slugs (`site.com/tool/case-converter`).
Step-by-Step Case Converter Guide
Step 1: Input Text
Type or paste the text/code identifiers you want to format into the editor.
Step 2: Click Desired Case Style
Click any format button (UPPERCASE, camelCase, snake_case, etc.) on the toolbar.
Step 3: Copy or Export
Click "Copy" to save to your clipboard or download as a .txt file.
Frequently Asked Questions (FAQ)
Q.Does this tool preserve non-English characters and numbers?
Yes, only English Latin alphabetic characters (A-Z, a-z) are transformed. Numbers, non-Latin scripts, and special punctuation remain intact.
Q.What is the difference between Title Case and Capitalized Case?
Capitalized Case capitalizes the first letter of every single word, whereas Title Case respects grammatical headline rules (keeping minor prepositions and conjunctions lowercase).
Q.What is the difference between camelCase and PascalCase?
camelCase starts with a lowercase letter (myVariable), while PascalCase starts with an uppercase letter (MyVariable).
Q.Where is kebab-case most commonly required?
In CSS class names (background-color, card-header) and SEO-friendly URL slugs.
Q.Is my source code uploaded or stored on any server?
No. All conversions run locally in your browser's JavaScript engine and work completely offline.