Free Online Developer Case Converter — camelCase, snake_case, PascalCase & More

Convert variable names, function names, database column names, URL slugs, and any text to the correct programming naming convention — instantly, free, online. Paste multiple names (one per line) and convert them all at once. Supports all 5 major developer naming conventions used across JavaScript, Python, Java, C#, Ruby, SQL, CSS, and more.

5 Developer Naming Conventions

camelCaseFirst word lowercase, rest capitalised. Standard for variables and functions in JavaScript, Java, Swift, Kotlin, and TypeScript.

PascalCaseEvery word capitalised. Used for class names, React components, TypeScript types, and C# conventions across the board.

snake_caseAll lowercase, words joined by underscores. The standard in Python, Ruby, SQL, Rust, and PHP for variables and database columns.

CONSTANT_CASEAll uppercase with underscores. Used for constants, environment variables (.env), and config keys in all programming languages.

kebab-caseAll lowercase, words joined by hyphens. Standard for URL slugs, CSS class names, HTML data attributes, and npm package names.

Open in AI — how it works

Each of the three AI buttons (ChatGPT, Gemini, Claude) does exactly the same thing: it copies your converted text to the clipboard and opens the AI platform in a new tab. Your text is pre-filled into the chat via the ?q= URL parameter where supported. If auto-fill does not load — which can happen due to browser settings or platform changes — your text is already on your clipboard. Just paste with Ctrl+V (or ⌘V on Mac) and you are ready to go. One consistent behaviour across all three buttons.

Language quick reference

JavaScript / TypeScript — variables and functions: camelCase · classes: PascalCase · constants: CONSTANT_CASE
Python — variables and functions: snake_case · classes: PascalCase · constants: CONSTANT_CASE
Java / Kotlin — variables and methods: camelCase · classes: PascalCase · constants: CONSTANT_CASE
C# — methods and properties: PascalCase · local variables: camelCase
Ruby — variables and methods: snake_case · classes: PascalCase
SQL — column names and table names: snake_case
CSS / HTML — class names and IDs: kebab-case
URLs — slugs and paths: kebab-case
npm packages — package names: kebab-case

Bulk conversion — convert multiple names at once

Paste multiple variable names or phrases — one per line — and convert them all in a single click. Each line is processed independently. Existing separators (spaces, underscores, hyphens, dots) are all recognised and stripped automatically before applying the target convention. This makes it the fastest free online tool for renaming variables during a codebase refactor.

Who uses a developer case converter?

Frontend developers — quickly convert CSS class names to camelCase for JavaScript style objects
Backend developers — convert database column names (snake_case) to API response keys (camelCase)
Full-stack developers — refactor variable names across a codebase quickly
Database administrators — convert column names between SQL conventions and ORM models
Technical writers — convert plain English descriptions to proper code identifiers