Case Converter Online - Text Case Changer

Convert text between different cases. Fast, secure, and completely free. All processing happens in your browser — no data is sent to any server.

What is a Case Converter?

A Case Converter transforms text between the naming conventions used across different programming languages and contexts — camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, and sentence case — by first splitting the text into its individual words (handling existing separators and word boundaries) and then rejoining them according to the target convention's rules. This sounds trivial until you're renaming a batch of variables or converting a spreadsheet's column headers into code-safe identifiers, at which point doing it manually for more than a handful of names quickly becomes tedious and inconsistent.

How to Use Case Converter

1. Paste or type the text you want to convert — a single identifier or a whole list, one per line
2. Select the target case format: camelCase, snake_case, kebab-case, PascalCase, etc.
3. The converted output appears instantly for every line of input
4. Copy the result directly into your code, config file, or spreadsheet
5. Switch target formats without re-entering your text to compare conventions side by side

Key Features

• Supports camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, and sentence case
• Converts multiple lines at once, preserving line breaks
• Correctly detects word boundaries from existing casing, hyphens, underscores, or spaces
• Handles acronyms and numbers sensibly during conversion
• Instant, real-time conversion as you type or paste

Why Use Case Converter?

Different languages and style guides enforce different naming conventions — JavaScript variables in camelCase, Python variables in snake_case, CSS custom properties in kebab-case, environment variables in CONSTANT_CASE — and translating a batch of names between them by hand is slow and invites typos. This is especially useful when porting code between languages, converting a database's snake_case columns into a frontend's camelCase API fields, or standardizing a list of identifiers pulled from a spec or spreadsheet.

Common Use Cases

• Converting database column names (snake_case) into API field names (camelCase)
• Renaming a batch of variables when porting code from Python to JavaScript or vice versa
• Converting a spreadsheet's header row into code-safe identifiers
• Standardizing CSS custom property names to kebab-case
• Converting environment variable names to CONSTANT_CASE for a .env file

Frequently Asked Questions

How does the converter know where one word ends and another begins?

It uses existing signals — capital letters in camelCase/PascalCase, underscores in snake_case, hyphens in kebab-case, or spaces — to detect word boundaries before reassembling the text in the target format.

What happens to acronyms, like converting 'userID' or 'HTTPRequest'?

Acronyms are treated as a sequence of capital letters and handled sensibly during conversion, though very ambiguous cases (like consecutive uppercase letters with no lowercase to signal a boundary) may split differently than you'd manually choose — review the output for identifiers with acronyms.

Can I convert an entire list of names at once instead of one at a time?

Yes, paste multiple lines and each one is converted independently, preserving the line breaks in the output.

Does it handle numbers within identifiers correctly?

Yes, numbers are preserved and attached sensibly to adjacent word segments rather than being treated as separate words by default.

Will converting change anything other than casing and separators?

No, only the casing style and word separators change — the actual words and their order in your text remain the same.

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