Can I convert a list of multiple words or identifiers at once?

Yes, multi-line input is supported — paste a list of identifiers with one per line and the converter processes each line independently. This is useful for batch renaming API field names, converting a list of database column names to camelCase properties, or normalizing a set of CSS class names to kebab-case. The output maintains the same line structure so you can copy the results directly into your code.

What is the difference between snake_case and SCREAMING_SNAKE_CASE?

snake_case uses all lowercase letters with words separated by underscores, commonly used for Python variable names, database column names, and Ruby symbols. SCREAMING_SNAKE_CASE uses all uppercase letters with underscores, conventionally used for constants and environment variable names in most programming languages. For example, a database column might be user_created_at in snake_case while the corresponding constant in code might be USER_CREATED_AT.

Does the tool handle numbers and digits in identifiers correctly?

Numbers adjacent to letters are treated as word boundaries in most cases — so 'mp3Player' becomes 'mp_3_player' or 'mp3-player' depending on the implementation. The behavior for numbers varies between tools, so always verify the output when converting identifiers that include version numbers, numeric suffixes, or technical abbreviations that contain digits. If the output does not match your project's convention, manually adjust the numeric segments after conversion.

Which naming convention should I use for CSS classes, JavaScript variables, and database columns?

The de facto conventions are: kebab-case for CSS class names and HTML attributes (my-button), camelCase for JavaScript variables and function names (myButton), PascalCase for JavaScript class names and React component names (MyButton), snake_case for Python variables and database column names (my_button), and SCREAMING_SNAKE_CASE for constants and environment variables (MY_BUTTON_LABEL). Always follow the conventions already established in the codebase you are contributing to rather than applying a personal preference.

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Text Case Converter

Convert text between camelCase, snake_case, PascalCase, kebab-case, and more.

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Input Text

UPPER CASE

HELLO WORLD

lower case

hello world

Title Case

Hello World

Sentence case

Hello world

camelCase

helloWorld

PascalCase

HelloWorld

snake_case

hello_world

kebab-case

hello-world

CONSTANT_CASE

HELLO_WORLD

How to Use

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Enter your text

Type or paste the text you want to transform. Any length is supported — from a single word to a full document. Processing is instant and local.

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Choose case style

Select from lowercase, UPPERCASE, Title Case, camelCase, PascalCase, snake_case, kebab-case, or CONSTANT_CASE. The result previews immediately.

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Copy transformed text

Click Copy to grab the converted text. Perfect for renaming variables, normalizing user input, or formatting text for different programming conventions.

What is Text Case Converter?

Text Case Converter is an online tool that transforms text between programming naming conventions including camelCase, PascalCase, snake_case, kebab-case, SCREAMING_SNAKE_CASE, Title Case, dot.case, and standard uppercase or lowercase. It solves the tedious problem of manually reformatting variable names, API field names, and config keys when switching between languages or frameworks. Frontend and backend developers, technical writers, and API designers use text case conversion when refactoring code or normalizing data.

Why use Text Case Converter?

Automated case conversion handles edge cases like consecutive uppercase letters, numbers adjacent to words, and special characters correctly — something manual find-and-replace frequently gets wrong. Converting between snake_case database columns and camelCase JavaScript properties in one click eliminates a common source of mapping bugs in ORM and serialization code. The tool processes multi-word and multi-line input in bulk, making it practical for renaming entire sets of API fields at once.

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How it works

Backend developers use the converter to transform snake_case PostgreSQL column names to camelCase JavaScript object properties when writing manual data mapping without an ORM. API designers convert REST endpoint path segments from Title Case documentation into kebab-case URL slugs consistently across an entire API surface. Technical writers convert code identifier lists between conventions when generating documentation for multiple language SDKs from a single source.

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Pro Tip

When converting database column names that contain abbreviations like user_id or http_status_code, preview the output before using it — most converters capitalize each segment individually, producing userId and HttpStatusCode which may not match your project's existing conventions. For bulk conversion of API field names, convert your entire JSON schema at once by pasting the key list rather than converting one field at a time.

Frequently Asked Questions

Acronym handling varies by convention — most converters treat consecutive uppercase letters as a single word segment, so 'HTTPSRequest' becomes 'https_request' in snake_case. If your codebase uses the convention of treating each letter separately ('H_T_T_P_S_Request'), you may need to manually adjust the output. Preview the result before using it in production code, especially for identifiers that mix acronyms with regular words like 'parseHTTPResponse' or 'getUserID'.

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