Text Case Converter

Online tool for changing text case: uppercase, lowercase, title case, camelCase, snake_case, kebab-case, and other formats.

Обработка выполняется локально в браузере. Данные не отправляются на сервер.

For this tool, processing runs locally in your browser and data is not sent to the server.

Text Case Converter is a free online tool for changing text case and formatting strings for documents, code, CMS content, and editors. It supports uppercase, lowercase, title case, sentence case, inverted case, and developer formats such as camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE. Processing runs locally in your browser and data is not sent to the server.

What it does

Output

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How to use

Paste text, a list, heading, variable name, or code fragment into the input field.
Choose the mode you need: uppercase, lowercase, title case, sentence case, or a code format.
If needed, enable whitespace cleanup, empty line removal, or line break normalization.
Copy the finished result and use it in a document, spreadsheet, code file, CMS, or editor.

More about this tool

This tool changes text case and helps you quickly format strings the way you need. You can convert text to uppercase or lowercase, apply title case, sentence case, inverted case, or prepare variable names in camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE. You can also remove extra spaces, empty lines, and normalize line breaks.

Runs in the browser
Data is not sent to the server
Supports plain text, lists, and code fragments
Includes modes for headings and variable names
Can clean up spaces and empty lines
No registration required

Frequently Asked Questions

Which case modes are supported?

The tool supports uppercase, lowercase, title case, sentence case, inverted case, and popular code formats: camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE.

Can I use it for variable names?

Yes. Code-oriented modes such as camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE help you quickly prepare variable names, class names, filenames, or CSS classes.

What does Sentence case do?

Sentence case formats text so the first letter of the sentence becomes uppercase while the rest of the characters are normalized to regular writing.

What does iNVERT mode do?

iNVERT mode flips the case of each character: lowercase letters become uppercase and uppercase letters become lowercase.

Can I remove extra spaces and empty lines?

Yes. Separate options let you collapse spaces, remove empty lines, and normalize line breaks. They can be used together with the selected case mode.

Is my data sent to the server?

No. Text is processed locally in your browser and is not sent to the server.

Do I need to register?

No. The tool works immediately and does not require registration.

How to use

Paste text, a list, heading, variable name, or code fragment into the input field.

Choose the mode you need: uppercase, lowercase, title case, sentence case, or a code format.

If needed, enable whitespace cleanup, empty line removal, or line break normalization.

Copy the finished result and use it in a document, spreadsheet, code file, CMS, or editor.

More about this tool

Runs in the browser
Data is not sent to the server
Supports plain text, lists, and code fragments
Includes modes for headings and variable names
Can clean up spaces and empty lines
No registration required

Frequently Asked Questions

Which case modes are supported?

The tool supports uppercase, lowercase, title case, sentence case, inverted case, and popular code formats: camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE.

Can I use it for variable names?

Yes. Code-oriented modes such as camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE help you quickly prepare variable names, class names, filenames, or CSS classes.

What does Sentence case do?

Sentence case formats text so the first letter of the sentence becomes uppercase while the rest of the characters are normalized to regular writing.

What does iNVERT mode do?

iNVERT mode flips the case of each character: lowercase letters become uppercase and uppercase letters become lowercase.

Can I remove extra spaces and empty lines?

Yes. Separate options let you collapse spaces, remove empty lines, and normalize line breaks. They can be used together with the selected case mode.

Is my data sent to the server?

No. Text is processed locally in your browser and is not sent to the server.

Do I need to register?

No. The tool works immediately and does not require registration.