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Text CaseConverter

Convert text between different cases instantly. Perfect for headlines, code, and content formatting.

Enter Your Text

UPPERCASE

All letters capitalized

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lowercase

All letters in small case

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Title Case

First letter of each word capitalized

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Sentence case

First letter capitalized, rest lowercase

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aLtErNaTiNg CaSe

Alternating uppercase and lowercase

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reverse

Text reversed character by character

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What is a Text Case Converter?

A text case converter changes the capitalization style of any text without retyping it. Paste a paragraph, variable name, or filename and switch instantly between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, and CONSTANT_CASE. Writers use it to fix headlines and quotes, while developers use it to rename variables, format API keys, and convert between coding conventions.

How to use this Text Case Converter

  1. 1

    Paste your text

    Drop in a word, sentence, paragraph, or list of identifiers you want to transform.

  2. 2

    Pick a target case

    Choose UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, or CONSTANT_CASE.

  3. 3

    Review the result

    The output updates instantly so you can confirm punctuation and word boundaries look right.

  4. 4

    Copy or download

    Click copy to send the converted text to your clipboard, or download it as a plain text file.

  5. 5

    Convert again if needed

    Switch cases as many times as you want. The tool works on the original text, so no quality is lost.

Frequently asked questions

What is the difference between Title Case and Sentence case?

Title Case capitalizes the first letter of every major word, like a book title. Sentence case only capitalizes the first letter of the sentence and any proper nouns, like normal prose.

How do I convert a variable name like userFirstName to snake_case?

Paste userFirstName, pick snake_case, and the tool returns user_first_name. It detects word boundaries from existing capital letters, hyphens, and underscores, so camelCase, kebab-case, and PascalCase all convert cleanly.

Does the converter handle accented characters and emoji?

Yes. Letters with accents are upper or lowercased correctly using Unicode rules, and emoji and symbols pass through untouched.

Is there a limit on how much text I can convert?

You can paste long documents without issue. Everything runs in your browser, so the text never leaves your device.

What is CONSTANT_CASE used for?

CONSTANT_CASE, also called SCREAMING_SNAKE_CASE, is the convention for constants and environment variables in most programming languages, like API_KEY or MAX_RETRIES.

Can I use this to fix a headline I typed in all caps?

Yes. Paste the all-caps headline and pick Title Case or Sentence case to convert it back to readable form in one click.

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