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TEXT & WRITING

Case Converter

Turn any text into UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE all at once.

Tool statusRuns in your browser
Preview
Or drop a text filechoose a file
.txt, .md, .csv, .json, .log · up to 2.0 MB. Read in your browser, never uploaded.

Every case updates as you type.

Results

How it works

  1. Enter your input

    Fill in the values, paste your text, or upload the file this tool works with.

  2. See results instantly

    Most tools update live as you type; a few use a single button. Either way, the result appears right on this page.

  3. Use your results

    Copy, download, or share what the tool produces — you're always in control of the output.

Privacy and processing — Runs locally in your browser. This tool does not upload your input.

What is Case Converter?

Turn one phrase or draft into display text, sentence copy, or code-friendly identifiers without rewriting it by hand.

UNDERSTAND THE TOOL

Choosing the right text case

Display text cases

Uppercase and lowercase keep the original spacing and punctuation while changing letter case. Sentence case lowercases the text and capitalizes the first letter at the start of the text and after common sentence punctuation.

Title Case is a simple word-by-word capitalization, useful for rough headings and labels. It does not apply editorial rules such as keeping short articles or prepositions lowercase.

Identifier cases

  • camelCase joins words with no separator and a lowercase first word, common for JavaScript variables.
  • PascalCase is the same but capitalizes every word, common for class and component names.
  • snake_case and kebab-case join words with an underscore or hyphen, common in Python, file names, and CSS.
  • CONSTANT_CASE is snake_case in uppercase, common for constants and environment variables.

How words are split

Identifier-style results split on spaces, punctuation, hyphens, underscores, and camelCase boundaries. For example, "first-name", "first_name", and "firstName" all become the same two-word input before the output is rebuilt.

How to use it well

  • Paste or type text, or drop a plain text file.
  • Read any of the nine converted results.
  • Review names with acronyms, brands, or language-specific capitalization before publishing.
  • Choose Copy next to the case you need.

Case output example

Convert a label into code identifiers

Quarterly revenue API becomes quarterlyRevenueApi for camelCase, quarterly_revenue_api for snake_case, and QUARTERLY_REVENUE_API for constant case.

Quarterly revenue API -> quarterlyRevenueApi

Working with pasted text

The original and converted versions stay visible on the page while you edit. Use Clear before changing tasks on a shared device or screen.

Frequently Asked Questions

Does Title Case follow AP, Chicago, or another style guide?

No. It capitalizes each detected word in a straightforward way. For editorial titles, use the output as a starting point and adjust small words, acronyms, and brand names manually.

Why did accents or symbols disappear from camelCase?

Identifier cases are built from ASCII letters and digits so the result works well in code, URLs, and file names. Uppercase, lowercase, and sentence case keep accented letters.

What counts as a sentence for Sentence case?

The text is split on periods, exclamation marks, and question marks followed by a space, and the first letter after each is capitalized; everything else is lowercased.

Will line breaks be preserved?

Uppercase, lowercase, and sentence case preserve the original line breaks. Identifier cases combine detected words into one value, so line breaks become word separators.

Can I convert a whole file?

Yes. Drop a plain text file such as .txt, .md, .csv, .json, or .log into the input and every case updates from its contents.

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