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Text Case Converter: Upper, Lower, Title, Snake & Camel Case

When to use each text case, how to convert text instantly, and the difference between title case and sentence case.

16 June 2026·4 min read·Open the tool →

Which case should you use?

  • UPPERCASE — headings, acronyms, emphasis.
  • lowercase — usernames, URLs, CSS class names.
  • Title Case — article/blog titles. Capitalises major words, keeps articles lowercase.
  • Sentence case — standard prose. Only first word and proper nouns capitalised.
  • snake_case — Python variables, database columns, file names.
  • camelCase — JavaScript variables and functions.
  • PascalCase — class names in most languages.
  • kebab-case — CSS classes, URL slugs, HTML attributes.

How to convert in one click

  1. Open ToolCrix Text Case Converter.
  2. Paste your text.
  3. Click the target case button — output is instant.
  4. Copy to clipboard.

Use cases

  • Reformatting ALL-CAPS text from copy-pasted PDFs.
  • Converting variable names from snake_case to camelCase.
  • Cleaning up email subjects in weird casing.