onul.works

Case Converter

Convert case online for uppercase, lowercase, title case, sentence case, and developer-friendly identifier formats.

⌘ Runs in browser ◴ No data stored ⌁ Free

Search intent

Use a case converter for consistent English text style

Use this tool when you need a quick, repeatable way to standardize case across docs, UI copy, and identifiers.

People usually search for case conversion when mixed text styles appear across titles, buttons, and product copy and they need a consistent convention.

In coding workflows, it is commonly used to switch values into Title Case, camelCase, snake_case, uppercase, or lowercase before publication or commit.

Use cases

Unify headings, labels, and short copy, or align identifier naming style before moving content into code.

Which case to pick

Sentence/title style is for human-readable copy, while camelCase/snake_case fits variable-like identifiers.

Quick checks

Keep acronym and proper noun rules consistent first, then verify conversion output before final copy.

This tool changes letter case only; it does not correct grammar or intent, so review key terms after conversion.

Source text
Case conversion results

How to use

  1. 1 Enter or paste the text you want to convert.
  2. 2 Choose uppercase, lowercase, Title Case, camelCase, or another case format.
  3. 3 Click convert and review the output.
  4. 4 Copy the converted text when it looks right.

Common use cases

  • Convert headings to Title Case
  • Turn names into camelCase or snake_case
  • Batch convert case between uppercase and lowercase text

Frequently asked questions

Which case formats are supported?

It converts text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE.

Does it convert automatically while I type?

Yes. The output updates when you type text or change the selected case format.

How are words split?

Words are split on spaces, hyphens, underscores, and camelCase or PascalCase letter boundaries.

Related workflow

Case ConverterUse the case converter to normalize headings, button labels, or identifiers before they move into docs or code. → Markdown PreviewPreview the rendered result when those cleaned labels belong in a README or guide. → Remove Duplicate LinesClean up repeated lines at the end when pasted lists pick up duplicates.