Case Converter Online

About this tool

Case Converter Online 2 is a free, browser-based text transformation utility that rewrites any piece of text into a different capitalisation style in a single click. Whether you need UPPERCASE headings, camelCase variable names, snake_case file names or perfectly formatted Title Case headlines, the tool converts it instantly — without uploading, storing or sharing your text anywhere.

Supported case styles

• UPPERCASE — every letter capitalised.
• lowercase — every letter lowered.
• Title Case — first letter of every word capitalised.
• Sentence case — only the first letter of each sentence capitalised.
• camelCase — first word lowercase, the rest capitalised, no separators.
• PascalCase — like camelCase, but the first word is capitalised too.
• snake_case — lowercase words joined with underscores.
• kebab-case — lowercase words joined with hyphens.
• CONSTANT_CASE — uppercase words joined with underscores.
• dot.case — lowercase words joined with dots.
• path/case — lowercase words joined with slashes.
• aLtErNaTiNg — alternating upper and lowercase letters.
• iNVERSE cASE — every letter flips its case.
• reversed text — the whole string mirrored backwards.
• trim spaces — removes extra spaces and trims each line.

Key features

• 15 conversion styles covering everyday writing and programming naming conventions.
• Smart word splitting — punctuation, hyphens, underscores and existing camelCase boundaries are all detected, so foo-bar_bazQux becomes foo_bar_baz_qux.
• Live statistics — word, character and line counts for both the input and the output.
• One-click copy & paste with a clipboard fallback for older browsers.
• Chain conversions — send the result back to the input with Use as input and keep transforming.
• Light & dark theme that remembers your choice.
• Keyboard shortcut — press Ctrl + Enter to copy the output.
• Responsive layout that works on desktop, tablet and mobile.

How to use

1. Type or paste your text into the Input box (or click Paste).
2. Click any button in the Convert to grid.
3. Read the result in the Output box, then press Copy to grab it.
4. Optional: press Use as input to convert the result again, or Clear to start over.

Who is it for?

Developers renaming variables, classes and files; writers and marketers fixing headlines; students formatting titles; SEO and data-entry professionals normalising large amounts of text — anyone who regularly needs text in a specific case style.

Privacy & performance

The tool is built with plain HTML, CSS and JavaScript — no frameworks, no build step and no server calls. All conversion happens locally in your browser, so it works fully offline and your text never leaves your device.