Text Case Converter

Change Text Case Instantly — Seven Styles, One Click

Retyping a paragraph because it arrived IN ALL CAPS is a uniquely modern waste of time. So is manually capitalizing forty headline words, or converting a list of labels into code-friendly identifiers. This converter transforms any text between seven case styles instantly: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and kebab-case. Paste, click a style, copy the result — all locally in your browser, with no length limits and no data leaving the page.

The Seven Styles and When Each Is Right

• UPPERCASE — headings, warnings, acronym lists, label text. Use sparingly in prose: it reads as shouting and is measurably harder to read in bulk.
• lowercase — the universal reset. The first step when normalizing shouty text, cleaning data for comparison, or preparing input for the other transformations.
• Title Case — Headlines and Titles Where Major Words Are Capitalized. This implementation follows the convention editors actually use: small words like “a”, “of”, “the” and “in” stay lowercase unless they begin or end the title.
• Sentence case — capitalizes the first letter of each sentence and lowercases the rest. The fastest fix for ALL-CAPS paragraphs and the standard for body text and most modern headlines.
• camelCase — wordsJoinedLikeThis, the variable-naming convention of JavaScript, Java and many other languages.
• snake_case — words_joined_with_underscores, standard in Python, Ruby and database columns.
• kebab-case — words-joined-with-hyphens, the convention for URLs, CSS classes and file names on the web.

How to Use It

1. Paste your text — a word, a heading, or pages of content.
2. Click the button for the target style; the result appears immediately in the output box.
3. Click another style to re-convert the same input — experiment freely, the original is preserved.
4. Copy the result with one click, or use the swap button to make the output the new input for chained transformations.

Practical Notes That Save Surprises

The developer cases (camel, snake, kebab) first split your text into words — on spaces, punctuation and existing case boundaries — then rejoin them, so “User Login Count”, “user_login_count” and “userLoginCount” all convert cleanly into any of the three styles. That boundary detection makes the tool a genuine identifier converter rather than a naive string-replacer. Sentence case capitalizes after periods, question marks and exclamation points, but it cannot know that “nasa” is an acronym or that “istanbul” is a proper noun — scan the output for names that need their capitals back. Title Case follows widely accepted editorial rules, but different style guides disagree on minor points; for strict house-style compliance, treat the output as a 95-percent draft requiring a human glance.

Everything happens client-side: paste a confidential document and convert it without a single byte leaving your machine. Combined with the Word Counter and Find & Replace tools on this site, it forms a small, fast, private text-processing bench that covers the formatting chores most people meet every week.

One scenario deserves a special mention: rescuing text typed with Caps Lock accidentally on. A paragraph of inverted case used to mean retyping; now it is two clicks — lowercase to reset, then Sentence case to restore the capitals. Combined with the swap button, which feeds the output back as input for chained conversions, the converter handles in seconds the kind of formatting accidents that used to cost real minutes of tedious correction.