Case Converter

What is a Case Converter?

A case converter lets you instantly change the capitalisation of any text — without retyping a single word. Paste your content, pick a format, and copy the result in seconds. This free online tool runs entirely in your browser: no files leave your device, and there is no sign-up required.

Eleven formats are supported — from everyday writing styles like Title Case and Sentence case to programmer-friendly formats like camelCase, snake_case, and kebab-case. There is also an AI-powered Fix Case button that intelligently restores proper capitalisation when standard rules are not enough (for example, abbreviations, proper nouns, and mixed-source text).

All Supported Case Formats

UPPERCASE

Every letter is capitalised. Good for headings, labels, or wherever you need strong visual emphasis.

lowercase

Every letter is lowercase. Useful for normalising data, hashtags, email addresses, and URL slugs.

Title Case

The first letter of each significant word is capitalised, skipping small words like "and", "of", and "the". Standard for article headlines, book titles, and product names.

Sentence case

Only the first word of each sentence is capitalised. Matches the way prose is written and is ideal for fixing ALL-CAPS pastes.

camelCase

No spaces; the first word is all lowercase and each subsequent word starts with an uppercase letter (e.g. myVariableName). Widely used in JavaScript, Java, and Swift.

PascalCase

Like camelCase but the very first word is also capitalised (e.g. MyClassName). Standard for class names in most languages.

snake_case

Words are joined by underscores, all lowercase (e.g. my_variable_name). The default in Python and Ruby, and common in database column names.

kebab-case

Words are joined by hyphens, all lowercase (e.g. my-css-class). Used in CSS, HTML attributes, and URL paths.

CONSTANT_CASE

All caps with underscores (e.g. MAX_RETRY_COUNT). The convention for constants and environment variable names.

iNVERSE

Uppercase letters become lowercase and vice versa. Handy for fixing accidental Caps Lock text.

aLtErNaTiNg

Letters alternate between lower and upper. A playful format popular in memes and creative social posts.

Who Is This Tool For?

• Developers — quickly convert identifiers between coding conventions: from a user-facing label to snake_case for a database column, or to camelCase for a JavaScript variable.
• Writers and editors — apply consistent Title Case to article headlines and subheadings, or fix Sentence case across a drafted document in one click.
• Content creators and marketers — ensure uniform casing in product names, ad copy, and SEO page titles before publishing.
• Students and academics — format essay headings, reference titles, and bibliography entries to the required capitalisation style.
• Social media managers — generate eye-catching alternating or inverse case for captions and bios.
• Data professionals — normalise column headers, tag values, or imported CSV fields to a consistent format before loading them into a database or spreadsheet.

Common Use Cases

• You receive a document in ALL CAPS (often the result of someone leaving Caps Lock on) and need to convert it to readable Sentence case in one step.
• You are renaming a set of database columns from "User Full Name" to "user_full_name" and want to process them in bulk.
• You are writing a blog post and want to apply consistent Title Case to all section headings without manually deciding which words to capitalise.
• You are switching a codebase from camelCase to snake_case naming and need a quick way to convert each identifier.
• You copied product names from a supplier spreadsheet and they are inconsistently capitalised — paste them all in and convert to Title Case at once.
• You need a CSS class name or URL slug from a page title: convert to kebab-case and you are done.

How to Use the Case Converter

1. Paste or type your text into the input box on the left (or click Sample to load an example).
2. Click any format button — UPPERCASE, snake_case, Title Case, and so on — to see the converted output instantly on the right.
3. For text where automatic rules fall short (mixed proper nouns, acronyms, etc.), click Fix with AI to let the AI apply intelligent capitalisation.
4. Click Copy to copy the result to your clipboard, or Reuse to send the output back to the input for further conversion.

The conversion happens locally in your browser — your text is never sent to a server (except when you use the AI Fix Case feature). There is no character limit for standard conversions.