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ToolBoxGenie

Case Converter

Text Tools · Added 9 July 2026

Retyping a headline because it arrived in ALL CAPS is a waste of a perfectly good afternoon. Paste the text, click a case, and copy the result. Programmer cases such as camelCase and snake_case are included alongside the editorial ones.

Convert to

How to use the case converter

  1. 1Paste your text into the box.
  2. 2Click the case you want — the output appears underneath immediately.
  3. 3Use Copy to take the result, or Swap to move it back into the input for a second pass.
  4. 4Reset clears both boxes.

Examples

Fixing a shouted headline

Input
BREAKING NEWS FROM THE CITY COUNCIL
Result
Sentence case → Breaking news from the city council

Making an identifier

Input
user profile image url
Result
camelCase → userProfileImageUrl · snake_case → user_profile_image_url

About the case converter

Case conventions in code

Naming conventions are not decoration — they carry information. Seeing MAX_RETRIES tells a reader it is a constant; seeing UserAccount tells them it is a type. Consistency is what makes that signal readable, which is why linters enforce it.

Different ecosystems settled on different defaults: camelCase in JavaScript and Java, snake_case in Python and Ruby, kebab-case in CSS and URLs, SCREAMING_SNAKE_CASE for constants nearly everywhere. When crossing a boundary — say, mapping a JSON API onto a Python model — pick one side to convert on and do it in a single place.

Why ALL CAPS is bad for readers

Capital letters occupy a uniform rectangular envelope, which removes the ascenders and descenders that let the eye recognise word shapes at a glance. Long stretches of capitals measurably slow reading and are harder for people with dyslexia.

Reserve capitals for very short labels — a button, an acronym, a single-word warning. For anything longer, use weight, size or colour to create emphasis instead.

Frequently asked questions

What is the difference between Title Case and Sentence case?
Title Case capitalises the first letter of each significant word — 'The Rise of the Machines'. Sentence case capitalises only the first word and proper nouns — 'The rise of the machines'. Most publications use one or the other consistently; mixing them looks careless.
Which small words stay lowercase in Title Case?
This tool follows the common convention of lowercasing articles, coordinating conjunctions and short prepositions — a, an, the, and, but, or, for, nor, of, in, on, at, to, by — unless they are the first or last word. House styles differ, so check yours for edge cases.
What is the difference between camelCase and PascalCase?
Both join words without separators, but camelCase starts lowercase (userName) and PascalCase starts uppercase (UserName). By convention camelCase names variables and functions, while PascalCase names classes and types.

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