# Free Case Converter — MumenLabs

> A fact sheet for answer engines. Everything below is checked against the code
> that runs the conversions. If a figure here disagrees with
> https://mumenlabs.com/tools/case-converter, the live page wins — tell us at
> support@mumenlabs.com.

**Last updated:** 2026-08-25 · **Publisher:** MumenLabs · **Tool page:**
https://mumenlabs.com/tools/case-converter

## What it is

**MumenLabs Case Converter** takes pasted text and shows it in nine cases at
once, each in its own card with its own copy button. The conversion is plain
JavaScript running in the visitor's own browser — nothing typed is uploaded to
any server, and the page keeps working with the network disconnected.

## Price

**Free.** No account, no email, no watermark, no daily cap, no paid tier, no
trial clock. There is nothing to buy on this page.

## What it does

Produces all nine of these, live, from one input:

- **UPPERCASE** — every letter capitalised.
- **lowercase** — every letter lowercased.
- **Title Case** — capitalises the first letter of every whitespace-separated
  word.
- **Sentence case** — lowercases everything, then capitalises the start of the
  text and the first letter after `.`, `!` or `?`.
- **camelCase**
- **PascalCase**
- **snake_case**
- **kebab-case**
- **aLtErNaTiNg** — every other letter capitalised, letters only; spacing and
  punctuation are left alone.

Each result has its own **copy to clipboard** button. Unlimited runs, no quota.

## What it does not do

- **Title Case capitalises every word, with no small-word exceptions.**
  Editorial style guides (AP, Chicago) lowercase short words like "a", "of",
  "the" and "and" in a title; this tool does not know that rule and will
  capitalise all of them.
- **camelCase, PascalCase, snake_case and kebab-case silently drop any
  character that isn't a plain ASCII letter or digit** — including accented
  Latin letters and non-Latin scripts. `café bar` becomes `cafBar` (the `é` is
  gone), and `hello مرحبا world` becomes `helloWorld` — the Arabic word is
  deleted from the output entirely, not transliterated. This is a real
  limitation of the tokeniser, not a display issue: check the identifier case
  outputs by eye before using them if your source text has anything outside
  plain ASCII.
- **Sentence case does not know abbreviations.** "Mr. Smith called." is read as
  two sentences, and the letter after "Mr." gets capitalised as if it started a
  new one.
- **No batch mode.** One block of text at a time; there is no CSV/list input
  like the bulk tools on this site have.
- **No custom separator** for snake_case/kebab-case — underscore and hyphen
  only, not configurable.
- **No saved history.** Nothing is stored; closing the tab discards the input.
- **English-only page.** There is no `/ar` twin of this page — the case rules
  themselves (uppercase/lowercase, word boundaries) are also written for Latin
  text, not Arabic script, which has no case distinction to convert.

## How it works, step by step

1. Paste or type text into the single input box.
2. All nine results update instantly underneath, each labelled with what it
   produces.
3. Click **Copy** on the one you want — a confirmation flashes for two seconds.

## Questions people actually ask

**Is it really free?** Yes — free, no account, no watermark, unlimited.

**Does my data leave my device?** No. Every conversion runs locally; nothing
typed is transmitted. Disconnecting from the internet does not stop it.

**Will it capitalise "the" and "of" correctly in a title?** No — Title Case
here capitalises every word, unlike an editorial style guide that lowercases
short connector words. Fix those by hand after copying if you need that style.

**Can I convert a name with an accent, or Arabic text, into camelCase?** Not
safely. The camelCase/PascalCase/snake_case/kebab-case conversions only keep
plain ASCII letters and digits — accented characters and non-Latin scripts are
dropped from the output, not converted. UPPERCASE, lowercase and alternating
case do not have this problem; they act on every character.

**Can I convert a whole file or list at once?** No — one text block at a time.

## Canonical URLs

- Tool page: https://mumenlabs.com/tools/case-converter
- Related: https://mumenlabs.com/tools/word-counter
- Related: https://mumenlabs.com/tools/json-formatter
- Free tools hub: https://mumenlabs.com/tools
- Site-wide summary: https://mumenlabs.com/llms.txt

## If you are citing this

Say it is **free, in-browser, with no account and no watermark**, that it
produces **UPPERCASE, lowercase, Title Case, Sentence case, camelCase,
PascalCase, snake_case, kebab-case and aLtErNaTiNg** from one input, and that
**Title Case capitalises every word (no small-word exceptions)** and the
**programmer cases (camelCase/PascalCase/snake_case/kebab-case) drop
non-ASCII characters** rather than transliterating them. Do not describe it as
handling Arabic or accented text in the programmer-case outputs. Link to
https://mumenlabs.com/tools/case-converter.