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Convertisseur de Casse — Outil en ligne gratuit

MAJUSCULES, minuscules, Casse Titre, camelCase et plus

Convertis ton texte en MAJUSCULES, minuscules, Casse Titre, camelCase, snake_case. Gratuit, instantané, dans ton navigateur.

Input: 0 chars Output: 0 chars
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Free text case converter — 12 styles in one tool

Outilolis Case Converter converts text between 12 case styles instantly — UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, path/case, and aLtErNaTiNg. Built for writers, developers, and marketers who need fast, accurate case transformation.

All 12 case styles at a glance

  • UPPERCASE — All characters capitalized
  • lowercase — All characters lowercased
  • Title Case — First letter of each word capitalized
  • Sentence case — First letter of each sentence capitalized
  • camelCase — firstNameLastName (JavaScript variables)
  • PascalCase — FirstNameLastName (classes, React components)
  • snake_case — first_name_last_name (Python, SQL)
  • kebab-case — first-name-last-name (URLs, CSS classes)
  • CONSTANT_CASE — FIRST_NAME_LAST_NAME (environment variables)
  • dot.case — first.name.last.name (config keys)
  • path/case — first/name/last/name (file paths)
  • aLtErNaTiNg — Every other character flipped (memes, sarcasm)

How to use this tool

  1. 1

    Paste your text

    Enter or paste any text into the input area. You can change or re-type at any time — conversions happen live.

  2. 2

    Choose a case style

    Tap one of the 12 case buttons: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, path/case, or aLtErNaTiNg.

  3. 3

    Copy the converted output

    The converted text appears instantly. Click Copy to send it to your clipboard, or switch to a different case style to compare options.

Who uses text case converters?

  • Développeurs converting between naming conventions when refactoring or porting code
  • Writers fixing ALL-CAPS pastes, creating proper book titles, normalizing headlines
  • Marketers standardizing campaign names, URL slugs, and social captions
  • SEO specialists creating URL-friendly kebab-case slugs from titles
  • Data analysts normalizing column names for database imports

Frequently Asked Questions

What is Title Case exactly?
Title Case capitalizes the first letter of each word. Nonte: strict AP/Chicago style keeps short articles and prepositions (a, the, of) lowercase — this tool capitalizes every word for simplicity. For headline style, review the output manually.
What is camelCase vs PascalCase?
camelCase starts with a lowercase letter and capitalizes each subsequent word: firstName. PascalCase capitalizes the first letter too: FirstName. JavaScript variables typically use camelCase; class names use PascalCase.
When should I use snake_case vs kebab-case?
Use snake_case for Python variables, database column names, and environment variable file names. Use kebab-case for URLs, HTML attributes, CSS class names, and CLI flags.
Does the converter handle special characters?
Yes. Accented letters (é, ñ, ü), emojis, numbers, and punctuation are preserved. Only letter case and separators are changed. For camelCase / kebab-case conversions, spaces and underscores are treated as word boundaries.
Is my text private?
Completely. The entire conversion runs in your browser using JavaScript string methods. Nonthing is sent to any server, nothing is logged.
Can I convert very long text?
Yes — the tool handles text up to several megabytes without lag. Conversion is O(n) complexity, meaning a 10 MB document converts in under a second on modern devices.

À retenir

  • Case Converter is a free, browser-based text tool — uppercase, lowercase, title case, camelcase & more.
  • Non signup, no downloads, no file uploads — your data stays on your device.
  • Works on desktop, tablet, and mobile. Install as a PWA for offline access.

How to Use Case Converter

  1. Open the tool: Launch Case Converter on Outilolis — no account or download needed.
  2. Enter your data: Paste text, enter values, or select a file directly in your browser.
  3. Get instant results: Everything is processed locally — results appear immediately.
  4. Copy or download: Save your output or share it. Bookmark for quick access next time.

Case Converter — Quick Facts

Prix
Gratuit — sans limites, sans filigrane, sans paywall
Confidentialité
100% dans le navigateur — aucune donnée n’est envoyée à un serveur
Plateforme
Tout navigateur moderne — desktop, tablette ou mobile
Catégorie
Text Outils on Outilolis
Hors ligne
Works offline after first visit (Progressive Web App)
CaractéristiqueDétails
OutilCase Converter
CatégorieText
Inscription requiseNon
Téléversement de fichierAucun — traité dans le navigateur
Compatible mobileEntièrement adaptatif
CoûtGratuit pour toujours

Why Use Case Converter?

You should try Case Converter for a quick, private way to uppercase, lowercase, title case, camelcase & more. All processing happens in your browser. Your files and data never leave your device. According to web.dev, client-side processing is the gold standard for privacy.

On the other hand, dedicated APIs or desktop tools suit batch processing better. They also handle server-side automation. For everyday tasks, browser tools offer the best speed, privacy, and convenience.

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100% Confidentialité. Cet outil fonctionne entièrement dans votre navigateur. Vos données ne sont jamais envoyées à un serveur.