Convertisseur de casse de texte

Convertir le texte entre MAJUSCULES, minuscules, camelCase, snake_case, kebab-case et plus encore

Fix broken capitalization instantly without retyping. Paste once, choose target style, and copy clean output.

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Formats de casse
Convertir en 14+ styles de texte
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Suivi de la longueur du texte en temps réel
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Conversion active
Affiche le dernier format sélectionné
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Conversions
14+

À propos de la conversion de texte en majuscules et minuscules

Convertir du texte pour l’écriture, le codage, les conventions d’attribution de noms, la mise en forme SEO et le nettoyage de contenu avec une large gamme de styles de majuscules et de minuscules.

Écriture et édition
Corriger rapidement les titres, les paragraphes et la mise en forme des phrases sans éditer manuellement le texte.
Utile pour les développeurs
Générer camelCase, PascalCase, snake_case, kebab-case et CONSTANT_CASE pour les noms de variables et de fichiers.
Convertir instantanément
Basculer entre plusieurs styles de casse en un clic et comparer le résultat immédiatement.
Copier ou télécharger
Copier le résultat converti dans le presse-papiers ou le télécharger sous forme de fichier texte brut.

Related tools

Fix broken capitalization in seconds. Convert text between uppercase, lowercase, title case, sentence case, camelCase, and more without retyping.

What Is a Text Case Converter?

A text case converter transforms capitalization styles in existing text. Instead of manual editing, it applies deterministic rules to every character.

This is useful for emails, headings, CSV exports, code identifiers, and copied text with accidental CAPS LOCK.

SnapToolsOnline supports many case formats and keeps your content local in the browser.

Supported Conversion Types

TypeTypical output styleCommon use
Uppercase / LowercaseALL CAPS or all lowercaseQuick cleanup
Sentence / Title caseNatural headline or sentence styleArticles and docs
camelCase / PascalCasedeveloperNamingStyleCode variables and classes
snake_case / kebab-case / dot.caseword_delimitersFiles, URLs, configs
Toggle / InversemIXeD transformationsRepair mistyped text

How to Use the Converter

  1. Paste your source text into the input panel.
  2. Choose a conversion type from the available buttons.
  3. Review the output panel instantly after conversion.
  4. Copy or download the converted result.

Line breaks, punctuation, numbers, and symbols are preserved while letter case is transformed.

Use Case 1: Fix accidental CAPS email

A support reply typed with Caps Lock can be normalized to sentence case in one click, avoiding manual rewrite.

Use Case 2: Convert naming style for code

Developers can switch identifiers between camelCase, snake_case, and kebab-case when moving data between APIs and config files.

Common Mistakes

MistakeWhy it happensFix
Wrong target formatMany options look similarPreview output before copying
Converting partial snippetsOnly selected text changedPaste full block first
Expecting grammar correctionTool changes case, not meaningProofread after conversion
Forgetting code sensitivitySome systems are case-sensitiveValidate identifiers after conversion

Advanced Tips

  • Use sample text button to verify behavior for each case type.
  • For titles, compare title case and sentence case before publishing.
  • When converting long text, copy output immediately to avoid accidental overwrite.
  • For code migration, test converted keys in your runtime before deploy.

Alternatives

MethodBest forLimitation
Word processor shortcutSimple uppercase/lowercaseLimited formats
Spreadsheet formulasBulk table operationsMore setup
Custom scriptsAutomated pipelinesRequires coding
SnapToolsOnlineFast manual conversionBrowser-based workflow

Paste text above, choose your target format, and copy the corrected result in one click.

FAQ

What is a text case converter?
A tool that changes capitalization style in existing text without retyping.
Is this converter free?
Yes. It is free and does not require signup.
Does it work on mobile?
Yes, it works in modern mobile and desktop browsers.
Will line breaks be preserved?
Yes, line breaks and spacing are preserved in conversion output.
Can I convert to camelCase and snake_case?
Yes, both are supported alongside many other formats.
Does the tool store my text?
No. Processing runs locally in your browser.
What is the difference between title case and sentence case?
Title case capitalizes major words; sentence case capitalizes sentence starts.
Can I download converted text?
Yes, you can export the result directly from the tool.
Can this fix grammar errors?
No. It changes capitalization only.
Can I use it for code naming formats?
Yes, it supports common developer naming conventions.
Text Case Converter - Change Case in One Click | SnapToolsOnline