Case Converter

Transform text into another naming or display case. Choose the target format in tool settings. Structured cases (snake, camel, kebab, etc.) apply per line so multiline input keeps its line breaks.

  • Runs entirely in your browser
  • No data stored or sent to a server
  • Free forever — no signup
  • Instant conversion

Input and Output

Use the interactive encoder and decoder on this page to process your text.

Learn more about text

Text Case Conventions for Developers

Case Conversion

When to Convert Case

Transform identifiers and labels between naming conventions — camelCase for JavaScript variables, snake_case for Python and SQL, kebab-case for URLs and CSS, PascalCase for class names, and more. Select the target format in Tool Settings.

Real-World Examples

user profile id → userProfileId (camelCase)

UserProfileId → user_profile_id (snake_case)

HTTPHeader → http-header (kebab-case)

Common Mistakes

  • Converting acronyms inconsistently — XMLParser vs XmlParser
  • Applying case rules to sentences instead of identifiers
  • Mixing conventions within one API (snake_case JSON keys vs camelCase in docs)

Developer Tips

  • Pick one convention per language ecosystem and stick to it
  • Title Case is for headings; CONSTANT_CASE is for environment variables and enum values
  • Switch the target case tab in Tool Settings before running

Frequently asked questions

Which case formats are supported?

camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and Title Case. Select the target in Tool Settings.

How does the tool detect word boundaries?

It splits on spaces, hyphens, underscores, and transitions between lowercase and uppercase letters. Multiline input is converted line by line for structured cases.

Will converting change my string length significantly?

Case changes preserve letters. Separator style (hyphens vs underscores) affects length slightly.