Case Converter — Uppercase, Lowercase, camelCase & More — Free Online Tool

Case Converter — Uppercase, Lowercase, camelCase & More — Free Online Tool. Free online case converter. Instantly convert text to uppercase, lowercase, camelCase, snake_case, PascalCase, kebab-case, Title Case, and capitalize text — 100% offline.

Convert text between any naming convention instantly with our free online case converter .

Enter any phrase and get it transformed into camelCase , snake_case , PascalCase , kebab-case , CONSTANT_CASE , Title Case, dot.case, path/case, Sentence case, and more — all at once, no settings needed.

Essential for developers renaming variables, database columns, or API fields, and for writers formatting headings. All processing happens locally in your browser — your text is never sent to a server. Which case should you use?

camelCase is the standard for JavaScript variables and function names. snake_case is preferred in Python, Ruby, and SQL column names. PascalCase (aka UpperCamelCase) is used for class names and React components.

kebab-case is the convention for CSS classes, HTML attributes, and URL slugs. CONSTANT_CASE is for environment variables and constants. Title Case capitalizes the first letter of every word — used for headings and document titles.

Our tool outputs all of these at once so you can copy whichever you need.

Frequently asked questions

How do I convert text to camelCase or snake_case?

Type or paste your text into Your string. Every format is generated at once: for user account id, Camelcase gives userAccountId, Snakecase gives user_account_id and Pascalcase gives UserAccountId. Click the copy icon next to the format you need.

Which case formats are available?

Lowercase, Uppercase, Camelcase (camelCase), Capitalcase (Title Case), Constantcase (CONSTANT_CASE), Dotcase (dot.case), Headercase (Header-Case), Nocase (plain lower case words), Paramcase (kebab-case), Pascalcase (PascalCase), Pathcase (path/case), Sentencecase (Sentence case), Snakecase (snake_case) and Mockingcase (AlTeRnAtInG letters).

Are numbers and acronyms kept?

Yes. Digits stay in every format, so version 2 api becomes version2Api in Camelcase and version_2_api in Snakecase. Symbols and punctuation are treated as word breaks. Acronyms written in capitals, such as API, are kept in Capitalcase, Headercase and Sentencecase, while Camelcase and Pascalcase normalise them to api and Api.

Can I use it as a title case converter?

Capitalcase capitalises the first letter of every word, which gives simple title case: the lord of the rings becomes The Lord Of The Rings. It does not keep short words such as of or the in lower case. Acronyms such as API stay in capitals, unless your whole text is typed in capitals.

Can I share the converted text?

Yes. Copy link copies a URL that contains your input, so opening it restores the same text and conversions. Apart from that link, everything runs in your browser and your text is not uploaded.

How to use this online tool

Case Converter — Uppercase, Lowercase, camelCase & More — Free Online Tool is designed for fast browser workflows when you need to format, validate, convert, decode, encode, generate, or inspect data without opening a heavy desktop app. Start with the input field or visible options, review the result, then copy or download the output for the next step.

Private processing in your browser

Case Converter — Uppercase, Lowercase, camelCase & More — Free Online Tool keeps the normal processing step local in your browser. That is useful for code snippets, tokens, documents, configuration values, text samples, and other material that should not be sent to a remote service unless you explicitly choose to share it.

When this tool is useful

Use Case Converter — Uppercase, Lowercase, camelCase & More — Free Online Tool for repeatable developer tasks, technical documentation, QA checks, quick conversions, debugging, content cleanup, and internal team workflows. The page focuses on clear inputs, immediate feedback, and output that is easy to reuse in code, reports, tickets, emails, or notes.

Practical tips

Before copying the final result, check important details such as spacing, casing, filenames, encoding, token structure, line breaks, or output format. Small checks prevent mistakes when the result is reused in source code, API requests, documentation, spreadsheets, or shared files.