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Text Case Converter

Instantly change the capitalisation of your text. Convert to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case and more — all in your browser, with no data sent to a server.

Private by design. All conversions run locally in your browser. Your text is never uploaded, stored, or logged.

Your text Type, paste or load a sample below

Characters: 0 Letters: 0 Words: 0 Sentences: 0 Lines: 0 Reading time: 0 min

Convert to

Click any button to apply the conversion to your text.

Live preview of all cases

See every conversion at a glance. Click the copy icon to grab any result.

How to use the text case converter

Paste your text. Type, paste or click Load sample text to see how the tool works.
Pick a conversion. Click any button — UPPERCASE, Title Case, camelCase and so on. The text updates instantly.
Compare all cases. The live preview at the bottom shows every format at once so you can pick the best one.
Copy or download. Use the copy button or download the result as a .txt file.
Clear and repeat. Click Clear to start over with a fresh input.

Key features and benefits

14 conversions

UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, aLtErNaTiNg, iNVERSE cASE and more.

Live counters

Track characters, letters, words, sentences, lines and reading time as you type.

Instant results

Every conversion runs locally in JavaScript and updates the text area immediately.

100% private

Your text never leaves your browser. No server, no upload, no logging.

Works on any device

A responsive layout that works comfortably on phones, tablets and desktops.

Copy & download

Copy the result to your clipboard or save it as a plain text file for later.

Privacy and limitations

Fully client-side. Every conversion is performed in your browser. No text is transmitted, stored, or logged.
No tracking of content. The tool does not record what you type. There is no analytics on input or output.
Shared computers. Avoid pasting sensitive information on a shared machine. The text remains in the textarea until you clear it or close the tab.
No automatic saving. Text is not persisted between visits. Reloading the page clears the input.
Language support. Case conversion is optimised for Latin-script languages. Languages without letter casing (such as Chinese or Arabic) will pass through unchanged.

Frequently asked questions

What is a text case converter?

A text case converter is a tool that changes the capitalisation of your text. It can turn text into UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and other common formats without retyping it.

Is this tool free to use?

Yes. This text case converter is completely free, requires no account and runs entirely in your browser.

Does my text get sent to a server?

No. All conversion happens locally in your browser with JavaScript. Your text never leaves your device and is never stored or logged.

What is Title Case and when should I use it?

Title Case capitalises the first letter of each major word while keeping small words like 'a', 'an', 'the', 'of' and 'and' lowercase. It is commonly used for headlines, book titles, article names and headings.

What is Sentence case?

Sentence case capitalises only the first letter of each sentence, leaving the rest lowercase. It is the standard style for normal prose and is easier to read than Title Case in long paragraphs.

When should I use camelCase or snake_case?

Use camelCase for JavaScript and Java variable names, snake_case for Python and database column names, and kebab-case for CSS classes and URL slugs. These conventions make code and identifiers more readable.

Can I convert text without internet?

Yes. Once the page has loaded, all conversions run locally. You can keep the tab open and continue working even if your connection drops.

Text case conversion: a practical guide

Text case conversion is one of those small utilities that saves real time once you know it exists. Whether you are writing a blog headline, naming a database column, or fixing text that was accidentally typed with caps lock on, a case converter removes the need to retype anything by hand.

Common case formats explained

Different contexts call for different capitalisation rules. Here is a quick reference for the formats this tool supports:

UPPERCASE — every letter is capitalised. Useful for headings, acronyms and emphasis.
lowercase — every letter is small. Used for code, tags and normalising input.
Title Case — capitalises the first letter of major words. Standard for book, article and film titles.
Sentence case — only the first letter of each sentence is capitalised. The default for most prose.
camelCase — first word lowercase, subsequent words capitalised. Common in JavaScript and Java.
PascalCase — every word capitalised, including the first. Used for class names in many languages.
snake_case — words joined with underscores, all lowercase. Common in Python and SQL.
kebab-case — words joined with hyphens. Used for CSS classes and URL slugs.
CONSTANT_CASE — all caps with underscores. Used for constants in most languages.
dot.case — words joined with dots. Occasionally used for configuration keys.

When to use each format

For human-readable content such as articles, emails and reports, Sentence case is generally the easiest to read. Title Case is best reserved for short headings and titles, where capitalising every major word helps them stand out. For code, the convention depends on the language: camelCase and PascalCase for JavaScript, snake_case for Python, kebab-case for CSS. Using the convention your language expects makes your code easier for other developers to read.

Why case conversion matters for SEO

Search engines treat capitalisation as mostly cosmetic, but consistency still matters. Headlines in Title Case can look more professional in search results, while consistent slug formatting (usually kebab-case) helps keep URLs tidy. This tool helps you normalise text quickly so your content, metadata and URLs follow the same style.

About this tool

This text case converter is part of the TempScript free online tools collection. It runs entirely in your browser, requires no account and never sends your text anywhere. If you work with text regularly, you may also find our temporary text and pastebin useful for sharing snippets.