Case Converter

Case Converter takes whatever text you type or paste and instantly shows it in eight different letter cases at the same time: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, and AlTeRnAtInG case. There is no convert button to press. As soon as text is in the box, every version appears below it, and each one has its own Copy button. Everything runs in your browser, so nothing you type is sent anywhere.

Input Text

Enter some text above to see all case conversions

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Why use Case Converter?

Case Converter is a single-screen text tool. You put text into the Input Text area at the top, and it immediately renders that same text in eight letter cases underneath. There is no dropdown to pick a target format and no run button, because the tool computes every format at once and keeps them all visible. Each result sits in its own row with a small label above it and a Copy button on the right, and a Clear button appears once you have entered something so you can wipe the box and start fresh. The eight formats cover both everyday writing and code naming conventions. UPPERCASE and lowercase are straightforward letter shifts. Title Case capitalizes the first letter of each word, while Sentence case capitalizes only the first letter following a period, exclamation mark, or question mark. camelCase removes spaces and other separators and capitalizes the letter that follows each one, producing a joined identifier. snake_case and kebab-case both lowercase the text and swap runs of spaces for underscores or hyphens respectively, which is handy for keys, slugs, and file names. The eighth option, AlTeRnAtInG, flips each character between lower and upper case for a stylized effect. Because the conversions are plain JavaScript running on the page, the tool works entirely in your browser and does not send your text to any server. That also means the results update instantly as you edit, so you can tweak a phrase and watch every version change in real time. When you find the format you want, the per-row Copy button places just that version on your clipboard and briefly confirms with a checkmark, so there is no need to select and highlight text by hand.

Key benefits

Shows all eight case styles side by side, so you never have to run separate conversions to compare them
Converts live as you type with no button to click and no page reload
Each format has its own Copy button with a checkmark confirmation, so you grab exactly the version you need
Handles programming naming styles like camelCase, snake_case, and kebab-case alongside everyday cases like Title Case and Sentence case

Features

Eight simultaneous outputs: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, and AlTeRnAtInG
Title Case capitalizes the first letter of every word; Sentence case capitalizes the first letter after each period, exclamation mark, or question mark
camelCase joins words by removing separators and capitalizing the following letter; snake_case and kebab-case lowercase everything and swap runs of spaces for underscores or hyphens
Multi-line input supported through a five-row text area that accepts pasted paragraphs
One-click Copy per result plus a Clear button to reset the input

Popular use cases

Developers reformatting variable, function, or file names into camelCase, snake_case, or kebab-case
Writers and editors fixing headings or titles that were typed in all caps or all lowercase
Turning a phrase into a URL-friendly kebab-case slug or a database-friendly snake_case key
Quickly normalizing pasted text to Sentence case before dropping it into a document or email

How to use Case Converter

1
Enter your text
Type or paste your text into the Input Text box at the top of the tool. The results update as you type, so there is no separate convert step.
2
Read the eight case versions
Below the box, your text appears in all eight formats at once: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, and AlTeRnAtInG.
3
Copy the one you want
Click the Copy button next to any format. It briefly shows a checkmark and Copied to confirm the text is on your clipboard.
4
Reset when done
Click Clear below the results to empty the input box and start over with new text.

Frequently asked questions

Do I need to click a convert button?

No. The tool converts your text the moment you type or paste it, and all eight case versions appear automatically below the input box.

Which cases can it produce?

Eight in total: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, and AlTeRnAtInG case where letters flip between lower and upper.

How is Title Case different from Sentence case here?

Title Case capitalizes the first letter of every word. Sentence case only capitalizes the first letter of each sentence, meaning the first letter after a period, exclamation mark, or question mark.

Can I convert several lines or a whole paragraph at once?

Yes. The input is a multi-line text area, so you can paste multiple lines or a full paragraph and every format applies to the whole thing.

Is my text uploaded to a server?

No. All conversion happens in your browser using local JavaScript, so the text you enter never leaves your device.

How do I copy a result?

Click the Copy button next to the format you want. It shows a checkmark and Copied for a moment to confirm the text was placed on your clipboard.

Last reviewed: July 2026

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