What we do

Convert Case Online is a free, browser-based text case converter supporting fourteen formats — from everyday sentence case and title case to developer conventions like camelCase and snake_case. Paste your text, click a button, done. No software to install, no account to create.

Why we built it

It started with accidentally writing a whole paragraph in caps lock and having no quick way to fix it. Retyping felt absurd. Every tool we found either wanted an account, buried the buttons under ads, or quietly uploaded the text to a server. We built this so nobody ever has to retype text just to change its capitalisation — and so nobody has to wonder where their text went.

Our principles

Free, always. No premium tier, no paywalled features.
Private by design. Every conversion happens in your browser. Your text never leaves your device — see our privacy policy.
No friction. No sign-up, no download. Open the page, use the tool.
Fast. Conversions are instant even on large documents, because there is no network round trip.
Accessible. Keyboard-navigable, screen-reader friendly, and readable on any screen size.

Who uses it

Writers and editors fixing formatting after pasting from PDFs, emails, and CMS exports.
Developers converting identifiers between naming conventions in bulk.
Students formatting essay titles and citations correctly.
Marketers formatting ad copy, subject lines, and captions.
Data teams normalising name columns and generating URL slugs.
Anyone who left caps lock on.

How it works

The whole tool is client-side JavaScript. When you click a case button, the transform runs against the text in your browser's memory and writes the result straight back into the box. There is no API call, no request body, and no server-side log of your content. The only data our servers ever see is the standard request for the page itself.

Get in touch

Have a suggestion or found a bug? Send us a message →

About Convert Case Online