TontonTools

Case Converter

Convert text to UPPERCASE, lowercase, Title Case, Sentence case and more.

100% Free No signup Privacy-friendly Text Tools
Updated Sep 2026
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How to use Case Converter

  1. Paste your text into the box above.
  2. Click a case button — UPPERCASE, lowercase, Title Case, Sentence case or aLtErNaTe.
  3. Review the converted text, which replaces the original in the box instantly.
  4. Click Copy to grab the result for use anywhere.

What is Case Converter?

A case converter transforms the letter casing of text between common styles: UPPERCASE (all capitals), lowercase (no capitals), Title Case (the first letter of each major word capitalized), Sentence case (only the first letter of each sentence capitalized), and playful styles like aLtErNaTiNg case.

Changing case manually is tedious and mistake-prone, especially for long passages. A converter applies the rules consistently in an instant, which is handy for headlines, titles, CSV cleanup, and fixing text typed with the wrong Caps Lock state.

About the Case Converter

The Case Converter instantly changes the capitalization of your text without retyping a single word. Paste in any text and switch it to UPPERCASE, lowercase, Title Case, Sentence case, or aLtErNaTiNg case with one click — then copy the result.

It's a real time-saver when you've accidentally typed with Caps Lock on, need a headline in Title Case, want to clean up an all-caps paragraph, or have to normalize messy data. Writers, editors, marketers, developers and data-entry workers reach for a case converter constantly.

The tool runs entirely in your browser, so it's instant, private and free, with no limit on the amount of text you can convert.

Frequently Asked Questions

Title Case capitalizes the first letter of each major word (great for headlines), while Sentence case capitalizes only the first letter of each sentence (great for body text).
Yes — paste the all-caps text and click lowercase or Sentence case to restore normal capitalization instantly.
No. Conversion happens in your browser, so you can paste and convert very long documents.
Yes, nothing is uploaded — all conversion runs locally on your device.

Learn more

Uppercase, Lowercase and Title Case: How to Convert Text Case

Stuck retyping text to fix the capitalization? Here is what each text case means and how to convert instantly.

Read the guide

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