Optasis Tools

📝 Case Converter & Text Cleaner

Convert text to Upper Case, Lower Case, Title Case, and more instantly.

0 Characters 0 Words
Case Converter Guide

Usage Guide: Which Mode Should I Use?

Not sure which button to click? Here is a quick style guide for standard formatting.

Aa
Title Case

What it does: Capitalizes the First Letter of Every Word.

Best for: Headers, Book Titles, Names

★ Essential for Excel lists

A..
Sentence case

What it does: Capitalizes only the first letter of a sentence and proper nouns.

Best for: Emails, Social Posts, Articles
AA
UPPER CASE

What it does: CONVERTS EVERYTHING TO CAPITALS.

Best for: Acronyms (NASA), Warnings
aa
lower case

What it does: converts text to small letters.

Best for: Email Lists, Tags, Code
aA
aLtErNaTiNg

What it does: tUrNs tExT iNtO tHiS (Randomized caps).

Best for: Memes, Stylistic Bios

Is my text saved on your server?

No. This tool runs 100% in your browser using JavaScript. Your text never leaves your computer, so it is perfectly safe to use for sensitive documents, emails, or private data.

Frequently Asked Questions

Does this work with Excel?

Yes. You can copy a column from Excel, paste it here, click “Title Case,” and paste it back. It is often much faster than writing and dragging a =PROPER() formula.

Is there a character limit?

There is no hard limit, but browser performance may slow down if you paste more than 50,000 words at once. For standard articles, lists, and documents, conversion is instantaneous.