How to Change Text Case (UPPERCASE, lowercase, Title Case)

Retyping text just to fix its capitalization is a waste of time, yet it happens constantly — a heading pasted in all caps, a title that needs proper case, a sentence that arrived SHOUTING. Converting case transforms text between uppercase, lowercase, title case, and more in one click. This guide explains the case types, where each belongs, and the title-case rules that trip people up.

The main case types

• UPPERCASE — every letter capital. For emphasis, acronyms, or constants in code. Reads as shouting in prose, so use sparingly.
• lowercase — every letter small. For a casual tone, or normalizing text before processing.
• Title Case — Major Words Capitalized. For headings, titles, and names.
• Sentence case — Only the first letter capitalized. For normal prose and most body text.

How to convert case with this tool

1. Open the Convert Case tool.
2. Paste your text.
3. Choose the case you want.
4. Copy the converted text.

Everything runs in your browser — nothing is uploaded.

Title case is trickier than it looks

Title case has rules people rarely apply consistently by hand. The convention most style guides follow:

• Capitalize the first and last words, and all major words — nouns, verbs, adjectives, adverbs.
• Lowercase short words in the middle: articles (a, an, the), short conjunctions (and, but, or), and short prepositions (in, on, of, to) — *unless* they are the first or last word.

So "the lord of the rings" becomes "The Lord of the Rings" — note the lowercase "of" and "the" in the middle but the capital "The" at the start. A converter applies these rules consistently, which is hard to do reliably by eye.

Practical uses

• Fix ALL-CAPS text someone sent by pasting and converting to sentence case.
• Format headings to title case in one step.
• Normalize data to lowercase before comparing or de-duplicating.
• Clean up dictated or OCR'd text with inconsistent capitalization.

A note on data cleaning

Converting to lowercase is a common first step before matching or de-duplicating text, because "Apple" and "apple" are different strings to a computer. Normalize case, then process. Pair with Remove Duplicate Lines after lowercasing to catch case-variant duplicates.

Related tools

Clean pasted text with Remove Formatting and Remove Extra Spaces alongside case conversion. Fixing a whole list? Sort Lines organizes it after normalizing case.

Common uses

• Undo accidental caps lock.
• Format titles and headings.
• Normalize text for processing.
• Standardize inconsistent capitalization.

Privacy and limits

Conversion is fully local — no upload, nothing stored, offline once loaded. Open the Convert Case tool to fix your capitalization.