Case Converter — Change Text Case Online Free

What is the Case Converter?

The case converter is a free online tool that changes the capitalisation of your text with one click. Paste in any text and instantly switch it between five styles: UPPERCASE (all capitals), lowercase (all small letters), Title Case (first letter of every word capitalised), Sentence case (normal sentence capitalisation), and aLtErNaTiNg (playful alternating capitals). A live character and word count sits under the box, and everything works in your browser — nothing is uploaded or stored.

Bad capitalisation shows up in the most annoying places: an email subject line typed in ALL CAPS, a headline that needs proper Title Case, a copied PDF passage stuck in lowercase, a social post you want to style for fun. Re-typing is slow and error-prone, and word processors often bury their case options in menus. This tool does it instantly, on any device, with no formatting to fight.

Each conversion follows simple, predictable rules. UPPERCASE and lowercase change every letter. Title Case capitalises the first letter of each word and lowercases the rest. Sentence case lowercases everything, then capitalises the first letter of the text and the first letter after each . ! or ? — matching standard English style. Alternating case flips upper/lower letter by letter, skipping non-letters so punctuation never breaks the rhythm.

How to use it (3 steps)

1. Paste or type your text. Click in the box and add the text you want to convert — a headline, a paragraph, an email subject, anything.
2. Click a case button. Choose UPPERCASE, lowercase, Title Case, Sentence case, or aLtErNaTiNg. The text converts immediately, and the counts update live.
3. Copy or clear. Click "Copy" to grab the converted text for pasting elsewhere, or "Clear" to start over.

When you'll need it (use cases)

• Headlines and titles: convert a draft headline into proper Title Case for articles, videos, and presentations.
• Email subjects: fix an ALL-CAPS subject line — which reads as shouting — into Sentence case in one click.
• Spreadsheets and databases: normalise names or entries pasted from inconsistent sources into matching case.
• Social media posts: use aLtErNaTiNg case for a playful meme-style caption, or Title Case for a polished announcement.
• Code and file names: force identifiers or labels to lowercase for consistency.
• Cleaning copied text: PDFs and websites sometimes paste in weird case; normalise it before using it in a document.

Tips for the best results

• Start from clean text. Converting ALL-CAPS text to Title Case directly can leave odd results if the original had inconsistent spacing — lowercase it first, then apply Title Case.
• Check proper nouns after Sentence case. The tool cannot know which words are names, so re-capitalise any proper nouns it lowercased.
• Title Case is for headlines, not sentences. Using it on whole paragraphs looks wrong — reserve it for titles, headings, and short labels.
• Watch the live counts. The character count helps when a platform limits length (like social bios) and the word count helps when a brief asks for a target length.