Change Text Case: Free Online Case Converter

You can change text case with this free online case converter: type or paste your text, click one button, and it becomes sentence case, lower case, UPPER CASE, Capitalized Case, alternating case or inverse case. It suits writers, students, marketers and spreadsheet users who need consistent capitalization without retyping a single word.

What Does It Mean to Change Text Case?

Changing text case means rewriting the same letters with a different capitalization pattern while the words, spelling and order stay the same. Each letter is either uppercase (a capital) or lowercase, and a case style is a rule that decides which letters get which. Numbers, spaces and punctuation have no case, so they pass through untouched.

This page offers six styles. The table shows what each button does to the sample phrase the quick Brown fox.

Capitalized Case is what most people call title case, with one difference: it capitalizes every word, including small ones such as "of", "the" and "and". Keep that in mind if your style guide says otherwise.

How to Use the Change Text Case Tool

Using the tool takes one paste and one click, and the text box updates immediately. Follow these steps.

1. Click the large box labeled "Type or paste your text here to change the case" and type or paste your text.
2. Glance at the Words and Characters counters above the box. They update as you type, and the character count includes spaces.
3. Click the style you want: Sentence case, lower case, UPPER CASE, Capitalized Case, aLtErNaTiNg cAsE or InVeRsE CaSe. The converted text replaces what is in the box, and the button you used is highlighted.
4. Click another style if the first one is not right. Each button works on the text currently in the box, not on your original, so save a copy of the original first if you may need it again.
5. Click Copy to Clipboard (the label changes to "Copied!" for a moment) or click Download to save the text as a plain text file.
6. Click Clear to empty the box and start a new piece of text.

Worked Example: Cleaning Up a Rough Draft

Suppose a draft arrives with messy capitalization: my FIRST post. it covers SEO basics! do you know what a title tag is? read on. The counters show 17 words.

Click Sentence case and you get: My first post. It covers seo basics! Do you know what a title tag is? Read on. The first letter of every sentence is a capital because the text follows a period, an exclamation mark or a question mark. Notice the catch: "SEO" became "seo", because the style lowercases everything before it adds capitals. You would retype it as "SEO" yourself.

Click Capitalized Case on the same draft and you get: My First Post. It Covers Seo Basics! Do You Know What A Title Tag Is? Read On. That works for a short heading but looks wrong for a full sentence, which shows why picking the right style matters more than the click itself.

How Do You Read and Fix the Results?

Each style makes a predictable change, so the fix for a surprising result is usually a small manual edit. Here is what to expect from each one.

Sentence case

The tool lowercases all text, then capitalizes the first non-space character at the start of the text and after every period, exclamation mark, question mark or line break. A good result reads like normal prose. Check three things afterward: the word "I", proper nouns (names, cities, brands) and acronyms such as SEO or USA, because all of them come back lowercase.

lower case and UPPER CASE

These are the simplest styles: every letter becomes small or capital. Lower case is useful for normalizing data, tags and email addresses. Upper case suits short labels, warnings and legal headings. Long paragraphs in all capitals are harder to read, so use it sparingly.

Capitalized Case

Every word gets a capital first letter and lowercase for the rest. Good results appear on headings, product names and names of people. Poor results appear when a word begins with a symbol, such as "(draft)", which stays lowercase because the bracket counts as the first character. Words like iPhone or eBay also become "Iphone" and "Ebay", so correct them by hand.

Alternating and inverse case

Alternating case starts with a lowercase letter and then flips with each letter, ignoring spaces, numbers and punctuation. Inverse case swaps every letter individually. Both are mainly for playful captions, memes and usernames, and neither is meant for professional writing. Inverse case is also a quick way to repair a paragraph typed with Caps Lock on by mistake, as long as the text was fully reversed.

When Is a Text Case Converter the Right Choice?

A case converter is the right choice any time the capitalization is wrong and retyping would be slow or error-prone. These are the most common situations.

• Headlines and page titles: Turn a draft title into Capitalized Case, then lowercase small words such as "a", "of" and "to" if your style guide asks for it.
• Text pasted from other apps: Documents, PDFs and emails often arrive in all capitals. Sentence case turns them into readable paragraphs in one click.
• Spreadsheet cleanup: If you only need a few cells fixed, paste them here instead of writing a formula. Excel and Google Sheets have UPPER, LOWER and PROPER functions for whole columns, and Word cycles through cases with Shift+F3 on selected text.
• Consistent labels: Product names, categories, keywords and tags look more professional when they all follow one pattern, and lowercase is a safe default for data you will compare or match later.
• Social posts and fun text: Alternating case and inverse case give captions a distinctive, sarcastic or playful look.
• URLs and slugs: Paths in web addresses are treated as case-sensitive, according to Google's Search Central guidance on URL structure, so lowercasing slugs before publishing helps you avoid accidental duplicate addresses.

Best Practices and Troubleshooting Tips

A few habits prevent most surprises when you change text case. Most of them come down to working on a copy and proofreading the result.

• Keep the original. The converted text overwrites the box, and there is no undo button. Paste your source into a separate document first, or use a text comparison tool afterward to see exactly what changed.
• Fix acronyms in one pass. After Sentence case or Capitalized Case, an acronym like "Seo" is easy to correct with a find and replace tool that has a case-sensitive option, so you can change every instance at once.
• Watch domain names and abbreviations. Sentence case treats every period as the end of a sentence. A string like example.com becomes "example.Com", and "e.g. this" becomes "E.G. This". Retype those spots.
• Check opening quotes. If a sentence starts with a quotation mark or bracket, that symbol uses up the capital, so the first letter stays small. Capitalize it manually.
• Use line breaks on purpose. Sentence case also capitalizes the first letter on every new line. That is helpful for lists and poems, but if a sentence is broken across two lines, the second line will start with a capital.
• Try styles in order. If you want clean prose from messy text, click lower case first, then Sentence case. The final result is the same as clicking Sentence case alone, but it gives you a chance to see the neutral version.
• Check the counters. If the Words count looks too low or high, look for stray spaces or line breaks in the pasted text, because words are counted by whitespace.

What Are the Limits of This Case Converter?

The tool follows simple capitalization rules and does not read meaning. It cannot tell a name from a common word, so it will never keep "Paris" capitalized in Sentence case or know that "NASA" should stay in capitals. It also has no list of small words, so Capitalized Case will not follow AP, Chicago or APA headline rules for you.

It changes only the case of letters. It does not fix spelling, remove extra spaces, or convert to programming formats such as camelCase or snake_case. Hyphenated words get only their first part capitalized, so "well-known" becomes "Well-known". For the other text jobs that come after the case is right, such as sorting a list of lines with a text line sorter, or checking letter counts with a character frequency counter, you can pick from the text utility tools collection.

If you want to go beyond capitalization and try playful styles, the reverse text generator flips your words backward and works well after you have chosen your case.

Paste your text into the box above and click a style to see the result straight away. Review the proper nouns and acronyms, then copy or download the finished text and move on with your work.