Free Text Case Converter Online

Convert text to uppercase, lowercase, title case, or sentence case. Free online case converter. Works entirely in your browser with no sign-up required.

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Read the guide: How to Change Text Case (Uppercase, Lowercase, Title Case)

Select Case

Original Text

Converted Text
UPPERCASE

Tips

Programming cases auto-detect word boundaries from camelCase, snake_case, etc.
Smart Title Case follows AP/APA style, keeping articles and short prepositions lowercase.
Use alternating or spongebob case for stylized meme text.
CONSTANT_CASE is commonly used for environment variables.
Custom Rules let you force specific words like "API" or "URL" to stay capitalized.
Use Find & Replace to change the case of only specific words in your text.

Frequently Asked Questions

What is the Text Case Changer?

The Text Case Changer is a free online tool that converts text between uppercase, lowercase, title case, and sentence case instantly in your browser.

Is the Text Case Changer free?

Yes, it is completely free with no registration required. All conversions happen client-side in your browser.

Can I convert large amounts of text?

Yes, the Text Case Changer handles text of any length with instant results, all processed locally in your browser.

Does the Text Case Changer support title case?

Yes, the Text Case Changer supports title case which capitalizes the first letter of each word, following standard capitalization rules.

Is my data safe with this tool?

Absolutely. The Text Case Converter processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Does the Text Case Converter work on mobile devices?

Yes, the Text Case Converter is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

Do I need to create an account to use this tool?

No account or registration is needed. Simply open the Text Case Converter in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

How do I use the Text Case Converter?

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

Which browsers are supported?

The Text Case Converter works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

What is title case and how is it different from sentence case?

Title case capitalizes the first letter of every major word in a phrase — "The Quick Brown Fox" — and is the standard for headlines, book titles, and headings. Sentence case capitalizes only the first word and any proper nouns, like a normal sentence: "The quick brown fox." The practical difference is convention and emphasis: title case signals a title and is used by style guides like AP and Chicago, while sentence case feels more natural in body text, UI labels, and many modern brand styles. This tool converts between both instantly — paste your text, choose title case or sentence case, and copy the result without capitalizing word by word.

Does title case capitalize small words like 'a', 'the', and 'of'?

In most title-case styles, short words — articles (a, an, the), coordinating conjunctions (and, but, or), and short prepositions (of, in, on, to) — stay lowercase unless they are the first or last word of the title. So "The Lord of the Rings" capitalizes "The" and "Rings" but not the middle "of" or "the." Style guides differ on the cutoff: Chicago lowercases prepositions of any length, while AP capitalizes those of four letters or more. The title-case option here follows the common convention of lowercasing minor words while always capitalizing the first word, giving you clean, headline-ready text. Paste your title above to apply the rules automatically.

How do I change text to all uppercase or lowercase without retyping?

Paste or type your text into the tool and choose UPPERCASE to capitalize every letter, or lowercase to make every letter small — the conversion is instant and works on text of any length. This is far faster and less error-prone than holding Shift or retyping, especially for long passages, and it preserves spacing, numbers, and punctuation while changing only letter case. Common uses include fixing text after an accidental Caps Lock, normalizing data before importing it into a spreadsheet, and meeting style requirements for headings or form fields. Because everything runs in your browser, even large blocks of text convert immediately with no upload, and you can copy the result with one click.

What is sentence case and how do I apply it to a whole paragraph?

Sentence case formats text the way you would write a normal sentence: the first letter is capitalized, the rest are lowercase, and proper nouns keep their capitals. It is the cleanest choice for body copy, descriptions, and microcopy that should read naturally rather than shout. Applying it by hand to a paragraph that is in ALL CAPS or RaNdOm case is tedious, but this tool does it in one step — paste the text, select Sentence case, and it lowercases everything before capitalizing the start of each sentence. Note that automatic conversion cannot reliably detect every proper noun, so quickly scan names and acronyms afterward, then copy the corrected text straight to your clipboard.

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About the Text Case Converter

The Text Case Converter rewrites any block of text into a different capitalization style without retyping it. Paste a sentence, a paragraph, or a whole document, pick a case, and the converted version appears instantly beside it — ready to copy or download. It's built for writers fixing a headline that was typed in all caps, developers turning a label into a variable name, and anyone who has ever pasted text from a PDF and found it shouting in uppercase.

Everything runs locally in your browser. Your text is never uploaded to a server, so drafts, code snippets, and private notes stay on your device. There's no sign-up, no length cap, and nothing to install — every conversion happens client-side the moment you pick a style.

The case styles it produces

The converter offers nineteen styles split into two families. The everyday writing styles include:

  • UPPERCASE and lowercase — flip text entirely one way or the other.
  • Title Case and Smart Title (AP) — capitalize the principal words; the AP option follows Associated Press style by leaving short articles, conjunctions, and prepositions (a, an, the, and, or, of, to) lowercase unless they start the line.
  • Sentence case — capitalizes the first letter after each ., !, or ?, which is exactly what you need after a paste lands as one long uppercase run.
  • Capitalize Words, plus playful styles like tOGGLE cASE, aLtErNaTiNg, Inverse, SpOnGeBoB, and RaNdOm for memes and emphasis.

The programming styles convert a phrase into the identifier conventions used in code:

  • camelCase (helloWorld) and PascalCase (HelloWorld)
  • snake_case (hello_world) and CONSTANT_CASE (HELLO_WORLD)
  • kebab-case (hello-world), used widely in URLs and CSS classes
  • dot.case, path/case, and Header-Case for config keys, file paths, and HTTP-style headers

Why capitalization style matters

Case is not just cosmetic. Most style guides treat capitalization as a correctness rule: AP and Chicago both prescribe how a headline should be capitalized, and getting it wrong reads as careless. In code, naming conventions are effectively mandatory — many languages and linters expect constants in CONSTANT_CASE, classes in PascalCase, and variables in camelCase. URLs and slugs conventionally use lowercase kebab-case because some servers treat /About and /about as different paths. Converting by hand invites typos across a long list, so doing it in one pass keeps things consistent.

Tools beyond a single conversion

The converter is more than a set of one-click buttons. Alongside the main field it shows live statistics for your text — characters with and without spaces, words, sentences, lines, and how many letters are currently upper- versus lowercase — so you can see the effect of a change at a glance. Other built-in modes handle messier jobs:

  • Find & Replace applies a chosen case only to matching phrases, leaving the rest of the text untouched.
  • Batch processing splits input on a delimiter (a new line, comma, or anything you define) and converts each item separately — useful for a column of names or a list of slugs.
  • Custom rules let you force specific words to a preferred spelling, handy for brand names or acronyms that standard title case would mangle.
  • Undo and redo step back through your conversions, and you can upload a .txt or .md file or download the result as TXT or JSON.

Working accurately

A few things are worth knowing. Sentence case relies on punctuation, so text with no periods is treated as one sentence and only the first letter changes. The programming styles strip spaces and punctuation down to words before rejoining them, so stray symbols are dropped. Smart title case follows AP conventions rather than APA or Chicago, which capitalize prepositions differently — check the result against your own style guide before publishing. Paste your text above, choose a style, and the converted version is ready to copy.