Case Converter Tool
Easily convert text cases with Convert Case!
Change upper to lower case, capitalize, and explore other text transformations effortlessly.
Paste or type your content, switch cases in one click and keep track of key text metrics.
Convert Case Online Without Retyping a Word
Text arrives in the wrong case constantly. A headline gets pasted in ALL CAPS from a design file, a product feed exports every title in lowercase, a client sends copy where every word is capitalised. Retyping it wastes time and introduces typos. This case converter rewrites the whole block in one click, keeping your punctuation, line breaks, and spacing exactly where they were.
Everything runs in your browser. Nothing you paste is uploaded, stored, or logged, so it is safe to use with unpublished copy, client drafts, and internal documents. There is no sign-up, no character cap, and no limit on how many times you can switch between formats.
What Each Case Option Does
Seven conversions cover almost every formatting job. Using the quick brown fox JUMPS over the lazy dog as the input, here is what each one returns.
| Option | What it does | Result |
|---|---|---|
| Sentence case | Capitalises the first letter after every full stop, question mark, exclamation mark, or line break. | The quick brown fox jumps over the lazy dog |
| lower case | Drops every capital letter in the text. | the quick brown fox jumps over the lazy dog |
| UPPER CASE | Raises every letter to a capital. | THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG |
| Capitalized | Capitalises the first letter of every word, with no exceptions. | The Quick Brown Fox Jumps Over The Lazy Dog |
| aLtErNaTiNg | Alternates lower and upper case across the letters, ignoring spaces and punctuation. | tHe QuIcK bRoWn FoX jUmPs OvEr ThE lAzY dOg |
| Title Case | Capitalises each word but leaves short joining words such as "the", "over", and "of" in lower case, unless they open or close the line. | The Quick Brown Fox Jumps over the Lazy Dog |
| InVeRsE | Flips the case of every letter, so capitals become lower case and vice versa. | THE QUICK BROWN FOX jumps OVER THE LAZY DOG |
How to Use the Case Converter
- Paste or type your text into the box. It can be a single headline or several thousand words.
- Click the case you want. The text is rewritten in place, so you can immediately try a different option if the first one is not right.
- Check the character, word, and sentence counts under the divider.
- Hit Copy to send the result to your clipboard, or Clear to start again.
Each conversion runs on whatever is currently in the box and rebuilds it from scratch, so you never need an intermediate step. A block pasted in ALL CAPS goes straight to Title Case or Sentence case in a single click, and you can keep switching until the result looks right.
Where a Case Converter Saves Real Time
- Headlines and meta titles. Fixing a page title that was drafted in caps, or testing whether Title Case or Sentence case suits your house style before it ships.
- Product feeds and catalogues. Supplier exports often arrive fully capitalised. Converting them to Sentence or Capitalized case makes listings readable and stops them looking like shouting in search results.
- Spreadsheet and CRM clean-up. Names, cities, and job titles pasted from mixed sources rarely share a format. One pass through Capitalized case standardises them.
- Subject lines and ad copy. Email clients and ad platforms both penalise all-caps text. Converting before you paste avoids a rejected ad or a spam filter hit.
- Transcripts and captions. Speech-to-text output is often unpunctuated lower case. Sentence case restores the opening capital on every line.
- Code comments and documentation. Normalising heading case across a docs set keeps the navigation consistent without a manual sweep.
Reading the Character, Word, and Sentence Counts
The counters update as you type and after every conversion, which makes the tool useful for length-limited writing as well as case fixing.
- Characters counts everything, including spaces and line breaks. Useful against the roughly 60-character limit for a page title or the 160-character guide for a meta description.
- Words counts groups of characters separated by whitespace, the same method most word processors use.
- Sentences counts blocks ending in a full stop, question mark, or exclamation mark. Abbreviations such as "e.g." can inflate the number slightly.
Case changes never alter the character count, so you can switch formats freely while working to a length limit.
Title Case and Sentence Case: Which to Use
Sentence case capitalises the first word and nothing else, apart from proper nouns you have already typed. It reads as more conversational and is the default for most modern publications and product interfaces.
Title Case capitalises the significant words and leaves articles, short prepositions, and conjunctions in lower case. It reads as more formal and remains standard for book titles, academic headings, and many news outlets.
Neither is better for search. What matters is that one of them is applied consistently across your site, because mismatched heading styles between templates are one of the more visible signals of an unmaintained page. Pick a convention, write it into your style guide, and use this tool to bring older pages in line.
Frequently Asked Questions
Yes. There is no account, no usage limit, and no paid tier. Convert as much text as often as you need.
No. Every conversion happens in your browser using JavaScript on this page. Your text never leaves your device, so confidential drafts and client copy are safe to paste in.
Capitalized case capitalises every word without exception. Title Case follows editorial convention and keeps short words such as "a", "the", "and", "of", "for", and "over" in lower case, unless they are the first or last word of the line.
Line breaks, paragraph spacing, punctuation, and numbers are all preserved. Only letters change. Bold, italics, and other rich formatting are not carried across, because the box holds plain text.
There is no undo button, and because each conversion is applied by script rather than typed, the browser's Ctrl+Z will not reliably restore the previous version. Keep a copy of the original if the capitals matter, since converting to lower case permanently discards them from proper nouns such as "London".
Search engines do not rank Title Case above Sentence case. Case still matters for people, though: all-caps titles are harder to scan in search results and can look like spam, which costs you clicks. Consistent, readable capitalisation is the goal.
Yes. All seven conversions handle accented Latin characters such as é, ü, and ñ, so "école de café" becomes "École De Café" in Capitalized case rather than losing the accented letter at the start of the word.
