Case Converter
Switch any block of text between UPPERCASE, lowercase, Title Case and Sentence case with one click.
This tool reformats the capitalisation of any text without changing the words themselves. It's handy for fixing text pasted from a source with the wrong case, formatting headlines, or preparing titles for a CMS. Each button applies its rule instantly to the full text box, so you can keep switching formats until you get the one you need.
Why pasted text so often has the wrong case
Text copied from PDFs, old databases, spreadsheets, or CapsLock-heavy emails frequently arrives in the wrong case — ALL CAPS from a legacy system, or lowercase from a form field that stripped formatting. Retyping it by hand is slow and error-prone; running it through a case converter fixes the whole block in one click instead of manually correcting each word.
Title Case is trickier than it looks
True title case, as used in book and article titles, actually keeps small words like 'a', 'of', and 'the' lowercase unless they start the title — this tool uses the simpler, more common convention of capitalising every word, which covers most everyday needs like headlines and product names, though a style guide like APA or Chicago may want the more nuanced version for formal publishing.
When case conversion isn't enough on its own
Case conversion fixes capitalisation, but it won't fix other formatting problems in pasted text, like extra spaces, stray line breaks, or repeated punctuation. If text still looks messy after converting the case, pairing this tool with the Text Reverser & Cleaner tool's whitespace-stripping option usually finishes the job, since the two tools solve different parts of the same 'text arrived looking wrong' problem.
Why some names and abbreviations resist automatic case rules entirely
Certain brand names and words are stylised deliberately outside normal capitalisation rules — 'iPhone', 'eBay', and 'McDonald's are common examples where a plain UPPERCASE, lowercase, or Title Case pass will produce a technically 'wrong' looking result compared to the brand's actual preferred styling. No automatic case converter can reliably guess these exceptions, since they're a matter of specific brand convention rather than a general grammar rule, so a final manual pass over any text containing stylised names is worth doing after bulk conversion.
How to use it
- Paste your text into the input box.
- Click UPPERCASE, lowercase, Title Case, or Sentence case.
- The result appears instantly, replacing the box content.
- Click Copy to copy the converted text to your clipboard.
Common ways people use this tool
Fixing text pasted in ALL CAPS
Convert an email or document that arrived entirely in caps back into normal sentence case for readability.
Formatting headlines and titles
Turn a plain sentence into Title Case for a blog post heading or slide title.
Cleaning up form submissions
Standardise names or addresses submitted in inconsistent case before adding them to a spreadsheet or CRM.
Tips for getting the best results
- Run Sentence case first if your source text has no punctuation structure, then manually fix any names that got lowercased.
- Title Case will capitalise every word including small ones like 'the' and 'of' — manually lowercase those afterward if you need strict editorial style.
- Converting ALL CAPS to lowercase won't restore proper nouns' capitalisation automatically — a quick manual pass is still worth it for names.
- Use Copy right after converting so you don't accidentally edit the box and lose the result.
Frequently asked questions
What's the difference between Title Case and Sentence case?
Title Case capitalises the first letter of most words (like a headline), while Sentence case only capitalises the first letter of each sentence, like normal prose.
Will it fix acronyms like NASA or USA?
Title Case and lowercase conversions treat every letter the same way, so acronyms will be reformatted along with the rest of the text — you may need to fix those manually afterward.
Does it work on very long text?
Yes, there's no practical limit since conversion happens instantly in your browser rather than being sent to a server.
Can I undo a conversion?
There's no undo button, but you can simply re-paste your original text and try a different case option.
Does Sentence case handle bullet points or lists correctly?
It capitalises the first letter after each sentence-ending punctuation mark, so bullet points without periods may not each get capitalised individually.
Will converting case affect numbers or symbols?
No, numbers, punctuation and symbols are left exactly as they are — only letters are affected.
Is this the same as what Word or Google Docs does?
The core logic is similar for UPPERCASE/lowercase, though Title Case implementations can vary slightly between tools depending on which small words they choose to skip.
Can I convert just part of a large document without affecting the rest?
This version applies the chosen case to the entire text box at once — for converting only part of a document, copy that section into the tool separately, convert it, then paste it back into place.
Why does converting to lowercase sometimes look wrong for German or other language text?
Some languages have case-related rules beyond simple upper/lowercase, like German's ß character, which this general-purpose tool doesn't specially handle — a language-specific tool may be more accurate for non-English text with unusual case rules.