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Case Converter
Case Converter switches text between UPPERCASE, lowercase, Title Case and Sentence case with one click — the fast fix for a headline, a list of names, code constants or a message that arrived shouting in capital letters.
How to use Case Converter
- Paste or type the text into the editor.
- Click the case you want — the result replaces the text instantly.
- Copy the converted text into your document.
Where Case Converter is useful
- Turning an accidentally all-caps paragraph back into normal prose.
- Formatting a list of names or headings into title case.
- Preparing constants for a script or configuration file.
- Normalising inconsistent capitalisation copied from a PDF.
Formats, algorithms and limits
Title case capitalises the first letter of each whitespace-separated word and lowercases the rest. This is a mechanical rule rather than a style guide, so acronyms and proper nouns are not recognised: "NASA budget" comes back as "Nasa Budget". Sentence case keeps your punctuation and capitalises the start of the text.
Troubleshooting and honest limits
- Check acronyms and brand names after converting — spelling them back once is faster than fixing a whole document.
- Paste as plain text; copying from a word processor can bring invisible characters along with it.
- The result is shown in the output box, so the original paste is never destroyed until you replace it.
Frequently asked questions
Can I convert only part of the text?
Paste just that part, convert it and paste it back. The tool works on whatever is in the editor.
Why is 'iPhone' turned into 'Iphone' in title case?
The rule only looks at spaces and word boundaries, so brand names with internal capitals are lowercased. Fix those few by hand after converting.
Does it change punctuation or spacing?
No. Only letters are re-cased, and your punctuation, line breaks and spacing are preserved exactly.
Is there a limit on length?
Only your browser's memory. Articles and chapters convert instantly.
Related tools
Page written and reviewed by the FreeConvertio engineering team on 2026-10-14. Case Converter runs entirely in your browser — no uploads, no account and no daily limits.