Case Converter
Switch text between uppercase, lowercase, title, and sentence case.
Browser onlyYour data never leaves this device.
Runs entirely in your browser. Your text never leaves this device and is never stored.
Details: Privacy policy
Input
Nothing is stored.
Result
No text yet.
Type or paste text above to convert it live.
Case Converter transforms text across four fundamental orthographic casing styles in a single click: full UPPERCASE, complete lowercase, capitalized Title Case, and normalized Sentence case. Unlike Code Case Converter, which formats identifiers into programming conventions like camelCase, snake_case, and kebab-case by stripping whitespace, Case Converter preserves natural spacing and punctuation while adjusting Latin letter capitalization for prose, headings, and legal documents. Conversion follows standard Unicode default case mappings: uppercase and lowercase apply native toUpperCase and toLowerCase transformations; title case capitalizes initial letters of word tokens while handling embedded apostrophes; and sentence case capitalizes leading letters after terminal punctuation marks (. ! ? … ؟). Non-cased alphabets like Arabic and CJK scripts pass through the pipeline completely unaltered. Documented boundaries restrict operations to 200,000 characters without memory degradation, and Turkish dotted and dotless 'I' mappings follow Unicode defaults rather than localized Turkish conventions. Executing locally inside client memory without network transfers, confidential draft manuscripts and sensitive legal texts remain private on your computer.
Key facts
- Input
- Text
- Output
- Text in upper, lower, title or sentence case
- Limits
- Input text is limited to 200,000 characters per conversion pass to preserve tab responsiveness.
- Processing
- In your browser — nothing is uploaded
- Sign-up
- Not required
- Cost
- Free
Limits above are read from the same code that enforces them; formats are the ones the tool accepts and produces.
How to use Case Converter
- Paste or type your text into the converter input editor (up to 200,000 characters).
- Select your target capitalization mode: UPPERCASE, lowercase, Title Case, or Sentence case.
- Inspect the converted text updated instantly in the results area.
- Verify that internal contractions and apostrophes (like don't) maintain appropriate casing.
- Click Copy formatted text to copy your restyled copy directly to your clipboard.
- Click Clear input to reset the editor and transform a different passage.
What you get
- Converted text in UPPER, lower, Title or Sentence case, shown at once.
- A one-click copy action for the restyled result.
- Unicode-safe conversion that leaves uncased scripts unchanged.
When to use Case Converter
- Fix accidentally caps-locked paragraphs without retyping them.
- Format English headings in consistent title case.
- Normalise a pasted list so every line begins with a capital letter.
Frequently asked questions about Case Converter
Does Case Converter transmit or store my text on a server?
No. Text transformation algorithms run entirely inside your browser's local memory; your words never travel over the network or get saved to storage.
What text length limits apply to case conversion?
The converter handles text blocks up to 200,000 characters in a single run without lag, enforcing limits before string transformations begin.
How does Case Converter differ from Code Case Converter?
Code Case Converter alters word separators for programming variables (like camelCase or kebab-case), while Case Converter preserves natural spacing and punctuation for prose and headings.
Why does Arabic text remain unaffected by case conversion?
The Arabic script does not possess uppercase or lowercase letter forms; the Unicode transformation pipeline detects non-cased characters and preserves them exactly as typed.
How does Title Case treat words with internal apostrophes?
The title-casing regular expression treats words with apostrophes (such as "don't" or "it's") as unified word units, capitalizing only the leading letter.
Guides that compare Case Converter
Tools related to Case Converter
- Lorem Ipsum Generator
Generate custom Latin and Arabic placeholder text with our free lorem ipsum generator. Customize paragraphs, sentences, words, and HTML tags.
- Word Counter — count words
Count words, characters, sentences, and reading time in Arabic and English text.
- First Letter Case
Uppercase or lowercase the first letter of each line, or of the whole text.
- Add Line Numbers — prefix every line with a counter: custom start
Prefix every line with a counter: custom start, step, and separator.
- Character Counter
Count characters, UTF-8 bytes, lines, and words with Unicode precision.
- Binarize Text — show the UTF-8 bytes of text as eight-bit binary
Show the UTF-8 bytes of text as eight-bit binary groups.
⚡Embed Case Converter on Your Site & Get Badge↓
Embed this in-browser tool into any blog, documentation, or dashboard. Includes an optional dofollow backlink badge to credit Tools Hub.
<iframe src="https://salaq.com/embed/text/case-converter" title="Case Converter — Tools Hub" width="100%" height="640" style="border:0;border-radius:12px;overflow:hidden;max-width:100%;" loading="lazy"></iframe>
<p style="font-size:12px;color:#6b7280;margin-top:6px;font-family:system-ui,-apple-system,sans-serif;">Powered by <a href="https://salaq.com/tools/text/case-converter" target="_blank" rel="noopener" style="color:#2563eb;text-decoration:underline;">Case Converter on Tools Hub</a></p>Feedback
Send feedback about this tool (placeholder — feedback collection is not wired up yet).