INTERACTIVE TOOL
Letter case converter
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How to use this tool
- Paste the text.
- Choose uppercase, lowercase or another mode.
- Review proper names and abbreviations before copying.
Formula or method usedEach mode applies a capitalization rule without sending content outside the browser.
Worked example
Converting Hola Perú to uppercase produces HOLA PERÚ, preserving the accent.
Assumptions and limits
It does not correct spelling or implement every editorial title-case convention.
Frequently asked questions
Can I copy the result?+
Yes. Use the copy button after selecting the transformation.
What happens to my inputs?+
Calculation inputs are processed locally in your browser. Favorites and preferences may be saved on this device. The site may perform separate network requests for live panels; these do not include the values entered into this local calculator. Do not paste secrets into public tools.
How should I check the result?+
It does not correct spelling or implement every editorial title-case convention.