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Case Converters · free · no sign-up

Uppercase Converter

Convert all text to UPPERCASE.

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Uppercase Converter

Transform all text to capital letters instantly

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The loudest form text can take: this converter turns any text into full UPPERCASE, letter by letter, instantly. Headings, warnings, labels, legal clauses and programming constants all have legitimate reasons to shout, and this tool does the shouting cleanly on any amount of text.

How to use this tool

  • Paste the text.
  • Convert to uppercase.
  • Copy the ALL-CAPS result.

Shouting, used deliberately

All-caps earned its bad reputation from overuse, since long passages in capitals read slower and feel aggressive. But used surgically (a warning line, a heading, a constant like MAX_RETRIES) it is the strongest signal plain text has, which is why contracts print their scariest clauses in it and style guides reserve it rather than ban it. The craft is in the dose; the converter handles the mechanics.

Frequently asked questions

Does it change numbers or punctuation?
No, only letters have an uppercase form; everything else passes through untouched.
Can I make just the first letter uppercase instead?
That is sentence case or Capitalize Each Word, both available in this category, better suited to prose than full caps.
Is there a limit on text length?
Paste whole documents if you like; the conversion is a simple per-letter operation and handles long text as easily as a line.