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Inverse Case Converter

Swap the case of every letter (upper ↔ lower).

Results

Result

📊 Inverse Case Converter chart

Character composition of the result: letters, digits, spaces, punctuation and other symbols.

What is the Inverse Case Converter?

Swap the case of every letter (upper ↔ lower). Inverse case flips every letter’s case, which quickly fixes text typed with Caps Lock accidentally turned on.

Inverse Case Converter – free online text tool illustration
Inverse Case Converter — free, exact and private.

How to use the Inverse Case Converter

  1. Paste or type your your text into the box (a sample is pre-filled so you can see how it works).
  2. Results update automatically as you type; you can also press Calculate.
  3. Read the output: result.
  4. Use the 📊 chart to see the result visually, then copy or share it.

Where the Inverse Case Converter helps in real life

You typed a paragraph with Caps Lock on, so it reads “hELLO tHERE.” Inverting the case fixes it instantly.

A designer wants an unusual text effect for a graphic and flips the case of a phrase.

Common mistakes to avoid

  • Using it when sentence case is what you need.
  • Applying it to names and acronyms that should stay uppercase.
  • Expecting it to fix punctuation or spacing.
  • Using it in formal documents for decoration.

💡 Practical tip: If you typed a whole message with Caps Lock on, inverse case fixes it in one click.

Illustration: a writer’s desk with notes, a pen and a laptop
Inverse Case Converter in everyday work — illustration.

Tips for better results

  • Check proper nouns after converting.
  • Use sentence case for normal writing.
  • Use it mainly to fix Caps Lock mistakes.

Frequently asked questions

What does the Inverse Case Converter do?

Swap the case of every letter (upper ↔ lower).

Is the Inverse Case Converter accurate?

Yes. It uses standard formulas and exact constants, and the results are verified by our automated test suite. Values are displayed to up to 12 significant digits.

Is this tool free and private?

Yes — the Inverse Case Converter is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.

Related tools

Reverse Text GeneratorReverse text character by character (emoji-safe).Reverse Word OrderReverse the order of words on each line.Upside Down Text GeneratorFlip text upside down using Unicode characters.Remove Duplicate LinesDelete repeated lines from a list while keeping the original order.Sort Lines AlphabeticallySort lines A→Z, Z→A, by length or numerically.Shuffle Lines (List Randomizer)Randomly shuffle the lines of a list — great for draws and picking order.Remove Empty LinesDelete blank and whitespace-only lines from text.Remove Extra SpacesCollapse multiple spaces and trim each line.

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