Digital Toolchest

Text Case Inverter

Flip the case of every letter in your text. Fix accidental caps lock mistakes instantly.

Text to invert

Paste text to swap uppercase and lowercase characters.

Processing happens locally in your browser; nothing is uploaded.

Inverted case outputEach letter swapped to the opposite case.

0 lines in0 lines outN/A runtime

Typical inputs process in under 1ms on modern browsers.

How to invert case

Invert in 3 steps

Takes ~5 seconds
  1. 1
    Paste text

    Add your text in the input box.

  2. 2
    Invert case

    Click "Invert case" to swap letter casing.

  3. 3
    Copy output

    Copy the inverted result for reuse.

Case inversion is handy for fixing accidental caps lock typing.

Who should use this tool?

  • Writers fixing formatting
  • Developers cleaning text
  • Support teams editing replies

Examples

Inverts every letter case.

"Hello World" -> hELLO wORLD

Works on mixed casing.

"caps LOCK" -> CAPS lock

Keeps numbers and symbols unchanged.

"Order #123" -> oRDER #123

Invert casing without manual edits

Swap uppercase and lowercase letters instantly.

Use this text case inverter to swap uppercase and lowercase letters in any text. Paste your content, invert the case instantly, and copy the result. Everything runs locally in your browser for fast, private formatting.

Fix caps lock

Quickly repair text typed with the wrong casing.

  • Instant output
  • No server upload
  • Works on any text
Bulk ready

Invert case across long documents or lists.

  • Bulk paste
  • Line-by-line output
  • Copy or download easily
Privacy first: we never send your input to a server. Everything runs locally in your browser.

Case inversion tips

Review results for names or acronyms after swapping case.

  • Use inversion to fix accidental caps lock.
  • Double-check proper nouns after conversion.
  • Pair with uppercase or lowercase tools if needed.

Frequently asked questions

Does this change numbers?>
No. Numbers and symbols stay the same.
Does it keep spacing?>
Yes. Only letter casing changes.
Is my data sent anywhere?>
No. All processing happens locally in your browser.

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