Inverse Case Converter
This inverse case converter flips every letter in your text: uppercase characters become lowercase and lowercase become uppercase, so a sentence typed with Caps Lock on can be repaired instantly. Numbers, spaces, punctuation, and emoji are left untouched, and accented letters swap correctly. It is useful when a password, code, or paragraph was typed with the wrong shift state, or when you want to emphasize text with contrasting case. Character, word, and line counters update live while you edit. The conversion runs completely in JavaScript on your device, so nothing is uploaded or stored. Copy the corrected text with one click, or invert it again to get back the original.
Converted Text
Overview
This inverse case converter flips every letter in your text: uppercase characters become lowercase and lowercase become uppercase, so a sentence typed with Caps Lock on can be repaired instantly. Numbers, spaces, punctuation, and emoji are left untouched, and accented letters swap correctly. It is useful when a password, code, or paragraph was typed with the wrong shift state, or when you want to emphasize text with contrasting case. Character, word, and line counters update live while you edit. The conversion runs completely in JavaScript on your device, so nothing is uploaded or stored. Copy the corrected text with one click, or invert it again to get back the original.Formula
Inverse case: a→A, A→a for every characterFrequently asked questions
What is the difference between inverse and toggle case? +
Toggle usually alternates case letter by letter; inverse simply flips the existing case of every character, so mistakes are repaired and correct letters change.
Will it fix text typed with Caps Lock? +
Yes. If a whole sentence was typed in uppercase by accident, inverse case converts it to lowercase in one step.
Does it affect numbers or symbols? +
No. Only letters are swapped; digits, punctuation, spaces, and emoji remain unchanged.
What text case conversions are available? +
This tool supports UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, and more.
Can I convert text with special characters and accents? +
Yes. The tool preserves accented characters, special symbols, and non-Latin scripts during all case conversions.
Can I convert large amounts of text at once? +
There is no character limit. Paste any amount of text and the tool converts it instantly in your browser.
Does it handle programming naming conventions? +
Yes. The tool supports camelCase, PascalCase, snake_case, kebab-case, and SCREAMING_SNAKE_CASE for programming variable names.