Toggle Case Converter

Paste your text. The tool inverts the case of every character: uppercase becomes lowercase and vice versa. "Hello World" becomes "hELLO wORLD". Numbers, spaces, and special characters remain unchanged. Useful for fixing text typed with Caps Lock accidentally enabled.

Fixing accidental Caps Lock typing (most common use). Creating stylistic text effects for social media. Generating alternating case text (sPoNgEbOb MeMe style). Testing case-sensitivity in software. The tool provides both simple toggle and alternating case modes.

Toggle case: Inverts existing case ("Hello" → "hELLO"). Alternating case: Alternates upper/lower regardless of input ("Hello" → "hElLo" or "HeLlO"). Toggle preserves the pattern by inverting. Alternating creates a new pattern from scratch.

Yes. If you typed "hELLO wORLD" with Caps Lock on, toggle case converts it to "Hello World" (after applying toggle, then sentence/title case). The tool has a dedicated "fix Caps Lock" mode that intelligently corrects this common typing mistake.

Yes. The tool correctly toggles accented characters: É↔é, Ñ↔ñ, Ü↔ü. It handles Cyrillic (А↔а), Greek (Α↔α), and other scripts with upper/lower case distinctions. Characters without case variants (Chinese, Japanese, numbers) remain unchanged.