Unicode Normalizer
Normalize text to any of the four Unicode normalization forms — NFC (canonical composition), NFD (canonical decomposition), NFKC (compatibility composition), and NFKD (compatibility decomposition). See which characters change: accented letters split into a base + combining mark (or merge back), ligatures and superscripts fold to their plain equivalents under the K forms, and look-alikes like the ohm sign Ω or ångström Å resolve to their canonical letters. Useful for comparing strings, storing keys, deduplicating, and understanding why two visually identical strings aren't equal. Everything runs locally in your browser.
Output
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Per-code-point changes
Unicode assigns some characters more than one representation: é can be the single code point U+00E9 or the pair U+0065 U+0301 (an e plus a combining acute accent). Canonical equivalence (NFC/NFD) treats these as equal and switches between composed and decomposed forms. Compatibility decomposition (NFKC/NFKD) additionally folds characters that are merely similar in appearance — the ligature fi (U+FB01) becomes fi, the superscript ² (U+00B2) becomes 2, the ohm sign Ω (U+2126) becomes the Greek capital omega Ω (U+03A9), and the ångström Å (U+212B) becomes Å (U+00C5) — even though those changes are not strictly identity. NFC is the recommended general form; NFKC is common for search and identifier matching. Code units are UTF-16 units (so a supplementary-plane character counts as 2); code points and graphemes count what you see. Everything runs locally — nothing leaves your browser.