Why this tool is useful
Use normalization before comparing identifiers, deduplicating multilingual text or preparing fixtures whose visually identical strings may have different byte sequences.
Text & List Tools · runs locally
Unicode Normalization Tool
Convert text to NFC, NFD, NFKC or NFKD and report which code points changed instead of hiding compatibility transformations.
Ready. Your working data stays in this browser.
How it works
The browser calls the standard Unicode normalize operation, compares source and result code-point sequences and reports whether compatibility characters were changed.
Practical example
NFC turns e plus a combining acute accent into one composed é code point, while NFKC also expands compatibility forms such as the fi ligature.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.