Unicode Normalizer
Input
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Result
0 bytes
All processing happens in your browser — your files are never uploaded to a server.
About this Tool
AllThatConverter's Unicode normalization tool is a free online tool that converts text to NFC, NFD, NFKC, or NFKD Unicode normalization forms. It is essential for text comparison, search accuracy, database normalization, and natural language processing (NLP) preprocessing. All processing runs locally in your browser with no uploads. No registration required, completely free.
100% Secure Local Processing Active
This tool runs entirely on your device via WebAssembly and browser Canvas. No files are ever sent to any remote server, ensuring complete data security.
How to Use
Paste the text you want to normalize into the input area.
Select the target normalization form (NFC, NFD, NFKC, or NFKD).
Click 'Normalize' to run the conversion.
Copy the normalized output using the 'Copy' button.
Unicode Normalization Use Cases
Text Comparison and Search Accuracy
Normalize to NFC to eliminate mismatches between visually identical strings that use different underlying representations (e.g. precomposed vs. decomposed characters).
Database and Form Data Normalization
Normalize user input and externally sourced text to a consistent form before storing it to maintain database integrity.
NLP and Machine Learning Preprocessing
Apply Unicode normalization as a preprocessing step to standardize text variation before feeding it into NLP models or ML pipelines.
Character Encoding Bug Debugging
Use NFD decomposition to inspect the individual components of characters that look identical but fail string comparisons.
Unicode Normalization FAQ
NFC applies canonical decomposition followed by canonical composition. NFD applies canonical decomposition only. NFKC and NFKD are the compatibility variants — NFKC composes after compatibility decomposition, and NFKD only decomposes. NFC is recommended for general text; NFKC for compatibility character unification (e.g. full-width alphanumerics).
NFKC is useful for normalizing full-width alphanumerics and half-width katakana in Japanese. NFC is standard for general Japanese text storage.
NFC/NFD preserve the abstract character but change the internal representation. NFKC/NFKD may visually change characters — for example, converting full-width letters to half-width.
No. All processing runs locally in your browser. Nothing is transmitted externally.
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