tr39

The world's first font-by-font confusables dataset: which Unicode characters look alike, measured from the outlines of 322 fonts at the size people read them. CC BY, used in Mozilla's add-on name checks.

Is this name really free? Checks usernames and slugs across your tables and reserved names, and against lookalikes of names you protect, using the world's first font-by-font confusables dataset. Zero dependencies.

Canonicalize and neutralize adversarial Unicode — homoglyph/bidi/zalgo/invisibles — before it reaches your classifiers, indexes, and identifiers

secure identifier for usernames