utf16string is used at run time in 15 crates (of which 2 optionally). It is a direct run-time dependency in 4 crates.

Depender (with downloads and own rev deps) utf16string version
15K 10 pdfium-render ^0
380 vpin ^0.2.0
200 1 regashii ^0.2.0
icoextract ^0.2.0