Audited & minimal JS implementation of Salsa20, ChaCha and AES

A format-preserving encryption implementation in Go

Format-Preserving Encryption Implementation in Java

Format-preserving encryption in Rust

Format Preserving Encryption in Go

NIST FF1 CLI tool. Uses input files consisting of one (large) hex line.

Python implementation of format preserving encryption defined as a NIST draft (FF1, FF3-1)