Introducing fashion command-line tool

Sat, 21 Mar 2026 00:00:00 +0000

fashion is a Swift command-line interface to traverse a file hierarchy and compute or match popular hash digests. The project is hosted on GitHub and natively supports:

CryptoKit hash functions: SHA-2 (SHA256 by default), insecure SHA-1 and MD5
fuzzy hash functions: ssdeep and TLSH as submodules with Swift C bridging
searching for multiple digests with any algo and a similarity / distance score for fuzzy hash
git-hash-object
symhash with any algo, separator and optional sort (Mach-O binaries)
XAR archives (macOS packages) table of contents checksum with any algo and optional decompress (zlib)
CDHash (signed Mach-O binaries)
multithreading

With optimizations, fashion is very fast yet has a minimal real memory footprint < 150MB:

Command-Line Interface on Melomac

Introducing fashion command-line tool