fabianasantiago.com

FileHasher

FileHasher is a small, focused utility for verifying file integrity. It computes cryptographic hashes for files and entire folder trees, writes standard sidecar hash files alongside your files, and can re-verify everything later, so you can prove a download, an installer, or an archive hasn’t changed since you hashed it.

What it does

  • Hashes a single file or a folder of files, with optional subfolder recursion, using MD5, SHA-1, SHA-256, or SHA-512.
  • Optionally limits a folder scan to file types you choose (pkg, dmg, zip, or any comma-separated list you type).
  • Writes sidecar hash files (for example setup.exe.sha256) in three formats, including the standard sha256sum line format that command-line tools understand.
  • Verifies previously written sidecars in one pass: the algorithm is detected automatically per file, mismatches are flagged clearly, and files that are missing a sidecar are surfaced as an audit result.
  • Exports results to a clean, Excel-friendly CSV, optionally including file size and modification-date metadata.
  • Keeps a per-day log of every run, so there’s always a record of what was hashed and when.

Platforms

macOS: FileHasher for macOS is a native app for macOS 13 Ventura and later, published by me personally. It is a universal app, running natively on both Apple Silicon and Intel Macs.

Windows: The original FileHasher is a Windows app, published under my company, FSP Productions, LLC. It installs from the Microsoft Store, from winget (winget install FSPProductions.FileHasher), from Chocolatey (choco install filehasher) or from Scoop, and the two versions are kept deliberately compatible: sidecar files and CSV exports produced on one platform verify and compare cleanly on the other.

Get it for macOS

FileHasher for macOS comes in two editions, built from the same code and identical in features:

  • Mac App Store edition: free on the Mac App Store, updated automatically through the store. Makes no network connections at all.
  • Standalone edition: a notarized direct download from GitHub Releases, with auto-updates. Each release ships with a .sha256 sidecar in FileHasher’s own format, so you can verify the download with the app itself.

Source code

The Windows app is open source under the MIT license; the code lives on GitHub at github.com/fsantiago07044/filehasher.

The macOS app is now open source too, under the same MIT license; its code lives at github.com/fsantiago07044/filehasher-macos.

Privacy, in one sentence

FileHasher collects nothing, sends nothing, and works entirely on your machine; the full policy is on the FileHasher privacy page.

Support

Questions or problems? See the FileHasher support page.