Software & Computer Services
Seven macOS and Windows utilities for file cleanup, security, audio practice, guitar pedagogy, and on-site PC service — each one built, self-tested, and run daily by the person who wrote it.
Catalog // 07 Tools
Find and clear duplicate photos without guessing.
Scans a photo library, groups true duplicates, and lets you review every match before anything moves. Built after one too many manual cleanups.
Python · Tkinter · Pillow
Batch renaming you can undo.
Renames files in bulk and logs every batch to a local database, so a bad run is one click from reversed — including the file-swap edge cases that break naive renamers.
Python · Tkinter · SQLite
Folder encryption with nothing left to trust but the password.
AES-256-GCM per file, keys derived with scrypt, nothing written to Keychain — the password is asked for every time. Each file is verified byte-for-byte before the original is removed.
Python · cryptography · py2app
Keyword-scans live websites, at scale.
Sweeps HTTP sites for keyword matches with optional routing over Tor for anonymized scanning. A native app, not a script someone has to babysit.
Swift · SwiftUI
Slow a song down without losing the pitch.
A practice tool for musicians: pitch-locked speed control, EQ presets, a DAW-style zoom waveform, and a per-song loop library, built around a time-stretching engine tuned to avoid the underwater warble most slow-down tools produce.
Python · NumPy · sounddevice
Guitar, taught by shape before theory.
A modular teaching app built around pattern-first pedagogy — shapes light up on the fretboard before they're named, with theory kept one panel away for when it's actually wanted.
Python · Tkinter
AI-assisted machine triage, for technicians.
A chat-driven service tool for cleaning up and diagnosing a machine on-site — propose, approve, and log every action, with one-click undo. Built for the bench, not the end customer.
Python · Claude API
About
401comp is a one-person shop. It started with a two-year Computer Information Systems degree from New England Institute of Technology, then a stint teaching the same subject there. From there came programmer/analyst work on healthcare systems — MUMPS, if that means anything to you — and later a small business fixing other people's Windows machines. The software here comes from the same instinct: find the actual problem, fix it properly, and make sure it's still fixed tomorrow.