A neighborhood software shop · Est. 2025
Mendelsohn Labs is a one-person studio aiming to bring the ethics and care you expect from a local small business to an industry dominated by mega corporations. We produce bespoke, small-scale projects that serve our own communities with intention and respect.
Tools that fight for working people.
39 calculators and plain-language guides — paychecks, medical bills, eviction responses, debt, and more. All client-side. No accounts, no tracking, nothing ever leaves your device.
A distraction-free reader for chord sheets.
A browser extension that cleans up Ultimate Guitar, E-Chords, Cifra Club, and more. Transpose to any key, auto-scroll hands-free, six color themes, a vertical or paged layout. Works on desktop, and on Firefox for Android.
In progress
A quiet, in-browser way to play classic board and card games with friends — chess-adjacent, card-table classics, and a few social-deduction favorites. Open a room, share a join code, sit down together. No accounts, no downloads, no hassle.
Twenty-one games wired up · online rooms under active construction
In progress
A pocket-sized closet for the clothes you already own. Catalog your wardrobe, plan outfits from what's in the drawer, and shop with intention instead of impulse — a small companion app for dressing well with less.
iOS and Android app in private testing · stylebook and smart picks under active construction
In progress
Drop in a vocal arrangement, get rehearsal audio for every voice — full mix, your part alone, your part out front, your part missing. For choirs, barbershop quartets, and a cappella groups.
Engine in development · open source
Mendelsohn Labs LLC
Seattle, Washington
Mendelsohn Labs is run by Andrew Mendelsohn, a software engineer in Seattle. It's an experiment in building software at a smaller, more human scale — projects one person can make well and stand behind.
That keeps the work focused. Free tools for people who need them, paid tools for small businesses that keep the lights on. No accounts, no tracking, no growth targets to chase — a small portfolio of useful things, looked after by the person who made them.
For now, the work is funded by donations. If something here has saved you time, money, or a headache, a tip on Ko-fi keeps the next project on the workbench moving.
Support us on Ko-fiOpen to outside work — contract, full-time, or volunteer.
Twelve years of full-stack experience — Audius, Mabl, Microsoft Azure.
Available for mission aligned work: