01The problem
Egyptian merchants get their orders as normal WhatsApp messages — typos, slang, missing info. Retyping every order into the courier’s form wastes time, and one wrong digit means a delivery goes wrong.
Web App · PWA · 2026 · LIVE
Waslfy
Paste the WhatsApp order as it is — Waslfy pulls out the name, phone, governorate, address and COD amount, then prints an A6 receipt with a barcode. Works fully offline on the merchant’s phone.
The story
The problem, how I built it, and what came out of it.
02How I built it
The engine is about 13 kB, built and tested against real Egyptian order messages, and runs entirely in the browser as a PWA — no internet needed at all. It prints an A6 receipt with a barcode, and the engine itself is published as the waslfy-parser npm package.
03The outcome
100% accuracy on the test messages, works with no internet, and the app is live — any merchant can open it from any phone. The parser is open source too, so anyone can build on it.
Want something like this for your business?
The fastest way is WhatsApp — I usually reply within hours.