As developers, we use online tools all the time — JSON formatters, CSS generators, minifiers, validators… But honestly, most of them feel like this: painfully slow After a while, it just gets frustrating. So instead of complaining, I decided to build my own. I didn’t want to create just another tool website. I focused on three simple things: Speed – everything should feel instant I started with a
Vendredi matin, 9 h 15. Françoise est dans son cockpit — trois écrans, à gauche l'Excel-pointeuse qu'elle tient à jour depuis quinze ans, à droite Sage, et au milieu Rembrandt depuis trois semaines. Sa tasse à la main, celle avec sa tête imprimée dessus que quelqu'un lui a offerte à Noël. Elle pivote sur sa chaise et me lance depuis son bureau : « Michel, combien on a d'inscrits pour la rentrée, d
« Hold on, we need to talk, this doesn't add up » Friday morning, 9:15 AM. Françoise is in her cockpit — three screens: on the left the Excel attendance sheet she's kept up to date for fifteen years, on the right Sage, and in the middle Rembrandt for three weeks now. Cup in hand, the one with her face printed on it that someone gave her at Christmas. She swivels in her chair and calls over from
Hey devs, After spending a lot of time writing TypeScript code (and sometimes feeling more confident than I probably should), I decided to create something to help myself and others properly measure their TypeScript knowledge. So I built TS Quiz — a free interactive quiz platform focused on modern TypeScript and React + TypeScript. 125 hand-crafted questions 5 difficulty levels (Basic → Advanced)
Building a Translation Pipeline for International Contract Bidding If your company bids on international contracts, you've probably dealt with the translation bottleneck. Technical proposals need precise translation, certified documents have strict formatting requirements, and procurement deadlines don't wait for anyone. After seeing how UK public procurement translation requirements can make or
Practical post for engineers who've hit the wall where an AI proof-of-concept works on clean data but can't connect to the legacy systems that hold actual production data. Disclosure: I work at Ailoitte, which builds AI integration layers connecting legacy infrastructure to production AI. Sharing what the engineering actually looks like. AI models expect structured, consistently formatted data. Le
Originally published on oseifert.ch TL;DR: Quizlet locked the learn mode and Knowt's import extension keeps missing cards. So i built quick-cards, a Chrome extension that grabs your Quizlet set and exports it to whatever you want (txt, csv, json, pdf, printable flashcards, Anki decks, or directly to Knowt). Chrome only for now, install instructions at quickcards.oseifert.ch/install. If you are a s
Why I'm building OneSlate Calendly is great if you're a freelancer with one calendar. It breaks if you're an executive with shared calendars from your The result: my Calendly booking page often shows zero available OneSlate solves this with a simple but specific filter: only calendar_kind is primary or owned count That single insight is the core differentiator. Everything else Solo founder,