https://qanen.site/blog Engineering deep-dives and the thinking behind QANEN's software — how we build useful, accessible, dependable technology. en Sun, 11 Oct 2026 11:57:00 GMT https://qanen.site/blog/designing-honest-software https://qanen.site/blog/designing-honest-software Tue, 06 Oct 2026 00:00:00 GMT QANEN Engineering Philosophy A calculator that gives you a number without showing its assumptions is a black box. Our PayPal Fee Calculator shows its source and a 'last verified' date — a small design choice that says a lot about what software owes its users. design trust transparency Tools Kit https://qanen.site/blog/adaptive-concurrency-download-engine https://qanen.site/blog/adaptive-concurrency-download-engine Fri, 02 Oct 2026 00:00:00 GMT QANEN Engineering Performance Starting every download with the maximum number of parallel workers is a reliable way to get throttled. Our engine starts at four and climbs a 2 to 12 ladder based on real throughput — here is the reasoning, including the hysteresis that stops it oscillating. performance concurrency control systems YDM https://qanen.site/blog/why-we-compress-images-in-the-browser https://qanen.site/blog/why-we-compress-images-in-the-browser Mon, 28 Sep 2026 00:00:00 GMT QANEN Engineering Architecture Most 'free' image compressors quietly upload your photos to a server. We built OptiSqueeze so not a single byte leaves your device — here is how WebAssembly makes that possible, and why it matters. privacy WebAssembly images OptiSqueeze https://qanen.site/blog/how-resumable-downloads-work https://qanen.site/blog/how-resumable-downloads-work Fri, 18 Sep 2026 00:00:00 GMT QANEN Engineering Engineering A download that dies at 90% and starts from zero wastes your time and bandwidth. Here is the HTTP Range machinery, session persistence and disk-safety logic that let a downloader resume exactly where it stopped. downloads HTTP reliability YDM https://qanen.site/blog/clipboard-detection-without-the-creepiness https://qanen.site/blog/clipboard-detection-without-the-creepiness Sat, 12 Sep 2026 00:00:00 GMT QANEN Engineering Engineering An app that watches your clipboard can be genuinely helpful or quietly invasive. The difference is consent, transparency and an easy off switch. Here is how we add 'copy a link and go' without becoming spyware. clipboard UX privacy YDM https://qanen.site/blog/what-works-offline-actually-requires https://qanen.site/blog/what-works-offline-actually-requires Tue, 08 Sep 2026 00:00:00 GMT QANEN Engineering Architecture 'Works offline' sounds like a checkbox but it is an architecture decision. Here is what has to be true for a web tool to keep working when the network does not — moving the compute to the client, caching what you need before you need it, and a service worker as the switchboard. offline service workers caching OptiSqueeze https://qanen.site/blog/stream-copy-not-re-encode https://qanen.site/blog/stream-copy-not-re-encode Sun, 30 Aug 2026 00:00:00 GMT QANEN Engineering Engineering Every time a tool re-encodes a video it throws away detail forever. When we merge a separate video and audio stream we use stream copy instead — here is what that means for quality, speed and your CPU. video codecs ffmpeg YDM