Blog Notes

Notes on craft.

Engineering deep-dives, design decisions, and the occasional announcement. No growth-hacking — just the work.

Why we built ToolBox Image to run entirely in your browser

A walkthrough of the architecture behind a privacy-first image toolkit — and why the browser turned out to be the right place for it.

JPEG, WebP, AVIF — what they do, what they trade off, and how to pick the right encoder for the job.

Notes from the design process — how we made a tool that feels fast and respectful of your files.

The Compressor is live. Here is what we are building next and why.

JPEG, PNG, WebP, AVIF — which one should you use? A practical guide to picking the best format for every image on your site.

Stop compressing images one by one. Here is how batch processing with parallel workers can save you hours of manual work.