A directory of ad-free, privacy-first browser tools and calculators organised by category, including finance, maths, science, engineering, audio, and utility apps.
Most “free” tools online come buried in ads, pop-ups and promo clutter. This site aims to be the opposite: a small (but growing) collection of simple, genuinely fuss-free tools, with no advertising at all.
If you’d like to help the site grow, sharing it or linking to it really helps people (and search engines) find it. There’s also a small crypto tip option via the Support / Donate link at the bottom of each page — appreciated, but never required.
Curated collections of tools for specific hobbies, professions, or technical interests.
Filament, spool, and print-weight calculators to help plan prints, estimate usage, and avoid run-outs.
View 3D printing tools →New specialist groups are added gradually as more tools are built.