About raatools/

What this site is

raatools/ is a collection of single-purpose tools — a resistor colour code decoder, a moon phase calculator, a PDF merger, a chemical equation balancer, a subnet calculator, and more than 120 others. Each one does one job, loads quickly and needs nothing from you: no account, no email address, no free trial that turns into a subscription.

The tools are grouped into 24 categories, from electronics and physics to cooking and SDR radio. You can browse them all from the tools index, and the articles section has longer guides on the subjects behind them.

Why it exists

Most of these calculations already exist online, and many of the sites hosting them are hard to use: a wall of consent prompts, paragraphs of filler, and an answer with no explanation of where it came from.

raatools/ started as the set of calculators we kept needing for electronics, homelab and science projects. The goal is narrow: open the page, get the number, understand why it is that number. Tool pages explain the formula or method behind the result and show a worked example, so you can check the answer instead of having to trust it.

Who makes it

raatools/ is made and run by Raadig AS, a registered Norwegian company (organisation number NO 833 209 132). Company details are at raadig.no. Its sister site raacon.no has tools for runners and other endurance athletes.

Where a tool relies on reference data — orbital elements, codon tables, the IEEE and Bluetooth SIG manufacturer registries — the page says where the data comes from. If you find a tool that returns a wrong answer, please tell us: it is the most useful message you can send, and it goes straight to the top of the list. Get in touch here.

How the tools work

Almost everything on raatools/ runs as JavaScript in your own browser. When you merge two PDFs or compress an image here, the file never travels anywhere — it is read by your browser, processed on your device and handed back to you. Nothing is uploaded, nothing is stored on a server, and nothing is kept after you close the tab.

That is how the site is built, not just a promise: there is no server-side file handling to trust. You can check it by opening your browser's network tab while you use any of the file tools.

A few tools cannot work this way. A WHOIS lookup, a DNS query, an SSL certificate check or a currency conversion has to ask something on the internet. Those tools send the minimum required — the domain you typed, or just the request itself — and the privacy policy names each of them.

How the site is funded

raatools/ carries advertising. That is the whole business model: the tools stay free and account-free, and the ads pay for the servers and the time.

No tool is degraded, rate-limited or held back behind a "pro" tier to make advertising more attractive. There is no premium version of raatools/ and no plan for one. Ads and cookies are described in full in the privacy policy.

How it's built

The site is a SvelteKit application, prerendered to static HTML and served from our own server in Norway. The tools are available in English, Norwegian, French, German, Spanish, Finnish and Ukrainian; the articles are in English. There is no tracking beyond aggregate, cookie-free analytics, and no third-party JavaScript apart from Google's ad and consent scripts.

Accessibility is a stated target rather than a finished job — raatools/ aims at WCAG 2.2 Level AA, and the current state, including the parts that fall short, is documented in the accessibility statement.

What's next

The focus is depth rather than count: better explanations and data on the tools that already exist, and new guides in the articles section. New tools are added when we need one and it doesn't exist yet, which is how most of the existing ones came about.

Contact

Bug reports, corrections, tool suggestions and anything else: mail@raadig.no, or see the contact page. Company information: raadig.no.