About Absurd Tools
Absurd Tools is a free collection of 1002 small, focused online tools — calculators, converters, formatters, generators and games — spread across 62 categories. Each one is built to do a single job well and load instantly, without an account, an upsell, or a tour of the features.
The site is coded in Austin, Texas by Sumupid Productions LLC — an everyday one-person company that decided to build hundreds of online tools. It started because the existing options for small calculations were mostly the same: a thin page wrapped in pop-ups, an interstitial before the answer, and a result you could not check. The goal here is the opposite — get to the answer immediately, then explain how it was reached so you can tell whether to trust it.
No sign-ups, no tracking, no nonsense. The larger programs built here — the ones that could not fit in a browser tab — are in Custom Applications, and another project worth a look is guitarjumps.com.
Private by design
Every tool on this site runs entirely in your browser. When you paste text, enter numbers, or open a file, that data never leaves your device — there is no server doing the work, and nothing is logged or stored. This is a structural property of how the site is built rather than a promise about how data is handled after collection: the data is not collected in the first place.
That makes these tools safe to use with material you would not paste into an unknown web service — a contract, a spreadsheet extract, a password you are about to set, an image with location data in it. It also means the tools keep working with the network disconnected, and that nothing you do here can leak from a server that was never involved.
There are two deliberate exceptions, both obvious in use. The games with global high-score boards send a name and score when you choose to submit one, because a shared leaderboard cannot work otherwise. And a handful of tools that look up live data — exchange rates, for instance — have to ask a third party for it. Where that happens, the page says so. The privacy policy covers the detail.
How the answers are checked
A calculator that is confidently wrong is worse than no calculator, so correctness gets more attention here than anything else. Every tool with a numerical result is covered by automated tests that run before any change reaches the site. Where it is possible, results are verified by a second, independent method rather than by re-running the same formula — an integral is differentiated back, a root is substituted into the original equation, a conversion is run in reverse. Several genuine bugs have been caught this way that a straightforward test would have passed straight over.
That is a real standard, not a guarantee. Numerical software has edge cases, and unit conventions differ between countries and industries in ways one page cannot always capture. Nothing here should be treated as professional advice — see the terms of use for where the limits sit. If you find a wrong answer, the contact page explains what to include; those reports get fixed quickly and are genuinely welcome.
Fast and free
There are no accounts, no paywalls, no downloads and no feature held back for a paid tier. The site is built as static pages, so it loads quickly on a slow connection and an old phone as well as it does on a desktop. Tools are added regularly, and existing ones are revised when something turns out to be unclear or incomplete.
How it is funded
Absurd Tools is kept free through advertising, which covers hosting and the domain. Ads are kept out of the way of the tool itself: nothing blocks the result, nothing appears before you can use the page, and no tool is gated behind an ad. Sponsored posts, paid links and paid reviews are declined, so nothing on the site has been written because somebody paid for it. See the privacy policy for details on cookies and third-party advertising.
Suggestions
Missing something you would find useful? Suggestions have produced a fair number of the tools here. The contact page has a form, and the suggestions that get built soonest tend to describe a specific job you actually needed done rather than a general category.