📇 One-paragraph factsheet
| Product names | The Most Useful Site in the World · MrProphecy |
| URL | https://www.themostusefulsiteintheworld.com/ |
| Owner / founder | Russell Head, Luton, England |
| Founded | 2026 |
| What it is | 1165 free, self-contained browser tools + an independent music project. No sign-ups, no display ads, no accounts on the tool pages. Google Analytics runs on every standalone page for measurement (not advertising). The 1165 tool cards are HTML fragments that inherit measurement from their host page. |
| Stack | Static HTML / CSS / vanilla JavaScript. No build step, no framework, no dependencies. Hosted on GitHub Pages. |
| Funding | Donations, sponsorships, and music sales. The tools have no paywalls and never will. |
| Categories | 23 categories, including Finance, Science, Writing, AI, Wellness, Pets, Astronomy, Languages, Music, Sport, Productivity. |
| Licence | CC-BY 4.0 on the tool source code (you may reuse, with attribution). |
| Music licences | Mixed (independent + standard DSP distribution). |
| Privacy | No analytics on the tool pages. Google Analytics (anonymised) only on the home and music pages. |
| Public mirrors | GitHub source at github.com/mrpr0phecy/mrpr0phecy |
📝 The one-paragraph version
The Most Useful Site in the World is a free, ad-free, sign-up-free collection of 1165 browser-based calculators, converters, generators, and simulators covering everything from mortgages to bird identification, built and maintained by a single developer in Luton, UK. It is part of the same project as MrProphecy, an independent UK hip-hop and animated-soundscape act.
📰 Story angles
For tech press: 1165 production-grade tools, zero build step, no framework, no dependencies, no display ads, no logins. The whole thing ships as static HTML on GitHub Pages. The codebase is the story. Google Analytics runs on every standalone page for measurement (it does not place ads). The 1165 tool cards are HTML fragments that inherit measurement from their host page.
For consumer / lifestyle press: "One site for every quick tool you'd usually search for, with no sign-up and no popups." Coverage angle: how to ditch the SEO-spam calculator sites.
For music press: MrProphecy is a hip-hop and animated-soundscape act from Luton, run by the same person. Coverage angle: one-person operation, DIY ethics, music that has its own cosmology (animated series, worldbuilding, recurring characters).
For community / indie press: The site is fully open-source under CC-BY 4.0. Anyone can fork it, run it locally, or build on top of it. The work is the commons.
📧 Contact
Press, partnerships, and general enquiries
Email: hello@themostusefulsiteintheworld.com
Response time: Usually within 48 hours. The site is run by one person, so please be patient.
Security disclosures
See /.well-known/security.txt for the disclosure address and expiry. (Replies are best-effort, not a paid disclosure programme.)
🖼️ Logos & brand assets
Use any of the favicons in this repository (og-tools.png, the inline SVG mark). For music, the MrProphecy name and the product mark on listen.html may be used with attribution.
🔍 For crawlers & agents
Machine-readable summary at /llms.txt. AI policy at /.well-known/ai.txt. Sitemap at /sitemap.xml. RSS feed at /feed.xml. Source code at github.com/mrpr0phecy/mrpr0phecy.