About
Tools that respect your time and your data
Tools.ly is a small, independent collection of free utilities for everyday tasks — from calculating a healthy body-fat target to picking an accessible color palette. Everything is built to work in a browser tab, on any device, with nothing installed.
Our mission
Useful software should not require an account, a subscription or a download. Every tool here is free to use, needs no sign-up, and does its work on your own device. We would rather build thirty tools that each do one job properly than one bloated suite that does everything badly.
How the tools are built
The site is a static website: plain HTML, CSS and JavaScript, generated ahead of time and served from a global content network. There is no PHP, no database and no application server. The consequences are practical rather than technical:
- Your input stays on your device. Calculations happen in your browser, not on a server we control.
- Pages load quickly. A static page has nothing to compute before it renders, which matters on slow mobile connections.
- There is very little to break. No server-side sessions, no expired logins, no database to go offline.
What we deliberately do not do
- No accounts, no email walls, no "sign in to continue".
- No uploading your files, measurements or documents anywhere.
- No selling data, because there is no collected data to sell.
- No dark patterns: nothing is hidden behind a fake progress bar or a countdown.
The health tools, and what they are not
The body-composition, calorie and ideal-weight tools use published formulas (the U.S. Navy circumference method, the Mifflin–St Jeor equation and standard weight-range equations). They produce estimates for information only. They are not medical advice and cannot account for your medical history. For anything that matters, talk to a doctor, dietitian or qualified trainer.
Who publishes these tools
Every page on this site carries the same collective byline: Tools.ly Team, the Tools.ly Platform Development Team. Nothing here is credited to an individual, and no page names a person as the author of a tool, a guide or a release note. The work is presented the way it is actually done — as a shared effort — rather than attaching a human name to each page.
In practice that means you can judge a tool on what it does, what it costs you (nothing), and whether its sources hold up, instead of on who signed it. When something changes, the page's publication date is updated and the change is described on the page itself.
How the site is maintained
Every tool has its own permanent address, so a link to a tool keeps working. When a tool is updated, the change is noted on the page itself. If you spot an error — a wrong conversion, an out-of-date formula, a broken layout on your device — tell us and it gets fixed.
Start somewhere
Browse the full directory, or jump straight into one of the tools people use most: