Plain-language, and accurate
Privacy Policy
This page explains, in plain language, what happens to the math problems you type into this tool, and what (if anything) this site collects about your visit. The short version: solving happens entirely in your browser, nothing you type is uploaded, and there is no account, no sign-up, and no tracking cookie.
What happens to what you type
Every equation or expression you type into the math solver is parsed and solved locally, inside your own browser's JavaScript engine. It is never sent to a server, never logged, and never stored anywhere outside your own device. The only place it is kept at all is your browser's own local storage, on your own device, so that the input box can restore your last problem if you come back to the page, and that value never leaves your browser.
This is a direct, verifiable consequence of how the tool is built: it is a static site with no backend database and no server-side processing of your input. There is no infrastructure on this site's end that could receive, log, or store what you type, even if someone wanted it to. The same applies to every worked example on the examples page and the reference material on the order of operations page: all of it is static content, served the same way to everyone, with no per-visitor processing at all.
Local storage: what is saved on your device
The solver saves the last problem you typed to your browser's localStorage under a single key, so that returning to the page shows your previous input rather than a blank box. This is a plain technical convenience, not a tracking mechanism: the value is readable only by this site, in your own browser, on your own device, and is never transmitted anywhere. You can clear it at any time by clearing your browser's site data for this domain, or simply by typing something new (which overwrites the saved value).
The feedback button
Below the solver is an optional 'Was this tool helpful?' control. Clicking it sends a small, anonymous signal (just a thumbs-up or thumbs-down count, with no identifying information, no IP address, and no cookie) to this site's own backend, purely so the count can be tallied. A local flag remembers that you already voted, so you are not prompted repeatedly on later visits, but that flag identifies nothing about you personally, it only prevents a duplicate vote from the same browser.
Analytics
If this site has Cloudflare Web Analytics enabled, it uses a cookie-free measurement approach: Cloudflare's own privacy-first analytics product does not set tracking cookies, does not fingerprint visitors, and does not track individuals across other websites. It reports aggregate figures only, such as total page views, and no consent banner is required for this kind of tool precisely because it does not track individuals in the way conventional cookie-based analytics do.
No accounts, no email collection
There is no sign-up form anywhere on this site, no password, and no email address is collected as a condition of using the solver. The only way an email address reaches this site at all is if you choose to write to the contact address below on your own initiative, in which case ordinary email applies (the message sits in an inbox until it is read and, eventually, deleted or archived, the same as any other email you send).
Third parties
This site does not sell, rent, or share any data with third parties for advertising or marketing purposes, because it does not collect the kind of personal data that would make that possible in the first place. The math library that powers the solver (mathjs, an open-source project) runs entirely inside your browser as part of the page's own code; it does not phone home to any external service, and no third-party server is involved in solving your equation.
Children's privacy
This site does not knowingly collect personal information from anyone, including children, and by design has no sign-up flow through which personal information could be submitted in the first place.
Changes to this policy
If this policy changes, the updated version will be posted on this same page. Because this is a small, single-purpose tool with a simple, static architecture, changes here are expected to be rare and are typically limited to reflecting an actual change in how the site is built (for example, if an optional analytics or feedback feature is added, removed, or changed) rather than shifting terms retroactively.
Why the tool is built this way
Running the solver entirely client-side was a deliberate design choice, not just a privacy nicety. A math expression, particularly one you might be working through for a homework problem, a work calculation, or anything else, is the kind of input people reasonably expect to stay private. Building the tool so that it is architecturally incapable of seeing that input (rather than promising not to look at data it could technically collect) is a stronger guarantee than a policy statement alone, and it happens to also make the tool faster, since there is no round trip to a server for every calculation.
Contact
Questions about this policy, or about the site generally, can be sent to contact@mathsolverfree.xyz. This is a small, independently run tool, so replies may take a little while, but every message is read.