Privacy policy
Last updated 2026-08-08.
The short version
User agent detection and parsing run entirely in your browser. Your user agent string, the strings you paste into the parser, and every environment detail shown on the home page are processed locally in JavaScript and are never sent to our servers.
What we do not collect
- Your user agent string
- Any string you paste into the parser
- Screen size, GPU, time zone, language or other environment details shown on this site
- Account details — there are no accounts
- Any personally identifying information
What is unavoidably processed
Server logs. Our hosting provider records standard web server access logs — IP address, timestamp, requested path, response code and user agent — for every request, as every web server does. These are retained briefly for security and diagnostics and are not used to build profiles.
Local storage. We store one value in your browser: your light or dark theme preference, under the key ua-theme. It never leaves your device, and clearing site data removes it.
The API. If you call the API, the string you send necessarily reaches our server to be parsed. It is parsed and returned; the endpoint keeps no record of its own beyond the standard access log described above. To avoid this entirely, use the JavaScript parser locally.
Cookies
This site sets no cookies of its own. If advertising is displayed, those providers may set their own — see below.
Third parties
This site may display advertising. Advertising partners may use cookies and similar technologies to serve and measure ads, governed by their own privacy policies rather than this one. No data from the detector or parser is available to them, because that data never reaches our servers to begin with.
No external fonts, script CDNs or analytics services are loaded. Every asset on this site is served from this domain.
Your rights
Because we hold no personal data about you, there is nothing to export, correct or delete. If you have a question about this policy, get in touch.
Changes
If this policy changes materially, the date at the top of this page will be updated.