Last updated: August 24, 2026
OpenTechCheck — the browser extension, detection engine, and fingerprint registry — is open-source software licensed under the Apache License 2.0. Your use of the software is governed by that license.
The software and this website are provided "as is", without warranty of any kind. Technology detections are heuristic: they identify technologies from public signals in web pages and can be incomplete or wrong. Do not rely on detections as the sole basis for security, legal, or commercial decisions.
OpenTechCheck inspects pages you visit in your own browser. You are responsible for using it in compliance with the laws that apply to you and with the terms of the websites you visit.
Technology names and logos shown in the extension and on this site identify the detected products and belong to their respective owners. Their use here is nominative: it implies no affiliation with or endorsement by those projects or companies.
Changes to these terms are versioned in the public repository. Questions: open an issue.