It hooks into native objects like window.location , document.cookie , and XMLHttpRequest .
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listeners: - name: http_in bind: 0.0.0.0:443 tls: mode: terminate cert: /etc/uv/certs/proxy.pem routing: default: upstream: origin_pool cache: enabled: true ttl: 5m policies: - name: block_trackers match: url.host contains "tracker" or header.User-Agent contains "badbot" action: block auth: oidc: issuer: https://auth.example.com client_id: uv-proxy observability: prometheus: true tracing: opentelemetry ultraviolet sophisticated web proxy
It adheres to the TompHTTP spec, allowing it to communicate with "Bare" or "Wisp" servers that fetch data on behalf of the user.
// Use the Ultraviolet codec to encode the URL // This creates the proxy URL format const encodedUrl = Ultraviolet.codec.xor.encode(url); It hooks into native objects like window
: Includes support for "tab cloaking," which allows a browser tab to be disguised as a common educational site like Google Classroom to hide activity from local monitoring.
Unlike traditional VPNs or simple web proxies, Ultraviolet operates entirely within your browser. This means no software installation, no system-level configuration changes, and no administrative privileges are required—making it particularly valuable for students on school networks, employees in restricted workplaces, or travelers relying on public Wi-Fi with heavy filtering. listeners: - name: http_in bind: 0
An "ultraviolet sophisticated web proxy" (interpreted here as a high-capability, privacy- and performance-focused proxy system) is an intermediary service that forwards client HTTP(S)/WebSocket requests to origin servers while providing advanced features such as content filtering, caching, encryption handling, protocol translation, traffic inspection, and access controls.
It properly manages stateful data, allowing users to log into accounts and maintain active sessions securely.
Risk: Free proxy injects ads or steals credentials. Mitigation: Run your own Ultraviolet instance on a private VPS.
Standard proxies use obvious prefixes (e.g., https://proxy-site.com/https://google.com ). Firewalls can spot this pattern in milliseconds. Ultraviolet uses a scramble cipher to encode destination URLs into seemingly random paths.