Tor Browser
The anonymity browser: three encrypted hops, no single relay knowing both ends, and a face that looks like everyone else's.
About
Tor Browser is the Tor Project's free, open-source browser for anonymous communication, built on Firefox ESR. It routes traffic through the Tor network of roughly 12,600 volunteer relays (as of April 2025) using onion routing: your data is wrapped in multiple layers of encryption and passed through an entry guard, a middle relay, and an exit relay, each of which removes one layer and knows only its immediate neighbors. No single relay sees both who you are and where you are going. DNS resolution happens inside the Tor network, and .onion hidden services are reachable only through Tor. The browser itself is hardened for uniformity: it disables or limits WebRTC, canvas fingerprinting, font enumeration, and other APIs that make users trackable, because anonymity requires looking boring.
Tor is the tool of choice for journalists, activists, and whistleblowers in censored regions, with bridge relays and pluggable transports for places that block it. The price of the architecture is speed: three hops across volunteer relays is noticeably slower than a VPN, streaming and logins often break, and many sites block exit-node IPs. Using Tor does not encrypt traffic between the exit node and a non-HTTPS site, and running a relay network does not make the endpoint trustworthy. It is funded as a nonprofit, with no account and no upsell. No published performance benchmarks from the project; third-party measurements consistently show multi-second page loads versus direct browsing.
What it can do
- Onion routing through three volunteer relays with layered encryption
- No single relay sees both source and destination
- DNS resolved inside the Tor network
- Access to .onion hidden services
- Fingerprinting resistance: uniform browser fingerprint
- HTTPS enforcement with hardened certificate validation
- NoScript and tracker isolation built in
- Bridge relays and pluggable transports for censored regions
Setup
Download Tor Browser from torproject.org for Windows, macOS, Linux, or Android; no account needed. Enable a bridge if the network is blocked.
Prerequisites
None; Tor is free and account-free.
Use cases
Works with
Trust score — 9/10
Scored 9/10 (verified tier, metrics-v1). Evidence: extensive 2026 documentation confirms the three-relay onion-routing design with per-relay encryption layers, in-network DNS, ~12,600 volunteer relays, fingerprinting resistance, and bridge support; the browser is free, open source, and nonprofit-backed. Strengths: the strongest anonymity guarantees available to ordinary users, with no account and no data collection. Docked for: (1) slow speeds and frequent breakage or blocking by sites; (2) exit nodes see plaintext to non-HTTPS destinations; (3) anonymity depends on disciplined use and relay diversity. License: BSD-style open source.
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 9.0/10
- Maintenance · recency, releases, issue load
- 9.0/10
- Openness · license + docs
- 10.0/10
- Manual review · sanity read + red-flag check
- 9.0/10
- · The Tor Project; built on Firefox ESR
- · Onion routing: guard, middle, exit relay; layered encryption; no single relay sees both ends
- · ~12,600 volunteer relays (April 2025); DNS resolved inside the network
- · .onion hidden services reachable only via Tor
- · Fingerprinting resistance through a uniform browser fingerprint
- · Bridge relays and pluggable transports for censored regions
- · Slow speeds; exit-node IPs widely blocked; exit sees plaintext to non-HTTPS sites
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.