OverPhish is a free, open-source browser extension that blocks phishing sites in
real time — no telemetry, no accounts,
no nonsense.
Be the first when we launch on Chrome, Firefox & Edge.
Instant Blocking
Bloom filter + Trie for sub-millisecond lookups. Blocks phishing before page loads.
Daily Updates
Aggregates the top 5 phishing & malware blocklists — every 24 hours.
Zero-Trust Architecture
No accounts, no telemetry, no data ever leaves your browser.
Lightweight
Under 300KB. No performance impact — even on low-end devices.
Open Source
Fully auditable code. Verify everything yourself in a public repository.
Clear Warnings
Vivid block page with “Allow Once” and “Whitelist” options to tailor your experience.
Join thousands waiting for the launch.