OverPhish is a free, open-source browser extension that blocks phishing sites in real time — no telemetry, no accounts, no nonsense.
Available now on Chrome • Firefox & Edge coming soon
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.
Questions, comments, or just want to say hi? We’d love to hear from you.