Best Web Free Security Software

The world’s most popular messaging app.

Comprehensive authentication framework

Secure, two‑factor Bitcoin wallet for mobile and web

Distributed operating system for blockchain app builders

Secure, Simple and Scalable Video Conferences

Open-source antivirus engine for detecting malware across platforms

Bitwarden‑compatible vault hosted on Cloudflare Workers for free

Open source password manager for teams

Automate cloud security and compliance

Peer-to-peer file transfer with no size limits and nothing stored on servers

Interactive, scriptable man‑in‑the‑middle proxy for HTTP, HTTPS and WebSocket traffic

Single Sign-On Multi-Factor portal for web apps

Unified XDR and SIEM protection for endpoints and cloud workloads

Free, open-source password manager

Fast and lightweight DNS proxy as ad-blocker for local network

Automate OSINT for threat intelligence and attack surface mapping

Secure, fast file transfers from the command line

A note-taking app with a focus on security and simplicity

Secrets detection for GitHub, GitLab and Bitbucket repositories

Fast and secure backup and versioning for files and directories

Network-wide ads & trackers blocking DNS server

A fast, secure Chromium‑based browser built for privacy.

The web app for all your data manipulation and decoding needs

Fast, secure, efficient backup program