CertObserver CT Search

Scan your Django site for security flaws with this free, automated checkup tool. Forked from the Pony Checkup site.

Intense analysis of the configuration of any SSL web server

Free website security check, site antivirus, and server firewall (WAF) for PHP. Email notifications for registered users in the free tier.

Open source platform that lets you manage developer secrets across your team and infrastructure: everywhere from local development to staging/production 3rd-party services. Free for up to 5 developers.

REST API for fetching the information on the breaches.

Sync your .env files, quickly & securely. Stop sharing your .env files over insecure channels like Slack and email, and never lose an important .env file again. Free for up to 3 teammates.

Open Source CLI tool to prevent Kubernetes misconfigurations by ensuring that manifests and Helm charts follow best practices as well as your organization’s policies

A simple, intuitive web app for analyzing and decoding/encoding data without dealing with complex tools or programming languages. Like a Swiss army knife of cryptography & encryption. All features are free to use, with no limit. Open source if you wish to self-host.