Welcome

TLS/SSL Certificate Checker with OCSP/CRL revocation checking

Key Features

Chrome Extension

Lightweight browser extension that checks TLS certificates for every HTTPS page you visit. Instant visual feedback with clear status indicators.

Self-Hostable API

Run your own API backend. Built with Fastify for speed and low resource usage. Perfect for self-hosted environments.

Revocation Checking

OCSP and CRL certificate revocation checking is always enabled. Never miss a revoked certificate.

Chrome Web Store Ready

Package as a ZIP directly from the build. Ready for Chrome Web Store submission.

Container Ready

Deploy anywhere with our Docker/Podman container. Lightweight Alpine-based image.

Open Source

Free to use, modify, and distribute. Licensed under AGPL-3.0.

Quick Start

# Install dependencies
npm install

# Build Chrome extension
node scripts/build.js chrome

# Run API locally
npm run start:api

# Or use Podman
podman run --rm -p 3000:3000 ghcr.io/secanis/tlscheck-api:0.0.0-dev

The extension checks every HTTPS page automatically and displays certificate status with clear visual indicators.