BlackCrab
Free Developer Tools for Modern Web Development
fast, privacy-focused utilities for developers — no signup required.
Developer Tools
Everything you need in one place — no sign-up, no tracking.
SSL Checker
Check SSL certificate details for any domain — expiry date, issuer, validity period, and key strength.
Domain Info
Look up domain registration information including registrar, creation date, and name servers.
Uptime Checker
Test response time and availability of any URL with real-time status checks.
JSON Formatter
Format, validate, and beautify JSON data with syntax highlighting and error detection.
Base64 Tool
Quickly encode and decode Base64 strings with copy-to-clipboard support.
Regex Tester
Test regular expressions against sample text with real-time match highlighting and flag support.
Latest from the Blog
Insights, tutorials, and developer tips.
Blog posts coming soon. Check back regularly for new content.