Is Facebook showing the wrong thumbnail for your WordPress links? Learn how to fix incorrect Facebook share images by managing Open Graph tags and clearing cache. Step-by-step guide included.

Free online file hash calculator. Compute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 checksums directly in your browser. No uploads, no dependencies, 100% client-side.

Parse browser, OS, and device from User-Agent string. Extract detailed client information for debugging.

Format and beautify SQL queries with proper indentation. Supports SELECT, JOIN, WHERE clauses and more.

Parse and inspect JWT tokens client-side. Decode header, payload, and signature. Security-focused debugging tool.

Generate random MAC addresses and validate format. Supports multiple notation styles for network configuration.