NEKO Checker

About

NEKO Checker (Notice Every Kind of Oversight) is a lightweight developer tool that uses a black cat icon to surface page issues in real time.

🐈‍⬛ The cat's expression tells the story
No issues? Calm face. OG tag problems? Side-eye. Console logs? Looking up. Errors? Looking away. Multiple issues? Angry eyes. The icon background shifts to red, yellow, or gray so you can spot problems at a glance.

✅ What it detects
• Missing or empty OG tags (og:title, og:description, og:image, og:url)
• Broken og:image links
• Leftover console.log / info / debug / warn calls
• console.error, uncaught exceptions, and unhandled Promise rejections
• HTTP 4xx / 5xx errors and connection failures (DNS, refused, etc.)

⚙️ Granular settings
Toggle each detection category on or off. Skip OG checks, ignore console.log, or disable network monitoring — customize to fit your workflow.

Catch oversights during development. Verify before shipping. Keep quality high every day.
Lightweight and privacy-friendly — your data never leaves your browser.