NEKO Checker

by Pentaprogram · Developer Tools

Manifest V3 Free

View in Chrome Web Store Data as of 16 Oct 2026

A black cat icon that visualizes page issues at a glance: console logs, errors, OG tag problems, and network failures.

Users

+1 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#136K

#113K among extensions

Version

0.2.1

updated 1 Jul 2026

Users

monthly, 4 months

Latest, 16 Oct 2026: 27 usersMove the mouse over the chart for any month

Ratings count

monthly, 4 months

Latest, 16 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About NEKO Checker

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? Airplane ears. 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.