Free · No signup · No "premium tier"
SEO & developer tools,forged from bugs.
Every tool here started as a production bug that ruined one of my weeks. I fixed it, then turned the fix into something you can run on your own site. Paste a URL, get answers — that's the whole deal.
A canonical tag silently pointed to localhost in production. Google de-indexed the page for weeks.
<link rel="canonical" href="http://localhost:3000/" />Canonical URL Checker
Paste any URL and see whether your canonical tag, og:url, and JSON-LD schema URLs agree — and whether any of them leaked localhost, the wrong protocol, or a stray port.
Two <title> tags fighting across a template. Google kept picking the wrong one.
<title>Real Page</title> … <title>Default</title>Meta Tag Auditor
Audit your title, description, Open Graph, and Twitter Card tags — catch duplicates, missing og:image, and bad lengths — and see your real social-share preview.
A sizes attribute claiming 32x32 pointing at a 16px file. Browsers picked it for the wrong slot.
<link rel="icon" sizes="32x32" href="/icon-16.png">Favicon Checker
See every icon a page declares, the real pixel size read from the file rather than the size the tag claims, and your icon previewed in a browser tab, a Google result and an iOS home screen. It also tells you whether your SVG adapts to dark mode.
A transparent logo saved to an iOS home screen, composited onto black into an unreadable smear.
<link rel="apple-touch-icon" href="/logo-transparent.png">Favicon Generator
Upload one image and watch it render live in a browser tab, a Google result and an iOS home screen before you commit. Then download a real multi-size favicon.ico, the PNG set, an Apple touch icon flattened so iOS cannot ruin it, a manifest, and the HTML to paste.
Build queue
Not built yet — the bugs next in line.- #003Sitemap Validator — A sitemap quietly feeding Google 404s and noindex pages.queued
- #004Redirect Chain Tracer — A four-hop redirect bleeding link equity on every hit.queued
Each tool has a full write-up — the bug, the hunt, the fix, the git diffs. Read the Brain Dumps for the stories behind them.