Developer tools for tasks that were supposed to take five minutes
Inspect, validate and convert before the incident gets its own Slack channel. No signup required.
- Browser-first
- No signup
- Observable results
Web quality
GEO readiness audit
Check whether a page is accessible, structured, attributable, and easy for answer engines to understand and cite.
Open tool → 02Technical SEO audit
Find redirect mistakes, crawler traps, duplicate URL spaces, canonical problems, and sitemap gaps.
Open tool → 03Favicon Kitchen & Dark-Mode SVG Suite
Generate dark-mode adaptive vector favicons, multi-resolution ICOs, Apple touch icons, and Android PWA bundles with safe-zone masking.
Open tool → 04CORS Policy & Preflight Sandbox
Diagnose cross-origin headers, preflight OPTIONS requests, wildcard credentials safety, and browser max-age limits.
Open tool →Email & identity
BIMI Studio & Live Inbox Simulator
Prepare strict SVG Tiny 1.2 PS brand marks with safe-zone padding and live inbox simulator for Gmail, Apple Mail, and Yahoo.
Open tool → 06Domain security & deliverability
1-click verification of DMARC policies, BIMI records, MTA-STS strict transport security, SMTP TLS-RPT, and SPF.
Open tool →Infrastructure
Nginx & Apache ➔ Caddyfile Converter
Convert Nginx server blocks and Apache .htaccess into clean, idiomatic Caddyfiles with real-time smart mapping, migration advisories and 1-click presets.
Open tool → 08Visual CIDR & Subnet Overlap Matrix
Analyze IPv4/IPv6 CIDR blocks, detect IP range overlap collisions, view 2D spatial tree partitions, and find available free subnets.
Open tool → 09Regex Dialect Transpiler & Compatibility Matrix
Transpile PCRE regex to Go RE2, JavaScript, Python, and Rust, analyze lookaround/backreference safety, and guarantee linear O(N) ReDoS protection.
Open tool → 10Live DNS Delegation Trace
Query real DNS records and inspect the authoritative nameservers returned for a domain.
Open tool →Mobile & Wallet
Apple Wallet (.pkpass) Inspector & Debugger
Pixel-perfect Apple Wallet & Google Wallet emulator, SHA-1 manifest validator, PKCS#7 certificate inspector, and 1-click package repair.
Open tool → 12Apple Universal Links & Android App Links
Validate Apple AASA and Android AssetLinks manifests, test URL routing patterns, and diagnose deeplink failures.
Open tool →AI coding
Private by default
Calculations stay in your browser. Crawled reports are cached to avoid repeatedly hitting a site.
Show the reasoning
Formulas, evidence, dates, and limitations appear next to the result instead of hiding behind a score.
One job at a time
Each tool is designed around one concrete task, with no paywalls, signups, or artificial delays.