Developer tools for real infrastructure work
Inspect, validate and convert without creating an account. Each utility solves one concrete web, email or infrastructure problem and shows its evidence.
- Browser-first
- No signup
- Observable results
Web quality
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 → 04Domain 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 → 06Visual 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 →Mobile & Wallet
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 signup wall and no artificial waiting.