DNS Toolbox & Record Inspector
Query DNS records, TTL, resolver status, and DNSSEC signals with practical diagnostics.
Web & networkBrowser toolbox
Web & network tools
Inspect APIs, network traffic, DNS, browser compatibility, performance, accessibility, redirects, caching, and real-time web protocols.
Browse by category
12 categoriesWeb & network
18 tools available
IP, CIDR & Subnet Planner
Calculate IPv4 and IPv6 networks, split CIDRs, summarize ranges, and allocate VLSM plans.
Web & networkOpenAPI Editor & Contract Tester
Design, validate, document, mock, generate code, and compare OpenAPI contracts locally.
Web & networkAPI Request Tester
Compose, send, inspect, save, and reproduce HTTP API requests from one workspace.
Web & networkGraphQL Query & Schema Explorer
Run, validate, document, and reproduce GraphQL operations with live or imported schemas.
Web & networkWebSocket & SSE Tester
Open real realtime connections, inspect traffic, measure sessions, reconnect, and export evidence.
Web & networkHAR Network & Performance Analyzer
Inspect request waterfalls, bottlenecks, payloads, caching, failures, and before/after captures locally.
Web & networkAsyncAPI Editor & Validator
Validate, explore, sample, migrate, and compare AsyncAPI event-driven contracts.
Web & networkProtobuf & gRPC-Web Tester
Compile proto schemas, encode and decode messages, inspect wire fields, compare contracts, and call gRPC-Web.
Web & networkWeb Accessibility Checker & Repair Guide
Audit local HTML with axe-core, inspect WCAG findings, compare baselines and plan practical repairs.
Web & networkSEO Metadata & Structured Data Checker
Build, inspect and audit page metadata, JSON-LD, robots.txt and sitemaps locally.
Web & networkAPI Mock & Scenario Builder
Turn OpenAPI or HAR into success, failure and latency scenarios with reusable test handlers.
Web & networkWeb Performance & Core Web Vitals Analyzer
Analyze and compare Lighthouse, Web Vitals and HAR data with explicit budgets and local reports.
Web & networkBrowser Compatibility & Baseline Checker
Scan web code, evaluate Baseline and target browser support, and generate toolchain policies locally.
Web & networkRedirect & URL Migration Checker
Design, simulate and audit ordered redirect maps before a site migration.
Web & networkHTTP Cache Simulator & CDN Policy Generator
Simulate HTTP cache freshness, audit headers and generate reviewable CDN policies.
Web & networkAPI Contract Diff Checker
Compare OpenAPI, AsyncAPI or GraphQL versions and explain breaking changes locally.
Web & networkWebRTC Camera, Microphone & Call Test
Test camera, microphone, screen sharing and local WebRTC quality before a call.
Web & network