Network
Calculate how much each tunnel or encapsulation layer consumes from your interface MTU, the effective TCP MSS, and the DF ping probe size. For SRE, SD-WAN, and k8s CNI engineers.
mtu-and-mss-path-calculatorNetwork
Parse pcap and basic pcapng captures, surface protocol hierarchy and session statistics, and export filtered packet summaries
network-packet-analyzerDevelopment
Match multiple regex patterns against text in one operation
multi-pattern-matcherDevelopment
Parse and display named capture groups from regex patterns
named-group-testerDevelopment
Parse User Agent strings to extract browser, OS, device, and engine information
new-user-agent-parserDevelopment
Extract and analyze meta tags, Open Graph, Twitter Cards, and structured data from web pages
meta-tag-extractorNetwork
Generate an llms.txt file (llmstxt.org v2 format: H1, blockquote summary, H2 file lists) from a live site crawl or a pasted page inventory, and audit robots.txt policies for GPTBot, ClaudeBot, PerplexityBot and Bytespider using the RFC 9309 matching algorithm — with allow/block previews and ready-to-paste directives.
llms-txt-and-ai-crawler-auditDevelopment
Run a safe, curated set of Lodash helpers on JSON input.
lodash-online-utilityDevelopment
Statically check Markdown links for format errors, broken anchors, and undefined references (no network requests)
markdown-link-checkerDevelopment
Check Markdown for style issues: heading levels, code fences, list consistency, and more (zero-dependency rule engine)
markdown-linterNetwork
Look up the manufacturer of a MAC address from the IEEE OUI database, or reverse-search a company name to list all its OUI blocks — fully offline
mac-oui-vendor-lookupDevelopment
Convert structured service logs into Mermaid or PlantUML sequence diagrams, with optional latency and error annotations
log-sequence-diagram-converter