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-calculatorDevelopment
An interactive JSONPath REPL that runs multi-step query pipelines against any JSON. Write one JSONPath expression per line (e.g. $..book[?(@.price<10)] then $[0:5]) and see each step's matches with counts, paths, and values — plus a shareable URL that encodes your data and pipeline. Supports recursive descent ($..), wildcards ([*]), filters ([?(@.price<10)]), slices ([0:5:2]), and negative indices.
jsonpath-repl-playgroundDevelopment
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-linterDevelopment
Convert JSON data into Java classes with Jackson @JsonProperty annotations, private fields, getters, and setters
json-to-javaDevelopment
Convert JSON data into Kotlin data classes with @SerializedName annotations, nullable handling, and nested type inference
json-to-kotlinDevelopment
Convert JSON data into Rust structs with serde Serialize/Deserialize derives, snake_case fields, and serde rename attributes
json-to-rustDevelopment
Convert JSON data into TypeScript interfaces or type aliases with union types, optional fields, and nested object inference
json-to-typescriptNetwork
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-lookupNetwork
Parse pcap and basic pcapng captures, surface protocol hierarchy and session statistics, and export filtered packet summaries
network-packet-analyzerDevelopment
Query arbitrary JSON with JSONPath expressions, preview matches, switch output modes, and save reusable query templates
jsonpath-query-toolDevelopment
Match multiple regex patterns against text in one operation
multi-pattern-matcher