Development
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-playgroundValidation
Validate or generate numbers using the Luhn algorithm (mod-10). Works for credit cards, IMEI, IMEISV, SIN, NPI and any custom Luhn-based identifier.
luhn-checksumDevelopment
Statically check Markdown links for format errors, broken anchors, and undefined references (no network requests)
markdown-link-checkerText Processing
Lint Markdown against ~15 markdownlint rules plus 2 Chinese-typography rules, with line-located reports and one-click auto-fix of safe issues
markdown-lint-style-checkerDevelopment
Check Markdown for style issues: heading levels, code fences, list consistency, and more (zero-dependency rule engine)
markdown-linterFormat Conversion
Generate a table of contents from Markdown headings with GitHub-style anchor links
markdown-toc-generatorDevelopment
Convert JSON data into C# classes with PascalCase properties, JsonPropertyName attributes, and nested type inference
json-to-csharpDevelopment
Convert JSON data into Go struct definitions with json struct tags, exported PascalCase fields, and nested type inference
json-to-goDevelopment
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-typescript