Math & Numbers
Convert liters to US liquid pints with configurable decimal precision
liter-to-pintMath & Numbers
Convert liters to US liquid quarts with configurable decimal precision
liter-to-quartDevelopment
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
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-typescriptSecurity
Generate JSON Web Keys (JWK) for RSA, EC (P-256/P-384/P-521/secp256k1), and OKP (Ed25519/Ed448/X25519/X448), or parse an existing JWK to inspect its parameters, thumbprint, and metadata
jwk-generatorSecurity
Decode a JWT (header + payload) with syntax highlighting, diagnose standard claims, and verify the signature with HS*/RS*/PS*/ES*/EdDSA keys — plus a tampered-token forgery demo
jwt-inspector-verifierAstronomy
Numerically solve Kepler’s equation E − e·sin(E) = M for eccentric anomaly E, true anomaly ν, orbital radius and relative speed, with Newton/bisection/fixed-point methods, convergence history and an SVG orbit diagram
kepler-orbit-solver