Security
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-solverNetwork
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-lookupFormat Conversion
Convert GitHub-flavored Markdown into Slack-friendly mrkdwn and flag unsupported constructs
markdown-to-slack-mrkdwnMath & Numbers
Convert kilometers per liter to miles per gallon with configurable decimal precision
kml-to-mpgMath & Numbers
Convert liters per 100 kilometers to miles per gallon with configurable decimal precision
l-per-100km-to-mpgMedia
Convert Leica RAW files to JPEG format. Automatically extracts image dimensions and metadata from the RAW file.
leica-raw-to-jpgMedia
Convert Leica RAW files to PNG format. Automatically extracts image dimensions and metadata from the RAW file.
leica-raw-to-pngMath & Numbers
Convert kilopascals to standard atmospheres with configurable decimal precision
kpa-to-atmMath & Numbers
Convert kilopascals to bar with configurable decimal precision
kpa-to-barMath & Numbers
Convert kilopascals to millimeters of mercury with configurable decimal precision
kpa-to-mmhg