Accepts Unix seconds (10 digits), Unix milliseconds (13 digits) or any parseable date string such as 2026-01-01 00:00:00 UTC.

Apply one or two stacked discounts and see the final price and what you saved.

Project savings or investments forward with optional monthly deposits.

Wall-clock time in any IANA zone to any other via the engine's own Intl.DateTimeFormat, so daylight saving and half-hour zones are always right.

Flip up to 500 coins at once and get the heads and tails tally.

Turn a CSV table into clean YAML with typed scalars, quoted strings and a list of maps.

Strip JSON whitespace or pretty-print it, with key sort and duplicate detection.

Infer a draft 2020-12 JSON Schema from a sample document, with types and required keys.

Decode a JSON Web Token, list its claims on a timeline and flag expiry.