Build a wedding budget by category, track what is paid, and see what is still owed.
Convert a UTC instant into the wall-clock time of any city, showing the offset and whether daylight saving is in force, and read the same conversion backwards to prove the sign of the offset.
Count down a number of minutes from now or to a fixed date and time, with a zero-padded seconds field, a progress bar, and pause, reset and plus or minus five minute nudges.
Set an alarm a number of seconds ahead or at a wall-clock time, watch it count down to zero, and see it ring with a five minute snooze and a log of every state change.
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.
Brightness, contrast, saturation, temperature, highlights and shadows applied to the real pixels.
