Fleece

Works with System.Text.Json, NewtonSoft.Json, FSharp.Data, and System.Json, providing a consistent interface across different JSON backends, as highlighted in the description.

Enables bidirectional mapping with a single definition for records and discriminated unions, reducing boilerplate code, demonstrated in the CODEC section with examples.

Supports applicative and monadic parsing via FSharpPlus or FSharpx.Extras, allowing elegant and composable JSON handling, as shown in the monadic parsing examples.

Allows focused operations like view, write, and update on specific JSON parts, providing fine-grained control without parsing entire structures, mentioned in the Json Lenses section.