Implementation matrix

D = Decode E = Encode

Feature	TinyCBOR	node-cbor	cbor-ruby	impl4	PeterO.Cbor
Major type 0 (uint)	DE	DE			DE
Major type 1 (nint)	DE	DE			DE
Major type 2 (bstr)	DE	DE			DE
Major type 3 (tstr)	DE	DE			DE
Major type 4 (array)	DE	DE			DE
Major type 5 (map)	DE	DE			DE
Major type 6 (tag)	DE	DE			DE
Major type 7 (simple)	DE	DE			DE
Float16	DE	DE			D
Float32	DE	DE			DE
Float64	DE	DE			DE
Indefinite length array/map	DE	D			D
Indefinite length string	D	D			D[1]
Canonical CBOR	DE[2]	DE			D
Tag 0	DE[2]	D			DE
Tag 1	DE[2]	DE			DE
Tag 2	DE[2]	DE			DE
Tag 3	DE[2]	DE			DE
Tag 4	DE[2]	DE			DE
Tag 5	DE[2]	D			DE
Tag 21	DE[2]
Tag 22	DE[2]
Tag 23	DE[2]
Tag 24	DE[2]
Tag 32	DE[2]	DE			DE
Tag 33	DE[2]
Tag 34	DE[2]
Tag 35	DE[2]	DE			DE
Tag 36	DE[2]
Tag 55799	DE[2]

[1]: There appears to be code to implement this, but I have not figured out how to make it run.

[2]: TinyCBOR encodes and decodes what the application code specifically requested. It does not automatically use any tag, does not convert between floating point types and its output may not be canonical. But they are all possibilities in the API.