# \[ANN\] JSON3.jl - Yet another JSON package for Julia

**URL:** <https://discourse.julialang.org/t/ann-json3-jl-yet-another-json-package-for-julia/25625>\
**Category:** Package Announcements\
**Created:** [June 24, 2019, 8:31pm UTC](https://discourse.julialang.org/t/ann-json3-jl-yet-another-json-package-for-julia/25625 "2019-06-24T20:31:10Z")\
**Posts on this page:** 1\
**Showing post:** 24

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**Author:** ![DataPsycho](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/datapsycho/32/16891_2.png) [@DataPsycho](https://discourse.julialang.org/u/DataPsycho)\
**Post date:** [September 19, 2020, 8:38pm UTC](https://discourse.julialang.org/t/ann-json3-jl-yet-another-json-package-for-julia/25625/24 "2020-09-19T20:38:00Z")

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I am having an issue when serializing If someone can help on this regards:

> [@JSON3 Package: ArgumentError: invalid JSON at byte .... : InvalidChar?](https://discourse.julialang.org/t/json3-package-argumenterror-invalid-json-at-byte-invalidchar/46933):
>
> Suppose I have two Structs one for Tweet and another for Author of the tweet as follows: struct User id::Union{Int64, Nothing} id\_str::Union{String, Nothing} created\_at::Union{String, Nothing} name::Union{String, Nothing} screen\_name::Union{String, Nothing} location::Union{String, Nothing} statuses\_count::Union{Int64, Nothing} followers\_count::Union{Int64, Nothing} description::Union{String, Nothing} profile\_image\_url::Union{String, Nothing} end struct T…

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