Duper – The Format That's Super

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Duper – The Format That's Super is a business in show hn launch.

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An MIT-licensed human-friendly extension of JSON with quality-of-life improvements (comments, trailing commas, unquoted keys), extra types (tuples, bytes, raw strings), and semantic identifiers (think type annotations).Built in Rust, with bindings for Python and WebAssembly, as well as syntax highlighting in VSCode. I made it for those like me who hand-edit JSONs and want a breath of fresh air.It's at a good enough point that I felt like sharing it, but there's still plenty I wanna work on! Namely, I want to add (real) Node support, make a proper LSP with auto-formatting, and get it out there before I start thinking about stabilization.

Duper – The Format That's Super is positioned in show hn launch, a segment that rewards a clear, focused offering.

It is recorded at the Show HN launch stage.

Website: duper.dev.br