Life & fun · alternatives · 2026

24 alternatives to Weird JSON

the JS/Node.JS library for encoding complex and unconventional data structures. Support for BigInts, TypedArrays, null, undefined, and Symbol. Multiple flavors available. - DO-SAY-GO/WeirdJSON

Weird JSON is a software tool that handles unusual or non-standard JSON data formats. Launched in 2022, it is designed for developers and data engineers who work with malformed, unconventional, or edge-case JSON… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Weird JSON launched in 2022; newer entries below may have overtaken it.

1. 1
   Weird JSON superset with BigInt, Infinity, TypedArray etc▲67

   the JS/Node.JS library for encoding complex and unconventional data structures. Support for BigInts, TypedArrays, null, undefined, and Symbol. Multiple flavors available. - DO-SAY-GO/WeirdJSON

   2020 · github.com · its alternatives →

2. 2TW
   This website is valid JSON▲604

   2020 · webdatarender.com · its alternatives →

3. 3
   My first open-source project release – RandomJson▲56

   Provides a Kotlin/Java library to create a random json string - mangatmodi/RandomJson

   2019 · github.com · its alternatives →

4. 4JI
   JSON.is▲100

   2016 · json.is · its alternatives →

5. 5
   JSON For You – Visualize JSON in graph or table views▲211

   After two years of improvement, I think it's time to share it with you all. Here’s a quick overview: - Common features include validation, formatting, minification, and more. - Visualize JSON in a graph or table view. - Structured comparison with fallback to text comparison. - Navigate though JSON using JSON pointer. - Supports jq. Would love to hear the community's questions, thoughts and comments!

   2024 · github.com · its alternatives →

6. 6
   JSON Query▲154

   I'm working on a tool that will probably involve querying JSON documents and I'm asking myself how to expose that functionality to my users. I like the power of `jq` and the fact that LLMs are proficient at it, but I find it right out impossible to come up with the right `jq` incantations myself. Has anyone here been in a similar situation? Which tool / language did you end up exposing to your users?

   Oct 2025 · jsonquerylang.org · its alternatives →

7. 7
   Gojay – Performant JSON encoder/decoder for Golang▲153

   high performance JSON encoder/decoder with stream API for Golang - GitHub - francoispqt/gojay: high performance JSON encoder/decoder with stream API for Golang

   2018 · github.com · its alternatives →

8. 8
   ffjson: faster json serialization in Go▲83

   2014 · journal.paul.querna.org · its alternatives →

9. 9
   JSON5 — modern JSON▲64

   JSON5 — JSON for Humans. Contribute to json5/json5 development by creating an account on GitHub.

   2012 · github.com · its alternatives →

10. 10
    jql – Easier jq Alternative with a Lispy Syntax Written in Go▲217

    Easy JSON Query Processor with a Lispy syntax in Go - cube2222/jql

    2020 · github.com · its alternatives →

11. 11
    Jason – A new JSON Library for Go▲106

    Easy-to-use JSON Library for Go. Contribute to antonholmquist/jason development by creating an account on GitHub.

    2014 · github.com · its alternatives →

12. 12
    A fast JSON library for Go▲119

    Fast JSON encoder/decoder compatible with encoding/json for Go - goccy/go-json

    2021 · github.com · its alternatives →

13. 13
    OK JSON▲113

    Format and view JSON with native Mac app

    2021 · okjson.app · its alternatives →

14. 14
    GPT-JSON – Structured and typehinted GPT responses in Python▲174

    Hey HN, I've been using GPT a lot lately in some side projects around data generation and benchmarking. During the course of prompt tuning I ended up with a pretty complicated request: the value that I was looking for, an explanation, a criticism, etc. JSON was the most natural output format for this but results would often be broken, have wrong types, or contain missing fields. There's been some positive movement in this space, like with jsonformer (https://github.com/1rgs/jsonformer) the other day. But nothing that was plug and play with GPT. This library consolidates…

    2023 · github.com · its alternatives →

15. 15JA
    JsonTree, a 3.53kb JavaScript tool for generating html trees from JSON▲78

    a lightweight dependency free javascript micro-library for making collapsable trees with JSON

    2017 · maxleiter.github.io · its alternatives →

16. 16
    I created a lightweight JavaScript library to visualize JSON as a graph▲62

    Effortlessly visualize JSON structures as dynamic tree diagrams - The-01-Company/jsontr.ee

    2024 · github.com · its alternatives →

17. 17IM
    I made a tool which fixes broken JSONs▲29

    2024 · prakhar897.github.io · its alternatives →

18. 18
    OK JSON▲104

    The ultimate JSON formatter for your Mac

    2023 · okjson.app · its alternatives →

19. 19
    Wrote a JSON parser from scratch in go▲22

    First time ever working on something like this, check it out

    2024 · github.com · its alternatives →

20. 20
    JSON Crack▲70

    Simple visualization tool for your JSON data.

    2022 · jsoncrack.com · its alternatives →

21. 21JA
    JSONScript – Asynchronous scripting language using JSON format▲49

    2016 · json-script.com · its alternatives →

22. 22
    JSON Sharp▲73

    Tool for lazy developers to convert JSON to C# Objects

    2020 · jsontocsharpconverter.web.app · its alternatives →

23. 23NM
    Npm module that makes easy to convert JSON to CSV▲64

    2017 · npmjs.com · its alternatives →

24. 24
    Jsn – A relaxed, user-friendly JSON-like data format▲18

    A relaxed, user-friendly json-like data format. Contribute to polymonster/jsn development by creating an account on GitHub.

    2019 · github.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →