Life & fun · alternatives · 2026

24 alternatives to Jsong: faster than light streaming JSON parser and writer in C

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Jsong: faster than light streaming JSON parser and writer in C launched in 2017; newer entries below may have overtaken it.

1. 1
   A lightweight JSON Parser without memory allocation in ~250 LOC▲9

   2014 · github.com · its alternatives →

2. 2JA
   jq, a lightweight commandline JSON processor▲5

   2012 · stedolan.github.com · its alternatives →

3. 3
   The Changelog - #189: JSON API with Yehuda Katz▲66

   Yehuda's start as a programmer and the spec for building API

   2016 · changelog.com · its alternatives →

4. 4BJ
   Bitwise JSON Parser written in C▲6

   2014 · web.cs.dal.ca · its alternatives →

5. 5
   KORE.io▲88

   A fast SPDY capable web server for web development in C

   2015 · kore.io · its alternatives →

6. 6
   A Fast, Malloc-Free C++14 Json Parser and Encoder▲98

   Meta programming utilities for C++14. Merged in matt-42/lithium - matt-42/iod

   2014 · github.com · its alternatives →

7. 7AS
   A Super Simple JSON CMS▲8

   2018 · medium.com · its alternatives →

8. 8
   JsonTree, a tool for turning JSON data into a collapsible html tree▲9

   A lightweight vanilla Javascript micro-library for making collapsible trees with JSON - MaxLeiter/jsonTree

   2016 · github.com · its alternatives →

9. 9
   Semi-index - Speed up JSON parsing in MapReduce-like tasks▲9

   Implementation of the JSON semi-index described in the paper "Semi-Indexing Semi-Structured Data in Tiny Space" - ot/semi_index

   2011 · github.com · its alternatives →

10. 10
    JSON Parser▲8

    Awesome way to view JSON.

    2018 · jsonformatter.org · its alternatives →

11. 11
    JSONPlus: a json parser with self reference and templating▲7

    JSON parser that supports self reference and comments - serkanyersen/jsonplus

    2015 · github.com · its alternatives →

12. 12
    Incremental JSON parser for streaming LLM tool calls in Ruby▲13

    Built this for streaming AI tool calls. LLMs stream function arguments as JSON character-by-character. Most parsers reparse from scratch each time - O(n²) behavior that causes UI lag. This maintains parsing state, processing only new characters. True O(n) performance that stays imperceptible throughout the entire response. Ruby gem, MIT licensed. Would love feedback.

    2025 · aha.io · its alternatives →

13. 13CH
    Concord – High Performance Stream Processing with C++ and Apache Mesos▲7

    2016 · concord.io · its alternatives →

14. 14
    bote - A fast, modern and low-memory approach to processing a big JSON▲5

    A fast, modern and low-memory approach to processing a big JSON - jankdc/bote

    Jun 2026 · github.com · its alternatives →

15. 15AO
    an order-preserving JSON encoding (so byte-order == value-order)▲7

    2010 · keyjson.org · its alternatives →

16. 16AA
    Awl, a toy Lisp language written in C and transpiled to JavaScript▲8

    2014 · skepsi.me · its alternatives →

17. 17
    Muon, a meson implementation written in C▲5

    2021 · sr.ht · its alternatives →

18. 18
    Encrusted – A Zork Interpreter Written in Rust / WebAssembly▲6

    2018 · sterlingdemille.com · its alternatives →

19. 19NJ
    Noise – JSON search engine library▲6

    2017 · noisesearch.org · its alternatives →

20. 20RA
    Ronin – a toolkit for building CLI apps in Node.js easy and fast▲5

    2014 · vdemedes.github.io · its alternatives →

21. 21MA
    Molten, a modern API framework for Python▲7

    2018 · moltenframework.com · its alternatives →

22. 22
    Bulk set properties recursively in complex JSON string trees▲8

    An Experimental Regex Engine to Parse and Apply Bulk Changes to a JSON String Without Using 'JSON.parse()' for Deserialization - patternhelloworld/json-knife

    2022 · github.com · its alternatives →

23. 23AJ
    A JSON Viewer with indentation based highlighting, and table-view mode▲9

    2018 · json-viewer.sohamkamani.com · its alternatives →

24. 24JE
    JSON Editor for macOS▲5

    2022 · theapiscout.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 →