Life & fun · alternatives · 2026

24 alternatives to JSON Parser in C

A JSON parser in c with some SIMD optimisation for skipping whitespace. The numerical and string parsing functions split out so they are independantly runnable. They were for me the 2 most difficult to understand how they work and to show how the parser was composed of lots of smaller parsers.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. JSON Parser in C launched in 2023; newer entries below may have overtaken it.

1. 1PL
   Parson, lighweight json parser in C▲46

   2012 · kgabis.github.com · its alternatives →

2. 2
   Very low footprint JSON parser in portable ANSI C▲111

   Very low footprint DOM-style JSON parser written in portable ANSI C - json-parser/json-parser

   2012 · github.com · its alternatives →

3. 3
   JSON Sharp▲73

   Tool for lazy developers to convert JSON to C# Objects

   2020 · jsontocsharpconverter.web.app · its alternatives →

4. 4
   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 →

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
   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 →

7. 7BJ
   Bitwise JSON Parser written in C▲6

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

8. 8
   Jb / json.bash – Command-line tool (and bash library) that creates JSON▲183

   jb is a UNIX tool that creates JSON, for shell scripts or interactive use. Its "one thing" is to get shell-native data (environment variables, files, program output) to somewhere else, using JSON encapsulate it robustly. I wrote this because I wanted a robust and ergonomic way to create ad-hoc JSON data from the command line and scripts. I wanted errors to not pass silently, not coerce data types, not put secrets into argv. I wanted to leverage shell features/patterns like process substitution, environment variables, reading/streaming from files and null-terminated data. If you…

   2024 · github.com · its alternatives →

9. 9
   Json parser in 20 lines of bash▲13

   micro json parser. Contribute to izabera/j development by creating an account on GitHub.

   2015 · github.com · its alternatives →

10. 10JI
    JSON.is▲100

    2016 · json.is · its alternatives →

11. 11
    Fast C-based HTML 5 parsing for Python▲169

    Fast C based HTML 5 parsing for python. Contribute to kovidgoyal/html5-parser development by creating an account on GitHub.

    2017 · github.com · its alternatives →

12. 12
    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 →

13. 13
    uDSV.js – A faster CSV parser▲67

    Hey folks! I know CSV parsers (especially in JS) aren't terribly exciting and someone writes a "better" one every week. I'm in the middle of my parental leave, and this was a project that came out of me looking for the fastest/smallest CSV parser. It all started so innocently, and then turned into a benchmark-validation-athon; the library itself took ~2 weeks to write, but the performance comparisons took another ~4 weeks (on and off). The benchmarks were a huge effort, but I think they are the most thorough to date, both in breadth and in depth, so hopefully you find them useful:…

    2023 · github.com · its alternatives →

14. 14
    Cyjson – Fast and Efficent JSON Parser for Python▲10

    2015 · github.com · its alternatives →

15. 15
    JSONverify▲92

    A web tool that validates and format JSON objects

    2021 · jsonverify.com · its alternatives →

16. 16
    StaticJSON: fast, direct and static typed parsing of JSON with C++▲18

    Fast, direct and static typed parsing of JSON with C++ - netheril96/StaticJSON

    2016 · github.com · its alternatives →

17. 17
    Python JSON library in Rust, faster than ujson▲40

    Fast, correct Python JSON library supporting dataclasses, datetimes, and numpy - ijl/orjson

    2018 · github.com · its alternatives →

18. 18
    JSON Parser▲8

    Awesome way to view JSON.

    2018 · jsonformatter.org · its alternatives →

19. 19
    JSON5 — modern JSON▲64

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

    2012 · github.com · its alternatives →

20. 20
    Jsong: faster than light streaming JSON parser and writer in C▲9

    2017 · github.com · its alternatives →

21. 21
    I built a CSV parser to try Go 1.26's new SIMD package▲8

    Hey HN, A CSV parser using Go 1.26's experimental simd/archsimd package. I wanted to see what the new SIMD API looks like in practice. CSV parsing is mostly "find these bytes in a buffer"—load 64 bytes, compare, get a bitmask of positions. The interesting part was handling chunk boundaries correctly (quotes and line endings can split across chunks). - Drop-in replacement for encoding/csv - ~20% faster for unquoted data on AVX-512 - Quoted data is slower (still optimizing) - Scalar fallback for non-AVX-512 Requires GOEXPERIMENT=simd.…

    Jan 2026 · github.com · its alternatives →

22. 22
    Quantum JSON Parser▲14

    Parse, visualize, and repair JSON & Swift debug output.

    2025 · quantom-json.vercel.app · its alternatives →

23. 23JD
    Jison Debugger – A visual editor for JavaScript parsers and lexers▲24

    2015 · nolanlawson.github.io · its alternatives →

24. 24
    JSON-qs – JSON in query strings, human-readable, compact▲13

    2024 · 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 →