Dev tools · alternatives · 2026

24 alternatives to Cyjson – Fast and Efficent JSON Parser for Python

Cyjson is a JSON parser for Python designed for fast and efficient data processing. It is built for developers who need to parse JSON files quickly in their Python projects. The tool leverages performance optimization… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Cyjson – Fast and Efficent JSON Parser for Python launched in 2015; newer entries below may have overtaken it.

1. 1
   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 →

2. 2
   fastjson - Fast JSON Parsing for Go▲20

   Fast JSON parser and validator for Go. No custom structs, no code generation, no reflection - valyala/fastjson

   2018 · github.com · its alternatives →

3. 3PL
   Parson, lighweight json parser in C▲46

   2012 · kgabis.github.com · its alternatives →

4. 4
   ffjson: faster json serialization in Go▲83

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

5. 5
   ezjson▲138

   JSON parsing, formatting, sorting and comparing

   2024 · its alternatives →

6. 6
   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 →

7. 7
   QuickPYTHON▲181

   2020 · timothycrosley.github.io · its alternatives →

8. 8
   Codon: A Compiler for High-Performance Pythonic Applications and DSLs [pdf]▲54

   2023 · regmedia.co.uk · its alternatives →

9. 9
   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 →

10. 10
    OK JSON▲104

    The ultimate JSON formatter for your Mac

    2023 · okjson.app · its alternatives →

11. 11
    JSON Sharp▲73

    Tool for lazy developers to convert JSON to C# Objects

    2020 · jsontocsharpconverter.web.app · its alternatives →

12. 12
    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 →

13. 13
    Quick JSON Formatter▲72

    Quickly formats JSON with a simple right click, no copy

    2023 · chromewebstore.google.com · its alternatives →

14. 14
    fastgron: A JSON to GRON Converter That's 40 Times Faster Than Gron▲23

    Hello HN! I want to introduce fastgron, my new project. fastgron is a JSON to GRON converter, built to be incredibly fast – it's 40 times faster than Gron. GRON is a tool for making JSON greppable, but it can slow down with larger files. With fastgron, even a 200MB JSON file can be converted in just 1 second. Key features include streaming conversion for memory efficiency and an optimized path reconstruction for faster operations. It leverages C++ and the simdjson and fast_io libraries for speed. I welcome all feedback, suggestions, or questions. Thank you!

    2023 · github.com · its alternatives →

15. 15
    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 →

16. 16
    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 →

17. 17
    LJSON: JSON extended with pure functions▲39

    JSON extended with pure functions. Contribute to VictorTaelin/LJSON development by creating an account on GitHub.

    2015 · github.com · its alternatives →

18. 18EC
    ExcelJSON – Convert JSON To/from CSV, TSV Easily▲50

    2017 · exceljson.com · its alternatives →

19. 19JB
    JSON Browse – Fetch, filter and manipulate your JSON inside the browser▲138

    2017 · jsonbrowse.com · its alternatives →

20. 20JI
    JSON.is▲100

    2016 · json.is · its alternatives →

21. 21
    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 →

22. 22
    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 →

23. 23
    SJSON – a fast and simple way to set a value in JSON▲11

    Set JSON values very quickly in Go. Contribute to tidwall/sjson development by creating an account on GitHub.

    2016 · github.com · its alternatives →

24. 24
    JSON5 — modern JSON▲64

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

    2012 · 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 →