json.h vs Jansson

json.h

🗄️ single header json parser for C and C++ (by sheredom)

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Jansson

C library for encoding, decoding and manipulating JSON data (by akheron)

JSON C

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digip.org

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json.h		Jansson
	Project
-	Mentions	6
664	Stars	2,976
-	Growth	-
2.9	Activity	6.2
3 months ago	Latest Commit	9 days ago
C	Language	C
The Unlicense	License	GNU General Public License v3.0 or later

The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

json.h

Posts with mentions or reviews of json.h. We have used some of these posts to build our list of alternatives and similar projects.

We haven't tracked posts mentioning json.h yet.
Tracking mentions began in Dec 2020.

Jansson

Posts with mentions or reviews of Jansson. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-05-07.

A good C library to parse json data
5 projects | /r/C_Programming | 7 May 2023

I'm a fan of jansson easy to use and great documentation
jemi: a compact JSON serializer for embedded systems
11 projects | /r/embedded | 5 Oct 2022

Context: I needed to emit rather complex compound JSON data for a C-based project I'm working on. I could do it all with sprintf(), but it got messy quickly. I looked at available libraries such as jansson and CCAN's json, but they both used malloc(), which isn't an option in my case.
How can I parse JSON with C?
3 projects | /r/C_Programming | 21 Oct 2021

I find jansson quite usable and minimal: https://github.com/akheron/jansson
Good json libraries?
1 project | /r/C_Programming | 22 Jul 2021

JanSON has been really good for my uses. Simple, intuitive, fast.
How I cut GTA Online loading times by 70%
7 projects | /r/programming | 28 Feb 2021

I don't see why something like Jansson wouldn't.
C Deep
80 projects | dev.to | 27 Feb 2021

Jansson - Library for encoding, decoding and manipulating JSON. MIT

What are some alternatives?

When comparing json.h and Jansson you can also consider the following projects:

json-c - https://github.com/json-c/json-c is the official code repository for json-c. See the wiki for release tarballs for download. API docs at http://json-c.github.io/json-c/

json - JSON for Modern C++

cJSON - Ultralightweight JSON parser in ANSI C

frozen - JSON parser and generator for C/C++ with scanf/printf like interface. Targeting embedded systems.

RapidJSON - A fast JSON parser/generator for C++ with both SAX/DOM style API

libjson - a JSON parser and printer library in C. easy to integrate with any model.

JsonCpp - A C++ library for interacting with JSON.

JSON++ - A JSON parser in C++

JSMN - Jsmn is a world fastest JSON parser/tokenizer. This is the official repo replacing the old one at Bitbucket