# akheron/jansson

C library for encoding, decoding and manipulating JSON data

Repository: https://github.com/akheron/jansson
Canonical: https://ross.abutalabs.com/products/jansson
Homepage: http://www.digip.org/jansson/
Language: C
License: NOASSERTION
License Family: other
Topics: c, json
Last push: 2026-07-09T17:43:34+00:00

## Health v2 (maintenance only)
Score: 82/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 91, release rhythm 59, longevity 100
- inputs: {"age_days": 6341, "days_push": 55, "days_rel": 63, "gap_med": 232.0, "n_releases_24m": 3}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3359, forks 849 (observed 2026-08-28T04:07:58.040824+00:00)

## What it is
Jansson is a C library for encoding, decoding, and manipulating JSON data. It offers a simple API, full UTF-8 Unicode support, and no dependencies on other libraries.

## Use cases
- parse json in c
- encode json from c program
- decode json files in c
- manipulate json data structures in c
- embed json support in embedded c project
- serialize data to json in c

## When to choose
- you need a lightweight, dependency-free JSON library for C
- you want full Unicode/UTF-8 support
- you need a well-documented, extensively tested JSON parser
- you target multiple platforms including Android

## When to avoid
- you are working in C++ and prefer a native C++ JSON library
- you need JSON schema validation or JSONPath queries
- you want a header-only library

## Facets
- artifact type: library
- maturity: stable
- function: serialization, parser
- domain: developer-tools, apis, files
- platform: c, cpp, windows, cross-platform
- tags: json, c-library, utf-8, no-dependencies, linux, macos, android

## Member repositories
- akheron/jansson (main) score 82

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:58.040824+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:40:53.034994+00:00, confidence not recorded.
  - readme: https://github.com/akheron/jansson (fetched 2026-08-28T04:07:58.040824+00:00, sha 86c63b4b0fc6)
  - homepage: http://www.digip.org/jansson/ (fetched 2026-08-29T09:33:50.152679+00:00, sha 2b1dfe9f0aca)
- Data as of 2026-08-30T08:39:29.467469+00:00.