# simplejson/simplejson

simplejson is a simple, fast, extensible JSON encoder/decoder for Python

Repository: https://github.com/simplejson/simplejson
Canonical: https://ross.abutalabs.com/products/simplejson
Homepage: https://simplejson.readthedocs.io/
Language: Python
License: NOASSERTION
License Family: other
Topics: json, python, python3, python2, json-parser, json-serializer
Last push: 2026-08-26T15:03:10+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 99, longevity 100
- inputs: {"age_days": 5687, "days_push": 7, "days_rel": 7, "gap_med": 3, "n_releases_24m": 8}
- 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 1711, forks 355 (observed 2026-08-28T04:05:25.796778+00:00)

## What it is
simple is a simple, fast, complete and extensible JSON encoder/decoder for Python 3.8+ with legacy Python 2.7 support. It is pure Python with an optional C extension for speed, and is the externally maintained development version of Python's built-in  library.

## Use cases
- serialize and deserialize JSON in Python
- parse JSON strings with custom encodings
- customize JSON serialization for arbitrary objects
- post-process parsed JSON with object hooks
- embed pre-encoded JSON with RawJSON
- get faster JSON performance than the stdlib via C extension
- maintain legacy Python 2.7 codebases needing JSON

## When to choose
- you need JSON features or bug fixes not yet in the stdlib  module
- you need to support Python 2.7 alongside Python 3
- you need faster JSON encoding/decoding via the optional C extension
- you need extensible serialization with default hooks or object_hooks

## When to avoid
- your project only targets modern Python and stdlib  meets your needs
- you need a non-JSON serialization format
- you want a zero-maintenance dependency-free solution

## Facets
- artifact type: library
- maturity: stable
- function: serialization, parser
- domain: developer-tools, apis, files
- platform: python
- tags: -encoder, -decoder, c-extension, python2-legacy

## Member repositories
- simplejson/simplejson (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:25.796778+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 2026-08-30T03:35:02.091413+00:00, confidence not recorded.
  - readme: https://github.com/simplejson/simplejson (fetched 2026-08-28T04:05:25.796778+00:00, sha 7978465a31a8)
- Data as of 2026-08-30T08:39:29.467469+00:00.