# bluelinelabs/LoganSquare

Screaming fast JSON parsing and serialization library for Android.

Repository: https://github.com/bluelinelabs/LoganSquare
Canonical: https://ross.abutalabs.com/products/logansquare
Language: Java
License: Apache-2.0
License Family: permissive
Last push: 2021-12-07T11:35:04+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4215, "days_push": 1730, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3180, forks 303 (observed 2026-08-28T04:07:47.781675+00:00)

## What it is
LoganSquare is a fast JSON parsing and serialization library for Android, built on Jackson's streaming API with compile-time annotation processing. Models are annotated with @JsonObject and @JsonField, and code is generated to outperform GSON and Jackson Databind.

## Use cases
- parse json responses on android
- serialize model objects to json in an android app
- faster json parsing than gson
- annotation-based json mapping for android models
- reduce json parsing overhead in mobile apps

## When to choose
- you need maximum JSON parse/serialize performance on Android
- you prefer compile-time code generation over reflection
- your app parses large volumes of JSON on mobile devices

## When to avoid
- you need a maintained library with recent updates
- your project uses Kotlin-first serialization solutions
- you want a library with broad community support going forward

## Facets
- artifact type: library
- maturity: maintenance
- function: serialization, parser
- domain: mobile-development, android-tools, developer-tools
- platform: jvm
- tags: json, annotation-processing, jackson, performance, android

## Member repositories
- bluelinelabs/LoganSquare (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:47.781675+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 2026-08-30T07:25:05.425382+00:00, confidence not recorded.
  - readme: https://github.com/bluelinelabs/LoganSquare (fetched 2026-08-28T04:07:47.781675+00:00, sha b4127eb9bba8)
- Data as of 2026-08-30T08:39:29.467469+00:00.