# 01mf02/jaq

A jq clone focussed on correctness, speed, and simplicity

Repository: https://github.com/01mf02/jaq
Canonical: https://ross.abutalabs.com/products/jaq
Language: Rust
License: MIT
License Family: permissive
Topics: jq, json, query, rust
Last push: 2026-08-19T10:39:13+00:00

## Health v2 (maintenance only)
Score: 94/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 98, release rhythm 84, longevity 100
- inputs: {"age_days": 2097, "days_push": 14, "days_rel": 28, "gap_med": 58.5, "n_releases_24m": 9}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3727, forks 119 (observed 2026-08-28T04:08:15.657360+00:00)

## What it is
jaq is a clone of the jq JSON processing tool written in Rust, focused on correctness, speed, and simplicity, usable as a drop-in replacement for jq. It also ships as a Rust library (jaq-core) for compiling and running jq programs, with support for YAML, CBOR, TOML, and XML data formats.

## Use cases
- query and transform json from the command line
- faster drop-in replacement for jq
- run jq filters inside a rust program
- process yaml, toml, cbor, or xml with jq syntax
- batch-process many small json files quickly

## When to choose
- you want jq-compatible filtering with better startup time and performance
- you need to embed a jq interpreter in Rust, especially multi-threaded code
- you need jq-style queries over non-JSON formats like YAML or TOML

## When to avoid
- you rely on jq features or plugins jaq does not implement
- you need exact jq bug-for-bug compatibility
- you prefer the canonical jq implementation and its ecosystem

## Facets
- artifact type: cli-tool
- maturity: active
- function: parser, serialization, cli, developer-tools
- domain: developer-tools, files
- platform: windows, rust, cli
- tags: jq-clone, json-query, yaml, cbor, toml, xml, rust-library, command-line, linux, macos

## Member repositories
- 01mf02/jaq (main) score 94

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:15.657360+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 2026-08-29T18:29:14.748587+00:00, confidence not recorded.
  - readme: https://github.com/01mf02/jaq (fetched 2026-08-28T04:08:15.657360+00:00, sha bb41980f9b57)
  - registry_crates: https://crates.io/api/v1/crates/jaq (fetched 2026-08-29T09:23:45.753396+00:00, sha f88fd9248f7b)
- Data as of 2026-08-30T08:39:29.467469+00:00.