aq

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aqUniversal data query tool

jq-style queries for JSON, JSONL, YAML, TOML, CSV, TSV, and human-readable tables.

Performance
jq Compatibility
Starlark

jq-style query language

aq follows jq-style result streams and expression semantics rather than inventing a second query model.

More than JSON

Read and write JSON, JSONL, YAML, TOML, CSV, and TSV, plus render output-only tables for inspection.

Scriptable when needed

Optional Starlark integration adds structured file I/O, transforms, automation helpers, and a persistent REPL without changing the core CLI model.

Performance-focused

Current jq-master benchmarking puts aq in the same performance tier, with the exact numbers published in the generated benchmark docs.

What aq is ​

aq is a jq-style command-line tool for querying and transforming structured data across multiple file formats. The CLI is the stable v1 product surface.

Quick examples ​

bash
aq '.users[] | select(.age >= 30) | .name' users.json
aq -f yaml -o json '.services[].port' compose.yaml
aq -o table '.items[] | {name, status, owner}' data.json
aq --stream 'select(.status >= 500)' logs.jsonl
aq --in-place '.version = "2.0"' config.toml

Where to go next ​

Structured querying, rewriting, and Starlark scripting across common data formats.

Released under the MIT License.