# PaulJuliusMartinez/jless

jless is a command-line JSON viewer designed for reading, exploring, and searching through JSON data.

Repository: https://github.com/PaulJuliusMartinez/jless
Canonical: https://ross.abutalabs.com/products/jless
Homepage: https://jless.io
Language: Rust
License: MIT
License Family: permissive
Topics: json, cli, rust
Last push: 2026-08-25T03:22:38+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 8, longevity 100
- inputs: {"age_days": 1957, "days_push": 8, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5468, forks 118 (observed 2026-08-28T04:09:19.574079+00:00)

## What it is
jless is a command-line JSON viewer written in Rust for reading, exploring, and searching JSON data with syntax highlighting, collapsible objects/arrays, vim-inspired navigation, and regex search. It installs as a single standalone binary and is a replacement for combining less, jq, cat, and an editor.

## Use cases
- view and explore large json files in the terminal
- pretty print json with syntax highlighting
- debug api request and response payloads
- search json data with regular expressions
- collapse and expand nested json objects and arrays
- copy unescaped string values from json to clipboard

## When to choose
- you frequently inspect json files or api responses in the terminal
- you want a vim-like navigation experience for structured data
- you need a fast single-binary tool without runtime dependencies
- you find jq output hard to read and want an interactive viewer

## When to avoid
- you need Windows support, which is not yet available
- you need to transform or query json programmatically rather than view it (use jq)
- you want a GUI json viewer
- you need yaml or other formats beyond json

## Facets
- artifact type: cli-tool
- maturity: active
- function: developer-tools, cli, json, search-engine
- domain: developer-tools, files
- platform: cli, rust
- tags: json-viewer, terminal-ui, vim-inspired, syntax-highlighting, pager, command-line, macos, linux

## Member repositories
- PaulJuliusMartinez/jless (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:19.574079+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 2026-08-29T17:56:44.709493+00:00, confidence not recorded.
  - readme: https://github.com/PaulJuliusMartinez/jless (fetched 2026-08-28T04:09:19.574079+00:00, sha 4d973a25ec2e)
  - homepage: https://jless.io (fetched 2026-08-29T08:51:46.299278+00:00, sha 04a4b4e171e6)
  - registry_crates: https://crates.io/api/v1/crates/jless (fetched 2026-08-29T08:51:46.310775+00:00, sha d4b6656cc10f)
  - site_page: https://jless.io/releases (fetched 2026-08-29T08:51:46.308366+00:00, sha 72ba249734c8)
- Data as of 2026-08-30T08:39:29.467469+00:00.