# Cron Expression Descriptor

A .NET library that converts cron expressions into human readable descriptions.

Repository: https://github.com/bradymholt/cron-expression-descriptor
Canonical: https://ross.abutalabs.com/products/cron-expression-descriptor
Homepage: https://bradymholt.github.io/cron-expression-descriptor/
Language: C#
License: MIT
License Family: permissive
Topics: cron, cron-expression, cron-libraries, quartz, human-readable-descriptions, nuget, c-sharp
Last push: 2026-07-07T16:39:03+00:00
Link (homepage): https://bradymholt.github.io/cron-expression-descriptor/

## Health v2 (maintenance only)
Score: 87/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 91, release rhythm 74, longevity 100
- inputs: {"age_days": 5312, "days_push": 57, "days_rel": 97, "gap_med": 71.5, "n_releases_24m": 7}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1113, forks 196 (observed 2026-08-28T04:03:38.119700+00:00)

## What it is
cRonstrue is a zero-dependency JavaScript/TypeScript library that parses cron expressions and converts them into human-readable descriptions, supporting 5, 6, and 7 part expressions, Quartz syntax, special characters, and 30+ languages. It is a port of the original C# cron-expression-descriptor library.

## Use cases
- explain what a cron expression means in plain English
- show human-readable schedule descriptions in a scheduler UI
- validate and describe Quartz cron expressions
- display cron schedules in multiple languages
- help users write cron expressions by showing what they mean

## When to choose
- you need to translate cron expressions to readable text in JavaScript or TypeScript
- you need Quartz scheduler expression support or 6/7 part expressions
- you need multilingual (i18n) cron descriptions
- you want a zero-dependency library that works in Node and the browser

## When to avoid
- you need to generate cron expressions from natural language (this does the reverse)
- you need to actually schedule or run jobs on a cron schedule
- you need cron parsing in a language without one of its ports

## Facets
- artifact type: library
- maturity: active
- function: parser, internationalization, developer-tools
- domain: developer-tools
- platform: browser, cross-platform, cli
- tags: cron, cron-expression, scheduling, typescript, zero-dependency, quartz-scheduler, i18n, automation, localization, nodejs

## Member repositories
- bradymholt/cron-expression-descriptor (main) score 87
- bradymholt/cRonstrue (sdk) score 96

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:38.119700+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 2026-08-30T03:47:48.536894+00:00, confidence not recorded.
  - readme: https://github.com/bradymholt/cron-expression-descriptor (fetched 2026-08-28T04:03:38.119700+00:00, sha 9a41619b6625)
  - homepage: https://bradymholt.github.io/cron-expression-descriptor/ (fetched 2026-08-29T11:20:38.034739+00:00, sha 1af35ff0ff12)
- Data as of 2026-08-30T08:39:29.467469+00:00.