# Regexper

Regular Expression Visualization Site (static site version) -- migrated to https://gitlab.com/javallone/regexper-static

Repository: https://github.com/javallone/regexper-static
Canonical: https://ross.abutalabs.com/products/regexper
Language: JavaScript
License: MIT
License Family: permissive
Archived: true
Last push: 2018-06-06T05:35:49+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4268, "days_push": 3010, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2270, forks 334 (observed 2026-08-28T04:06:33.070277+00:00)

## What it is
Regexper is a web application that visualizes regular expressions as SVG railroad diagrams, powering regexper.com. This repository is the static site version, which has been migrated to GitLab.

## Use cases
- visualize a regular expression as a diagram
- understand a complex regex
- explain regex syntax to teammates
- debug a regular expression
- generate railroad diagrams from regex patterns

## When to choose
- you need to understand or document a regular expression visually
- you want a self-hosted regex visualization site

## When to avoid
- you need an actively maintained tool - development has moved to GitLab and the GitHub repo is archived
- you need regex testing/matching rather than visualization

## Facets
- artifact type: application
- maturity: maintenance
- function: developer-tools, documentation, parser
- domain: developer-tools, web-development, parsers
- platform: -
- tags: regex-visualization, regular-expressions, static-site, diagrams, nodejs, web-server, javascript

## Member repositories
- javallone/regexper-static (main) score 10
- javallone/regexper (mirror) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:33.070277+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 2026-08-30T02:41:49.132911+00:00, confidence not recorded.
  - readme: https://github.com/javallone/regexper-static (fetched 2026-08-28T04:06:33.070277+00:00, sha 91400d458acd)
- Data as of 2026-08-30T08:39:29.467469+00:00.