# mattkersley/Responsive-Design-Testing

A simple HTML page to test out your responsive web design

Repository: https://github.com/mattkersley/Responsive-Design-Testing
Canonical: https://ross.abutalabs.com/products/responsive-design-testing
Homepage: http://mattkersley.com/responsive
Language: JavaScript
License Family: other
Last push: 2024-02-29T10:25:27+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5525, "days_push": 916, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1082, forks 525 (observed 2026-08-28T04:03:31.013114+00:00)

## What it is
A simple self-hostable HTML/JavaScript page that displays a website in multiple iframe widths to test responsive web design. It supports permalink-style testing by appending a URL to the testing page address.

## Use cases
- test responsive web design at multiple screen widths
- preview a website on phone and tablet sizes
- share a responsive testing link with a teammate
- self-host a responsive design testing tool
- check breakpoints while building a website

## When to choose
- you need a quick, zero-dependency way to view a page at common device widths
- you can host the tool on the same site you are testing so iframe navigation works

## When to avoid
- you need pixel-perfect viewport emulation or real device testing
- you need to test external sites with in-frame navigation (blocked by browser security)
- you need automated or scripted responsive testing

## Facets
- artifact type: application
- maturity: maintenance
- function: testing, developer-tools
- domain: web-development, frontend, testing
- platform: browser
- tags: responsive-design, iframe-testing, screen-widths, self-hosted, web-server

## Member repositories
- mattkersley/Responsive-Design-Testing (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:31.013114+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 2026-08-30T06:51:16.912471+00:00, confidence not recorded.
  - readme: https://github.com/mattkersley/Responsive-Design-Testing (fetched 2026-08-28T04:03:31.013114+00:00, sha 215c50f75556)
  - homepage: http://mattkersley.com/responsive (fetched 2026-08-29T12:53:25.070108+00:00, sha 0c1ac200fd44)
- Data as of 2026-08-30T08:39:29.467469+00:00.