Dev tools · alternatives · 2026

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Improve quality of CSS and XPath locators for browser testing launched in 2019; newer entries below may have overtaken it.

1. 1
   Automated Responsive Design Testing▲65

   A step-by-step guide to cross-browser layout testing

   2016 · tinnedfruit.com · its alternatives →

2. 2
   Squints▲81

   Design tools for the live web

   29d ago · squints.app · its alternatives →

3. 3
   Stylestats▲59

   A Node.js library to collect CSS statistics

   2014 · stylestats.org · its alternatives →

4. 4
   Pesticide▲65

   Faster CSS layout debugging

   2014 · its alternatives →

5. 5
   Remarkable▲82

   a JavaScript Markdown and Commonmark parser

   2014 · github.com · its alternatives →

6. 6
   Descartes▲3

   An experimental library for writing CSS in JavaScript

   2016 · descartes.io · its alternatives →

7. 7AC
   Awsm.css – Simple CSS library for semantic HTML markup▲5

   2016 · igoradamenko.github.io · its alternatives →

8. 8
   Awsm.css 2.0 “Charmander” – Simple CSS library for semantic HTML markup▲5

   2017 · github.com · its alternatives →

9. 9
   Ctr – The CSS Framework▲5

   2017 · ctr-lang.com · its alternatives →

10. 10SW
    site-wide HTML5 and CSS3 validator▲5

    2012 · markupvalidator.com · its alternatives →

11. 11CA
    CSSKatas – A better way to sharpen your CSS skills▲8

    2020 · yiming.dev · its alternatives →

12. 12
    Sonar▲14

    A linting tool for the web

    2017 · its alternatives →

13. 13
    Matt's DOM Utils—a modular HTML DOM library with wide browser support▲6

    2012 · fortybelow.ca · its alternatives →

14. 14AT
    A toolkit for CSS3-based industrial monitoring components.▲9

    2013 · valdez42.github.io · its alternatives →

15. 15SA
    Sandbox – A lightweight CSS only framework▲7

    2019 · dlcnine.github.io · its alternatives →

16. 169C
    999.css, a barebones CSS framework in 999 bytes (Not gzipped)▲7

    2016 · 999.surge.sh · its alternatives →

17. 17IC
    Immutable CSS – A CSS linter for immutable selectors▲6

    2015 · immutablecss.com · its alternatives →

18. 18BC
    Backbreeze CSS – A utility class library written in Sass▲7

    2020 · backbreezecss.com · its alternatives →

19. 19
    Quilted▲3

    A css/js coverage tool for websites built using Puppeteer.

    2018 · github.com · its alternatives →

20. 20A6
    A 683 byte tooltip in pure CSS▲9

    2016 · mightycrow.github.io · its alternatives →

21. 21RJ
    Rethinking JavaScript Test Coverage▲8

    2018 · medium.com · its alternatives →

22. 22SE
    Search Explorer – A new kind of WMT-based SEO tool, needs alpha testers▲9

    2015 · searchexplorer.com · its alternatives →

23. 23AB
    A browser extension for simple font inspection▲8

    2018 · fontanello.oktavilla.se · its alternatives →

24. 24LT
    Little typographic experiment with SVG and CSS transitions▲5

    2013 · codepen.io · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →