Work · alternatives · 2026
24 alternatives to W3C dev tools
Lead your code to its full potential
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. W3C dev tools launched in 2019; newer entries below may have overtaken it.
- 1
Yes, it's open source: https://github.com/lissy93/web-check :) Why I'm building this? There are a lot of tools out there for discovering meta and security data relating to a website, IP or server. But currently, there isn't anything that does everything, all in one place and without a paywall/ user sign up. It's still a WIP, and I'm working on a new version, with some more comprehensive checks, so any feedback would be much appreciated :)
2024 · v1.web-check.xyz · its alternatives →
- 2
Ensure web inclusivity & compliance with just a few clicks.
2025 · testmuai.com · its alternatives →
- 3
Web Code Tools▲329Easy snippets of code essentials and generators
2017 · webcode.tools · its alternatives →
- 4
CSS Scan 3.0▲256The fastest and easiest way to check, copy and edit CSS
2022 · getcssscan.com · its alternatives →
- 5
Passmarked▲275Simple, all-in-one test to check the quality of your website
2018 · passmarked.com · its alternatives →
- 6
Goodbye to "Inspect Element" — Visualize the CSS of any element you hover over, instantly, and copy its entire rules with a single click.
2022 · getcssscan.com · its alternatives →
- 7
Web and document accessibility test and monitoring platform
2023 · accessibilitycloud.com · its alternatives →
- 8
WEBCode.run▲93Create services in developer friendly notebooks
2022 · webcode.run · its alternatives →
- 9
WebCodeSniffer▲114Validate your code for consistency with a coding standard.
2018 · webcodesniffer.net · its alternatives →
- 10
The Practical Security Checklist for Web Developers
2016 · github.com · its alternatives →
- 11
LambdaTest▲127Ensure your web-apps work seamlessly across all browsers.
2018 · testmuai.com · its alternatives →
- 12
Web Inspector▲107Inspect, debug, and extract — all in one web tool
2025 · chromewebstore.google.com · its alternatives →
- 13
Discover the best resource for learning web programming
2023 · 1amitarora.gumroad.com · its alternatives →
- 14
I've developed a handy tool for Visual Studio Code that makes checking CSS compatibility very easy for developers. It provides instant feedback on syntax, keywords, types, and function compatibility. It even highlights deprecated, non-standard, and experimental features.
2024 · github.com · its alternatives →
- 15
- 16
Free HTML, CSS, JSON & XML validator with quality scores
Mar 2026 · validatehtml.com · its alternatives →
- 17
Validate W3C, WCAG & Responsive Design in Pages & IFrames
Feb 2026 · chromewebstore.google.com · its alternatives →
- 18
- 19
Annotate and discuss web pages in real time.
2022 · webhighlighter.com · its alternatives →
- 20
Check color contrast ratio and follow WCAG with ease
2023 · venngage.com · its alternatives →
- 21
Check color combinations of DOM elements wrt contrast W3C
2019 · checkmycolours.com · its alternatives →
- 22
It's like Lighthouse for CSS code quality
2024 · projectwallace.com · its alternatives →
- 23
Code Beautifier, Minifier & Online Tools Hub
2025 · beautifyourcode.com · its alternatives →
- 24
npm package that can help you validate if your markup is compliant with w3c standards. Easy integration with testing libraries.
2023 · github.com · its alternatives →
Also compare
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 →