Comparium

What it does

Compare the display of your web design no matter the operating system, browser, and its version. Check your site for any visual bugs. Make complicated web testing easy.

Explore guides, tips, and tools for website compatibility testing. Learn how to use browser emulators to ensure your site works seamlessly across different browsers, devices, and operating systems.

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  Blisk Browser2016 · blisk.io · ▲428

  A Chromium-based browser for Web developers

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  Browserbite2015 · ▲135

  Automatic cross browser layout testing

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  I made tool that let's you see everything about any website2024 · v1.web-check.xyz · ▲411

  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 :)

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  Responsive Website Test2020 · usepastel.com · ▲133

  Test any website on desktop, mobile, and tablet

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  Preflight 2.02020 · preflight.com · ▲127

  Automated UI testing for your Websites & Web Apps

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  Glance Mar 2026 · glance.debugbase.io · ▲87

  Real browser for Claude Code Test, Screenshot, Automate

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  /dev/null▲482

  a social network for devs

  Dev tools · 2d ago · dev-null.sh

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  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 27d ago · github.com

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  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 25d ago · github.com

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  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 22d ago · openbot.run

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  Talanoa▲343

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 20d ago · talanoa.email

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  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 28d ago · corespeed.io

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  Blush▲1,462

  Illustrations for everyone

  Dev tools · 2020 · blush.design

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  SHA-256 Animation▲1,053

  Animation of the SHA-256 hash function in your terminal. - in3rsha/sha256-animation

  Dev tools · 2020 · github.com

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  This Word Does Not Exist▲956

  This Word Does Not Exist uses an artificial intelligence model named GPT-2 to invent new English words.

  AI · 2020 · thisworddoesnotexist.com

• P3
  Plotting 3 years of hourly data in 150ms▲785

  Life & fun · 2020 · leeoniya.github.io

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  Untools▲783

  Hand-picked tools for better thinking

  Work · 2020 · untools.co

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  Copytesting▲781

  Improve your website copy based on data from your audience

  Growth · 2020 · wynter.com