Dead Pixel Test

What it does

Detect dead pixels, stuck pixels, and LCD defects on any screen – phones, tablets, monitors, and laptops. A free, browser-based tool that cycles through solid colors (red, green, blue, white, black) in fullscreen mode. No download, no signup, works on any device with a web browser. Perfect for: - Testing new monitor purchases before the return window - Checking used/refurbished displays - Quick diagnosis when you suspect screen defects

Test your screen for dead pixels instantly. Free online tool displays 5 solid colors. Works on any monitor, laptop, or TV. No download or signup required.

A dead pixel test is a screen diagnostic tool that displays solid colors across your entire display to help you identify pixels that are not functioning correctly. Dead pixels appear as black dots that stay black regardless of what color is shown on screen. This test cycles through white, black, red, green, and blue backgrounds so you can spot any pixel that doesn't change color as expected. Tip: Test in a dimly lit room and view from your normal sitting distance. Dead pixels are easier to spot on white and black backgrounds. You just bought a new monitor. Test it immediately so you can return or exchange within the retailer's return window (usually 14-30 days). You're buying a used laptop…from deadpixel-test.online

• 
  Dead Pixel Test and FixJun 2026 · deadpixeldetect.com · ▲3

  Find and fix dead, stuck & hot pixels on any screen

• 
  Check dead pixelsJul 2026 · checkdeadpixels.com · ▲1

  Fast, ad-free dead pixel tester with color-blind mode.

• 
  White Screen TesterJun 2026 · whitescreenstester.com · ▲2

  Test your screen for dead pixels and display issues

• 
  ScreenTestJan 2026 · screentest.io · ▲7

  Free web-based tools for screen & monitor testing

• 
  WhiteScreenTest.Net2025 · whitescreentest.net · ▲7

  Check Screen Errors Online

• 
  ScreenTestToolJul 2026 · screentesttool.com · ▲2

  The ultimate online screen test & display diagnostics hub

• 
  /dev/null▲489

  a social network for devs

  Dev tools · 3d ago · dev-null.sh

• 
  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 · 28d ago · github.com

• 
  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 · 26d ago · github.com

• 
  OpenBot▲362

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

  Dev tools · 23d ago · openbot.run

• 
  Talanoa▲346

  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 · 21d ago · talanoa.email

• 
  CoreSpeed▲332

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

  Dev tools · 29d ago · corespeed.io

• 
  Fundraisly▲1,537

  AI fundraising agent that finds investors and books meetings

  AI · Jun 2026 · fundraisly.com

• 
  Homebrew 6.0.0▲1,481

  Today, I’m proud to announce Homebrew 6.0.0. The most significant changes since 5.1.0 are a new tap trust security mechanism, the new faster, smaller, default internal Homebrew JSON API, sandboxing on Linux, better defaults informed by our user survey, many brew bundle improvements, improved performance and initial support for macOS 27 (Golden Gate). Happy to discuss any questions here!

  Dev tools · Jun 2026 · brew.sh

• 
  Performative-UI – A react component library of design tropes▲1,181

  Hi HN! I was super frustrated at apps like tiktok and wechat preventing me from saving or downloading the animated gifs, so I made a little tool to turn a screen recording into a slack-sized emoji. Hope you get some value from this!

  Life & fun · Jun 2026 · vorpus.github.io

• 
  Upstream▲976

  The inbox designed for humans and agents

  AI · Jun 2026 · upstream.do

• 
  Goldfish▲958

  Press Option. It knows your work and replies like you

  AI · Jun 2026 · goldfish.sh

• 
  I made Google Trends for Hacker News by indexing 18 years of comments▲822

  Search 18 years of Hacker News and chart how any topic, tool, or person trended. Overlay terms to compare their rise and fall across 45M posts and comments.

  Life & fun · Jun 2026 · hackernewstrends.com