Nutter Tools
Nutter Tools

A free toolbox that runs in your browser. A tool for every job.

Your files never leave your device

Images

  • Convert images
  • Compress images
  • Resize images
  • Crop
  • Watermark

PDF & files

  • Merge PDFs
  • Split a PDF
  • Images to PDF
  • PDF to images
  • Remove photo location

Video & audio

  • Compress video
  • Convert video
  • Video to GIF
  • Convert audio
  • Trim audio

Everyday

  • QR codes
  • Passwords
  • Time zones
  • Unit converter
  • Word count
  • Webcam test

Developer

  • JSON formatter
  • Base64
  • Regex tester
  • Hashes
  • JWT decoder

Site

  • About
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  • Site map
  • llms.txt

Everyday

  • Images
  • Video
  • Audio
  • PDF & files
  • Text
  • QR codes
  • Units & math
  • Time & dates
  • Color
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  • Device tests
  • Sun & moon

For developers

  • JSON
  • Encoding
  • Regex & cron
  • Web & auth
  • Hashing & encryption
  • Config files
  • Network
  • Browser
  • AI
  • Fake data
© Nutter Toolsnutter.tools
  1. Home
  2. Device tests
  3. Monitor test
Your files stay on your device

Monitor test

Run full-screen test patterns to spot dead pixels, backlight bleed, clouding, and banding, mark faults on a screen map, and export a PNG report.

This tool is in beta

Still being tested. If a result looks wrong, tell us.

Report a problem

Report

Place marks on the map to build the report.

Marks you place show up here

This tool cannot see your screen. It shows known patterns and your eyes do the detecting, so clean the panel and work in a dark room before you judge anything. Dust mimics dead pixels; tilt mimics bleed. The report, the marks, and any photo stay in this tab: the PNG is drawn locally and nothing is uploaded. The tool says nothing about warranty terms, which manufacturers set by pixel count and location.

Inspection

Device presetSets the advice, not the math

Keys 1 to 14 jump between patterns, arrow keys cycle, Escape exits. Press 1 and 4 in quick succession for pattern 14.

Mark typeApplied to the next map click
Screen mapClick where you saw the fault
Your marks 0
Optional, up to 500 characters
PhotoStays in this tab; drawn into the PNG report only

Up to 200 marks per report. A mark note can run to 120 characters.

More device tests

  • Dead pixel test
  • Refresh rate test
  • Screen & viewport
All device tests

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