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
  • Contact
  • Settings
  • Privacy
  • Terms
  • Site map
  • llms.txt

Everyday

  • Images
  • Video
  • Audio
  • PDF & files
  • Text
  • QR codes
  • Units & math
  • Time & dates
  • Color
  • Passwords & IDs
  • 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. Web & auth
  3. Website responsive test
Your files stay on your device

Website responsive test

Open a URL in live iframes at phone, tablet, laptop, and desktop CSS widths with zoom and rotate controls, a framing-blocked fallback, and a copyable checklist report.

This tool is in beta

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

Report a problem

Address

Enter an address and press Load previews. Without a scheme, https is added.

Example: example.com

The previews are this browser rendering the real site inside iframes at real CSS widths. That is not an emulator: no touch input, no mobile fonts, no mobile user agent, and nothing computed on a phone-sized device is reproduced. Sites can refuse to be framed, and a score out of 100 would be made up, so the checklist stays manual and the load facts stay honest.

Preview and checklist

Previews
ZoomFit shrinks each frame to the stage width

Reload re-mounts every frame. Rotate swaps width and height per device.

What leaves your browser

Each preview loads the address you enter directly from your browser, straight to that site. This page leaves your browser only when you press the button; never on load, never in the background. Nothing is sent anywhere else. Google Analytics still measures the visit to this page, and it never receives what you run through this tool.

Runs on this device. Nothing is uploaded.

More web & auth tools

  • Screen & viewport
  • HTTP timing probe
All web & auth tools

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