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YuliusBox vs Screen Size Checker

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

YuliusBox compared with Screen Size Checker
Detail YuliusBoxScreen Size Checker logo Screen Size Checker
What it doesFree online tools that run in your browser Instant screen resolution and viewport size checker for developers and designers
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFree Free
PricingNot given Not given
Key features
  • Image compression with no visible quality loss
  • Merge and shrink multiple PDFs
  • Convert MP4 and MOV to GIF without watermark
  • AI Excel formula generator from plain English descriptions
  • Audio transcription with Whisper AI on-device
  • ID photo watermark protector
  • HEIC to JPG conversion
  • Office-to-PDF converters (Word, Excel, PowerPoint, URL)
  • Tools run offline after page loads
  • File encryption
  • Screen Resolution Detection
  • Viewport Size Measurement
  • Device Pixel Ratio (DPR) Check
  • Operating System Detection
  • Browser Version Information
  • Touch Support Detection
  • User Agent String Display
  • Real-time Screen Analysis
What makes it different
  • All processing happens on your device—nothing is sent to servers or stored
  • Open source code auditable on GitHub
  • No accounts required; works instantly
  • Built specifically for sensitive files that should never be uploaded
  • No data collection, ads, or analytics on files
  • Real-time detection of browser viewport, screen resolution and device specifications without installation
  • Helps developers create responsive websites that look great on all devices
  • Educational resources explaining CSS pixels versus physical measurements
  • Maintained as independent web tool kept fast, readable and useful
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)8 no change since last check23 no change since last check
Trust Flow (Majestic)05
Citation Flow (Majestic)2225
Referring domains (Majestic)1244

4 details filled in for both companies.

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