What this sample shows
These observations describe qualified ScreenSize.net sessions during the reporting period. They are not global device or browser market-share estimates.
- 01Desktop viewport realityThe most common desktop viewport is 1920 × 920 CSS pixels, representing 11% of 926 qualified desktop samples.
- 02Mobile width concentrationThe most common mobile viewport width is 400px, representing 50% of 154 qualified mobile samples.
- 03Display densityThe most common device pixel ratio bucket is 1.00×, representing 56.8% of 1,080 qualified samples.
Samples by environment
Each environment is evaluated independently. Rankings stay hidden until that environment reaches the minimum display sample.
Legacy tablet samples are excluded because the first classifier could mistake touch-enabled desktop computers for tablets.
Clear dimension anomalies are excluded from rankings but remain in aggregate storage for auditing.
Desktop viewport distribution
926 qualified anonymous session samples.
Most common viewport widths
- 1920 px22.6% · 209
- 1280 px10.5% · 97
- 1520 px8.2% · 76
- 1360 px5% · 46
- 1480 px4.8% · 44
- 1440 px4.6% · 43
- 2560 px4.2% · 39
- 800 px3.8% · 35
Most common viewport pairs
- 1920 × 92011% · 102
- 1920 × 10804.2% · 39
- 800 × 6003.8% · 35
- 1920 × 9603.8% · 35
- 1280 × 7202.8% · 26
- 2560 × 12802.7% · 25
- 1280 × 8002.6% · 24
- 1520 × 7002.4% · 22
Mobile viewport distribution
154 qualified anonymous session samples.
Most common viewport widths
- 400 px50% · 77
- 420 px18.8% · 29
- 380 px13% · 20
- 360 px6.5% · 10
- 440 px5.2% · 8
- 600 px2.6% · 4
- 800 px1.9% · 3
- 460 px0.6% · 1
Most common viewport pairs
- 400 × 66020.8% · 32
- 400 × 7006.5% · 10
- 400 × 7205.8% · 9
- 420 × 8005.2% · 8
- 380 × 6204.5% · 7
- 400 × 7803.2% · 5
- 420 × 7203.2% · 5
- 420 × 7803.2% · 5
Tablet viewport distribution
The tablet distribution remains hidden until it reaches 50 qualified samples.
Device pixel ratio
Browser families
Samples by month
How to read this report
The report describes this site's measured browser sessions, not global device or browser market share.
Collection and privacy
A browser tab contributes at most one sample during its session. Measurements are rounded into monthly aggregate buckets. No IP addresses, user IDs, precise timestamps or full user-agent strings are stored. Global Privacy Control and Do Not Track signals are honored.
Quality and limitations
Viewports wider than 6,000 CSS pixels or taller than 4,000 are excluded from published distributions. Historical DPR values are normalized to 0.05 steps. Device class is inferred locally and remains an approximation; legacy tablet classifications are excluded.
- Raw samples
- 1,232
- Dimension anomalies
- 12
- Legacy tablet samples
- 140
- Aggregate updated
- 2026-09-14
Related tools
- Viewport Size CheckerSee your browser's CSS viewport size and window size live. Updates as you resize — with current responsive breakpoint for developers.
- Device Pixel Ratio CheckerCheck your device pixel ratio (DPR) instantly and understand the difference between CSS pixels and physical pixels, with visual examples.
- Common Screen ResolutionsReference list of common screen resolutions and viewport sizes across desktop, laptop, tablet and mobile, with aspect ratios and usage notes.
- Screen Resolution CheckerCheck the screen size reported by your browser in CSS pixels, see an estimated physical pixel grid, and learn how it differs from native resolution.