Anonymous aggregate viewport measurements from ScreenSize.net browser sessions, with sample size, quality exclusions and methodology shown alongside the results.
Aggregate sessionsSnapshot from 2026-09-14Quality rules v1
Status
Showing a partial snapshot
Snapshot samples shown
751
Snapshot coverage
Partial export
Collection period
Snapshot from 2026-09-14
Key findings
These observations describe qualified ScreenSize.net sessions during the reporting period. They are not global device or browser market-share estimates.
01
The most common desktop viewport is 1920 × 920 CSS pixels, representing 15.7% of 648 snapshot samples shown.
02
The most common mobile viewport width is 400px, representing 64.1% of 103 snapshot samples shown.
03
The most common device pixel ratio bucket is 1.00×, representing 64.6% of 751 snapshot samples shown.
Coverage
Each environment is evaluated independently. Rankings stay hidden until that environment reaches the minimum display sample.
| Environment | Snapshot samples shown | Publication status |
|---|---|---|
| Desktop | 648 | Distribution available |
| Mobile | 103 | Distribution available |
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
648 snapshot samples shown.
1920 px30.7% · 199
1280 px13.3% · 86
1520 px9.7% · 63
800 px5.4% · 35
2560 px5.4% · 35
1480 px5.2% · 34
1360 px4.8% · 31
1440 px4.2% · 27
1920 × 92015.7% · 102
1920 × 10806% · 39
800 × 6005.4% · 35
1920 × 9605.4% · 35
1280 × 7204% · 26
2560 × 12803.9% · 25
1280 × 8003.7% · 24
1520 × 7003.4% · 22
Mobile
103 snapshot samples shown.
400 px64.1% · 66
420 px20.4% · 21
380 px9.7% · 10
600 px2.9% · 3
800 px2.9% · 3
400 × 66031.1% · 32
400 × 7009.7% · 10
400 × 7208.7% · 9
420 × 8007.8% · 8
380 × 6206.8% · 7
400 × 7804.9% · 5
420 × 7204.9% · 5
420 × 7804.9% · 5
Density
Methodology
The report describes this site's measured browser sessions, not global device or browser market share.
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.
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.
Audit details