Screen Resolution Detector
This tool detects and displays your current screen resolution, device pixel ratio, and other display information. It helps web developers, designers, and anyone who needs to know their screen specifications.
How to use: Simply view this page and your screen resolution information will be displayed automatically. Click “Refresh Info” if you change your display settings or rotate your device.
Detect your screen resolution, viewport size, and color depth instantly. Free tool for web developers and designers. No installation required.
Screen Resolution Detector: Know Exactly What Your Users See
Your website looks different on every screen size.
Knowing your own resolution helps you test responsive design.
A screen resolution detector shows you exactly what your display is using.
You do not need to dig through system settings.
Just open the tool, and your screen data appears instantly.
Perfect for developers, designers, and tech support.
What Is a Screen Resolution Detector?
A screen resolution detector reads your display information.
It shows your screen width and height in pixels.
It also shows your viewport size (browser window).
For example, a common laptop screen is 1920 x 1080 pixels.
Your browser viewport might be 1536 x 720 after toolbars.
Both numbers matter for web design.
Core Functions of a Good Resolution Detector
- Show screen resolution (full display size)
- Show viewport size (browser window size)
- Display color depth and pixel ratio
- Detect multiple monitors (if applicable)
- Update in real time when you resize
Our tool includes all these features.
No installation or system access required.
Why You Need a Screen Resolution Detector
Screen resolution affects how websites appear.
Here is why this tool is valuable.
Web Development Testing
You need to know how your site looks at different sizes.
Check your current resolution as a baseline.
Resize your browser and see viewport changes in real time.
Responsive Design Debugging
A layout breaks at certain screen widths.
The detector tells you the exact width where it breaks.
Fix your CSS breakpoints accurately.
Technical Support
Users say “my screen is weird” but cannot explain.
Ask them to open the resolution detector.
Get exact numbers to diagnose the issue.
Remote Work Setup
Multiple monitors may have different resolutions.
Check each monitor to ensure consistency.
Calibrate your workspace for better productivity.
Digital Art and Design
Designing for specific screen sizes?
Know exactly what resolution you are working with.
Match your canvas size to target devices.
How to Use Our Screen Resolution Detector
The tool is built for instant results.
Follow these steps to see your display information.
Step-by-Step Guide
- Open the tool in any browser.
- View your screen resolution automatically.
- See your viewport size (resize browser to update).
- Check color depth and pixel ratio.
- Resize your browser window to see changes.
The tool updates in real time.
No buttons to click or settings to adjust.
Everything is displayed immediately.
Pro Tips for Best Results
- Resize your browser to test responsive breakpoints.
- Check both your main and secondary monitors.
- Use the viewport size for CSS media queries.
- Compare your resolution to common device sizes.
- Bookmark the tool for frequent testing.
Understanding Your Display Data
Each number tells you something important.
Here is what the data means.
Screen Resolution
Example: 1920 x 1080 pixels (Full HD)
What it is: Total pixels on your physical screen.
Why it matters: Maximum space available for content.
Viewport Size
Example: 1536 x 720 pixels
What it is: Browser window size after toolbars.
Why it matters: Actual space your website has to work with.
Color Depth
Example: 24-bit (16.7 million colors)
What it is: How many colors your screen can display.
Why it matters: Affects image and gradient rendering.
Pixel Ratio (DPR)
Example: 1.0 (standard), 2.0 (Retina), 3.0 (high-end)
What it is: Physical pixels per CSS pixel.
Why it matters: High ratio means sharper images needed.
Device Pixel Ratio Examples
1.0: Standard desktop monitors, older laptops
2.0: Most Retina MacBooks, high-end Android phones
3.0: iPhone Pro, flagship Android devices
Common Screen Resolutions
Knowing common resolutions helps you design better.
Here are the most frequently used screen sizes.
Desktop Monitors
| Resolution | Common Use |
|---|---|
| 1920 x 1080 | Most common (Full HD) |
| 1366 x 768 | Budget laptops, older monitors |
| 2560 x 1440 | Gaming, professional (2K) |
| 3840 x 2160 | High-end (4K) |
| 1280 x 720 | Older laptops |
Mobile Devices
| Resolution | Devices |
|---|---|
| 375 x 667 | iPhone SE, iPhone 8 |
| 390 x 844 | iPhone 12/13/14/15 |
| 393 x 852 | iPhone 15 Pro |
| 360 x 800 | Common Android phones |
| 412 x 915 | Samsung Galaxy flagships |
Tablets
| Resolution | Devices |
|---|---|
| 768 x 1024 | iPad Mini |
| 810 x 1080 | iPad (older) |
| 834 x 1194 | iPad Pro 11″ |
| 1024 x 1366 | iPad Pro 12.9″ |
Our detector shows your exact resolution.
Compare it to these common sizes.
Screen Resolution vs. Viewport Size
Many people confuse these two measurements.
Here is the difference.
Screen Resolution
The physical pixel count of your display.
Does not change unless you buy a new monitor.
Example: 1920 x 1080 (laptop screen)
Viewport Size
The browser window size available for content.
Changes when you resize the browser.
Example: 1536 x 720 (after address bar and tabs)
Why the Difference Matters
A website that fits your screen may not fit your viewport.
Browser toolbars take up valuable space.
Test at actual viewport sizes, not screen resolution.
How to Test Responsive Design
- Open your website in a browser.
- Resize the browser window.
- Watch the viewport size in our detector.
- See when your layout breaks.
- Fix CSS breakpoints at those sizes.
Real-World Examples
Seeing actual detection makes the value clear.
Here are common scenarios.
Example 1: Standard Laptop
Screen: 1920 x 1080
Viewport: 1536 x 720 (full screen with taskbar)
Color depth: 24-bit
Pixel ratio: 1.0
Use: Standard web development
Example 2: Retina MacBook
Screen: 2560 x 1600
Viewport: 2048 x 1100
Pixel ratio: 2.0
Use: Design for high-DPI displays
Example 3: External Monitor
Screen: 3840 x 2160 (4K)
Viewport: 3840 x 2040
Pixel ratio: 2.0 or 3.0
Use: Test 4K content display
Example 4: Browser Not Full Screen
Screen: 1920 x 1080
Viewport: 1200 x 800 (windowed mode)
Use: See how site looks in smaller windows
Resolution Detector for Web Developers
Developers need resolution data constantly.
Here is how to use the tool professionally.
Testing Media Queries
Your CSS uses @media (max-width: 768px).
Resize browser to exactly 768px viewport.
Check if your media query triggers correctly.
Debugging Layout Shifts
Layout breaks at 800px but works at 801px.
Our detector shows exact viewport width.
Adjust breakpoint to fix the issue.
Client Communication
Client says “it looks wrong on my screen.”
Ask for viewport size from our detector.
Reproduce the issue on your end.
Cross-Browser Testing
Same resolution, different browsers.
Check viewport size in Chrome vs Firefox.
Toolbars take different amounts of space.
Resolution Detector for Designers
Designers need accurate canvas sizing.
Here is how to use the tool.
Setting Canvas Size
Check your screen resolution first.
Set your design canvas slightly smaller.
Account for browser chrome and toolbars.
Designing for Specific Devices
Target iPhone 15 screen size: 390 x 844.
Check if your screen is larger or smaller.
Zoom in or out to simulate target device.
Checking Pixel Ratio
Standard screens: design at 1x.
Retina screens: export images at 2x or 3x.
Our detector shows your exact pixel ratio.
Color Depth Awareness
24-bit color is standard.
8-bit or 16-bit may show banding.
Design with color depth limitations in mind.
Common Resolution Detector Mistakes
Even experienced users make these errors.
Avoid them for accurate testing.
Mistake 1: Confusing Resolution and Viewport
Screen resolution is your physical display.
Viewport size is your browser window.
Always test at viewport size, not screen resolution.
Mistake 2: Testing Only Full Screen
Users rarely browse full screen on large monitors.
Test at various window sizes.
Our detector updates as you resize.
Mistake 3: Ignoring Pixel Ratio
Images look pixelated on Retina displays.
Export 2x images for high-DPI screens.
Check pixel ratio before exporting assets.
Mistake 4: Forgetting Browser Chrome
Bookmarks bar takes 30-40 pixels.
Developer tools take even more.
Test with realistic browser configurations.
Mistake 5: One Monitor Only
Many users have multiple monitors.
Each may have different resolution.
Test on all monitors you support.
Privacy and Security
Your screen resolution is not sensitive.
Here is our privacy guarantee.
Our Security Guarantee
- All detection happens in your browser
- No data is ever sent to our server
- Your resolution never leaves your computer
- No storage or logging of any kind
We cannot see or access your display information.
The technology runs locally on your device.
Your privacy is completely protected.
Frequently Asked Questions (FAQs)
What is the difference between screen resolution and viewport?
Screen resolution is your physical display size.
Viewport is your browser window size.
Viewport is what matters for web design.
Why does my viewport change when I resize?
Browser windows can be any size.
Viewport size updates in real time.
Resize to test different screen sizes.
What is a good viewport size for testing?
Yes. Our tool works on phones and tablets.
Screen resolution and viewport are usually the same on mobile.
Can I detect resolution on mobile?
Yes. Our tool works on phones and tablets.
Screen resolution and viewport are usually the same on mobile.
What is color depth?
Number of colors your screen can display.
24-bit = 16.7 million colors (standard).
Lower depths may show color banding.
Does this tool work on multiple monitors?
The tool detects the screen it is displayed on.
Move the browser to different monitors to test each.
Conclusion
Screen resolution affects how your website looks.
Knowing your numbers helps you design better.
A screen resolution detector shows you everything instantly.
Our tool works without uploads or privacy risks.
See screen size, viewport, pixel ratio, and color depth.
Test responsive designs with real-time data.